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Inner Mongolian Aluminum Rod | Nine Tips for Identifying the Authenticity of Aluminum Alloy Cables

2020-03-02 16:35:09 3808

Since 2006 and 2007, UMI Electric Company and Tianjin Jialu Company brought in aluminum alloy cable technology and products originated from the United States respectively, and started and promoted the domestic aluminum alloy cable business. Aluminum alloy cable technology and products have gradually been widely used in the country. Accepted by the user. Nowadays, the aluminum alloy cable technology is playing an increasingly important role in the practice of "replacing copper with aluminum" in the field of medium and low voltage power distribution to build a resource-saving society. The aluminum alloy cable industry and market are about to enter a booming market. However, there is no scientific and systematic publicity and introduction of this new thing in the market, so that users and related industry personnel have many questions and misunderstandings about the technology and products of aluminum alloy cables, which has affected the healthy development of the industry and the market. . To this end, we need to sort out the basic situation of aluminum alloy cable technology and products, and form this article to readers, hoping to help users and related industry personnel's understanding of aluminum alloy cable technology and products.

一、Aluminum alloy cable technology and product origin

In 1946, the United States formulated a technical policy of "replacing copper with aluminum" to cope with a shortage of copper resources. However, in the 1960s, frequent fires occurred in early-installed aluminum core electrical circuits, and the causes were basically connection failures. Defects in the performance of aluminum cables have led to increasingly prominent hidden safety problems. Electricity departments and residents have complained constantly.

Later, with the development of alloy smelting technology, some metallurgical companies' R & D laboratories did a lot of research, and finally developed aluminum alloys for electrical purposes. In further research, we found that aluminum alloys have very good characteristics, such as greater strength, higher ductility, and better creep resistance. Later, these aluminum alloy materials were included in the 8000 series aluminum alloy product catalog by the American Aluminum Association.

Southwire in the United States in 1968 through the development of aluminum alloy, invented the mainstream grade 8176 aluminum alloy in the 8000 series and made the mainstream North American market 8176 brand aluminum alloy cable products.However, there is no scientific and systematic publicity and introduction of this new thing in the market, so that users and related industry personnel have many questions and misunderstandings about the technology and products of aluminum alloy cables, which has affected the healthy development of the industry and the market. . To this end, we need to sort out the basic situation of aluminum alloy cable technology and products, and form this article to readers, hoping to help users and related industry personnel's understanding of aluminum alloy cable technology and products.

一、Aluminum alloy cable technology and product origin

In 1946, the United States formulated a technical policy of "replacing copper with aluminum" to cope with a shortage of copper resources. However, in the 1960s, frequent fires occurred in early-installed aluminum core electrical circuits, and the causes were basically connection failures. Defects in the performance of aluminum cables have led to increasingly prominent hidden safety problems. Electricity departments and residents have complained constantly.

Later, with the development of alloy smelting technology, some metallurgical companies' R & D laboratories did a lot of research, and finally developed aluminum alloys for electrical purposes. In further research, we found that aluminum alloys have very good characteristics, such as greater strength, higher ductility, and better creep resistance. Later, these aluminum alloy materials were included in the 8000 series aluminum alloy product catalog by the American Aluminum Association.

Southwire in the United States in 1968 through the development of aluminum alloy, invented the mainstream grade 8176 aluminum alloy in the 8000 series and made the mainstream North American market 8176 brand aluminum alloy cable products.

In 1970, related wire and cable companies in the United States, together with companies in other industries such as electrical product laboratories and connector companies, formulated plans to re-evaluate aluminum and aluminum alloy conductors. The electrical laboratory re-qualified the aluminum alloy core cable, and the connector company remade a new type of aluminum alloy connector for aluminum alloy core cable that has the same performance as the aluminum alloy core cable. After strict screening of aluminum alloy core cables, the American wire and cable company finally selected the 8000 series aluminum alloy and began to use it for manufacturing power cables for construction and other fields. Among them, the most widely used is AA-8176 aluminum alloy. It is also stipulated in the American specification that the relevant cable manufacturing must use the new alloy AA-8000 series electrical grade aluminum alloy material. In order to cooperate with and support wire and cable manufacturers, connector companies and electrical laboratories have actively carried out research and development work on connector technology suitable for AA-8000 series aluminum alloy conductors. Alloy connector products are widely used with aluminum alloy cables. The application of American alloy cables took only two years from the invention of product technology to the improvement of related mating connector technology and products.

In the 1980s, the American electrical industry, including the wire and cable industry, gained new development. Regarding product standards, regulations and technical specifications, electrical grade 8000 series aluminum alloy conductors have all been cited. In 1981, the American Society for Testing and Materials (ASTM) working group began to prepare AA-8000 series aluminum alloy conductor standards. In 1985, a proposal was put forward to include AA-8000 series aluminum alloy conductors in the Electrical Code. In the same year, the Underwriters Laboratories (UL) revised the UL83 standard to require the use of AA-8000 aluminum alloy conductors in most aluminum alloy core cables. In the fall of 1988, ASTM completed the technical specifications of the AA-8000 series of aluminum alloy conductors, and published the ASTMB-800 and ASTMB-801 standards. Since then, the AA-8000 series aluminum alloy has been officially used as a building wire and power cable conductor, and has been rapidly promoted around the world. This situation has continued to this day.

So the facts that users and related industry personnel must clearly understand are:

The United States and other countries have used aluminum alloy cables safely for decades. That is the successful result of the combined use and matching of aluminum alloy cables and aluminum alloy special connectors with the same cable performance.

Compared with the United States, the progress in the application of aluminum core cables in China is far behind. In the 1950s, copper prices rose at a high speed. The world's wire and cable industry proposed replacing aluminum with copper. To achieve the same electrical performance, the cross-sectional area of aluminum conductors needs to be one or two specifications or 50% larger than copper conductors. China is also affected by national conditions, resource conditions, political factors and other factors. In 1957, "aluminium replaced copper" has been identified as a class technology policy, but due to poor implementation and material technology, aluminum conductors have not been popularized. For many years, the Chinese have expected to develop a conductor that can utilize aluminum resources and continue to promote the replacement of copper with aluminum. However, they have never achieved a breakthrough in technology, and have therefore failed to achieve this historic revolution. In 2006 and 2007, the United States UMI Electric Company and Tianjin Jialu Company brought into the aluminum alloy cable technology and products originated from the United States, which made the people refreshed and started the domestic aluminum alloy cable business.

二、Aluminum alloy cable connection solution (the first problem in applying aluminum alloy cable)

(A) The correct connection scheme for aluminum alloy cables (a connection scheme that has been used in North America and other countries for nearly 50 years in the history of safe and accident-free use of aluminum alloy cables), that is, aluminum alloy cables must be connected with aluminum alloy connectors that are consistent with cable performance.

(B) Incorrect connection scheme for aluminum alloy cables. At present, when aluminum alloy cables are connected in China, aluminum connectors such as copper-aluminum transition terminals originally used for aluminum cables and aluminum alloy connectors with inconsistent cable performance are used as connection solutions. This connection scheme will leave hidden safety hazards, make the advantages and value of aluminum alloy cables disappear, and the application of aluminum alloy cables will become of no advantage and value.

Some domestic companies are promoting the incorrect connection scheme of aluminum alloy cables for their own benefit or do not understand the application characteristics of aluminum alloy cables at all. They are also doing everything possible to explain that aluminum connectors such as copper-aluminum transition terminals can be used to connect aluminum alloy cables. As we all know, the application of cables and safety issues are basically related to the connection. If aluminum connectors with hidden safety hazards are used in the connection of aluminum alloy cables, the application of aluminum alloy cables will have no advantages and value. This kind of disrespectful science, no consideration for user safety, and irresponsible behavior will eventually end in harming others.

A few fatal problems for non-aluminum alloy cable-specific connectors that are inconsistent with the performance of AA-8000 conductor cables (such as: copper-aluminum transition terminals and aluminum alloy connectors with inconsistent performance with AA-8000 conductor cables).

(1) Due to the presence of aluminum in the copper and aluminum transition terminals, all aluminum defects and deficiencies still exist. This type of terminal is used to connect aluminum alloy cables, so the advantages and values of aluminum alloy cables are lost. Use aluminum cable directly, because aluminum cable is more economical.

(2) Because the copper-aluminum transition terminal was originally used to connect aluminum cables, the terminal installation size did not match the size of the terminal equipment, which not only increased the cost of transferring the bronze medal, etc., but also transferred the bronze medal for multiple channels, which also left a hidden safety hazard.

(3) Due to the mismatch between the copper-aluminum transition connection terminal and the electrical terminal, the contradiction of costs often caused by the increase of the transfer of bronze medals, it is difficult to avoid the hidden danger of connection safety caused by brutal construction due to such problems that cannot be solved.

(4) Because the copper-aluminum transition terminal is originally used to connect aluminum cables, the inner diameter of this terminal does not match the outer diameter of the cable conductor. Special crimping tools must be used, making it difficult to standardize construction and leaving hidden safety hazards.

(5) At present, the purity of aluminum in various brands of copper-aluminum transition terminals used on the market can only be up to 99.5% (Note: the purity of general electrical aluminum is above 99.7%). In addition, the aluminum in the manufacture of copper-aluminum transition terminals is still industrial aluminum with solid conductivity and quenching treatment with relatively poor conductivity. Therefore, the overall conductivity of these copper-aluminum transition terminals can only be less than 54% IACS (Note: the conductive aluminum alloy is conductive The rate is required to be above 61% IACS), which causes the terminal to mismatch the electrical performance of the aluminum alloy cable. As a result, the transmission line resistivity increases by more than 21%, the line transmission capacity decreases by 21%, or the line loss increases by more than 21%.

As for other aluminum alloy terminals that are inconsistent with the performance of AA-8000 conductor aluminum alloys, due to the physical, mechanical, electrical, and compressive creep properties of their materials, the performance is different from that of AA-8000 conductor aluminum alloys. It is self-evident that the problems of safety hazards caused by the connection of alloy cables are self-evident.

Therefore, the second fact that users and related industry personnel must clearly understand is:

To ensure that the advantages and values of aluminum alloy cables are exerted and reflected, the premise of applying aluminum alloy cables safely and without risks is that aluminum alloy cables that meet the requirements of the standard plus matching aluminum alloy connectors with the same cable performance are used together.

The above problems of aluminum alloy cable connection application make us clearly realize that the quality of aluminum alloy cable is the basis, and the correct solution of aluminum alloy connector connection finally reflects the fundamental value of aluminum alloy cable application. Therefore, when purchasing and using aluminum alloy cables, the first problem is to choose the correct connection solution, and the second is the brand and price of the same level.

It is understood that one of the domestic domestic aluminum alloy cable technology product solution providers is the UMI aluminum alloy cable brand from the United States.

三、Use status, value and field of aluminum alloy cable and copper cable

1. Both cables have the same status

The cable manufacturing standard GB / T 3956-2008 "Conductors of Cables" and the use standards are the industry standards JGJ 242-2011 "Code for Residential Building Electrical Design" and JGJ48-2014 "Code for Store Building Design" issued by the Ministry of Housing and Urban-Rural Development. Cables have the same status as copper cables.

2. Both cables have the same use value

In addition to the different conductor materials, aluminum alloy cables and copper cables are superior to copper cables in terms of insulation, armoring methods, and production technology. The assessment conditions such as sheaths are the same as copper cables. The electrical properties of aluminum alloy cables are the same as copper cables by increasing the conductor cross section, and their mechanical properties are better than copper cables. Both cables have the same value.

3. For AA8000 series aluminum alloy cables, due to the characteristics of the conductor material and production process, it is suitable to manufacture power cables for distribution fields below 35KV voltage level, and the conductor section of aluminum alloy cables should be 16-500mm2. Since it cannot solve the problems such as matching aluminum alloy connectors, it is not suitable to manufacture wires for the field of wiring.

四、Standards for the manufacture and application of aluminum alloy cables

1. Cable manufacturing standards

In North America, etc., the manufacture of aluminum alloy cables is mainly based on American Standards ASTM B 800 05 (2011) and 801 07 (R2012) for production and inspection. In China, the current industry-specific manufacturing standard for aluminum alloy cables, "rated voltage 0.6 / 1kV aluminum alloy conductor cross-linked polyethylene insulated power cables," is yet to be promulgated. Before the introduction of special standards, the manufacture and inspection of aluminum alloy cables, except for the production and inspection of aluminum alloy armored cables with aluminum alloy armor, are mainly implemented with reference to copper cable standards such as GB / T 12706.1-2008. As for other special requirements of aluminum alloy cables, such as special properties of products such as flame retardant, smoke poison, and fire resistance, during production and inspection, aluminum alloy cables are referred to copper cable standards in accordance with the same standards.

From the above, the main reference standards for the manufacture of aluminum alloy cables are: American Standards ASTM B 800 05 (2011), 801 07 (R2012), and industry standards "rated voltage 0.6 / 1kV aluminum alloy conductor cross-linked polyethylene insulated power cables"

2. Conductor manufacturing standards

For the manufacture of aluminum alloy conductor materials, the manufacturing technology of most domestic manufacturers has not yet reached the requirements of ASTM B 800 05 (2011).

For the manufacture and inspection of aluminum alloy conductor materials in China, the newly issued national standard GB / T 30552-2014 "Aluminum alloy wire for cable conductors" is the most comprehensive and authoritative standard. Due to technical reasons, most domestic manufacturers fail to meet the requirements of ASTM B 800 05 (2011) and GB / T 30552-2014 "aluminum alloy wires for cable conductors" in the manufacture of aluminum alloy conductor materials. Can refer to GB / T 29920-2013 "Electric rare earth high-speed aluminum alloy rods" and the new version of GB / T 3954-2014 "Electrician round aluminum rods" standards, but because these standards have technical limitations, and American Standard ASTM B 800 05 ( 2011) and national standard GB / T 30552-2014 "aluminum alloy wire for cable conductors", there is a lack of general guidance.

The different technical standards of the implementation standards have caused the difference in quality of aluminum alloy cable products due to the uneven quality of the conductor materials in the market today.

3. Aluminum alloy cable application standards

The domestic aluminum alloy cable application related standards have been relatively complete. The industry standards JGJ242-2011 "Code for Electrical Design of Residential Buildings" and JGJ48-2014 "Code for Design of Store Buildings" issued by the Ministry of Housing and Urban-Rural Development, 10CD106 The local guidance standards and specifications such as the "Aluminum Alloy Cable Engineering Design, Construction and Acceptance Regulations" promulgated and implemented by provincial administrative departments such as the "Installation" level and provincial administrative departments, etc., already have substantial guidance value.

五、Determinants of Aluminum Alloy Cable Quality

1. The quality of the conductor aluminum alloy rod

The key to determining the quality of aluminum alloy cable is whether the quality of its conductor material is qualified and excellent. If the material of the conductor aluminum alloy rod is unqualified, the quality of the aluminum alloy cable will not be discussed. The quality of the conductor aluminum alloy rod material basically determines the quality of the final aluminum alloy cable manufactured from the objective conditions.

The basic judgment of the quality of aluminum alloy cable products is first of all the quality of the conductor aluminum alloy rod. The production method of aluminum alloy cable is different from the production method of copper cable. Because of the different properties of the conductor materials, manufacturers need to possess the core aluminum alloy core technology alloy formula, alloy melting technology, material continuous casting and rolling production equipment and mature production technology. The chemical composition of the produced conductor aluminum alloy rod material should first meet the requirements of the chemical composition of the AA-8000 series aluminum alloy specified in the standards of ASTM B 800 05 (2011), GB / T 30552-2014 "aluminum alloy wire for cable conductors" . Secondly, the mechanical properties meet the tensile strength of 98-159 MPa, the elongation after breaking is greater than or equal to 10%, the electrical properties are greater than or equal to 61% IACS, the material density is greater than or equal to 2.71 g / cm3, and the material should pass 100 hours of compression creep test. All conductor materials that meet the above requirements are qualified conductor materials for the manufacture of aluminum alloy cables.

2.Compressive creep properties of conductor aluminum alloy rod materials

Aluminum alloy cable is a new type of conductor cable invented due to frequent safety accidents in cable applications due to defects such as poor compression resistance of aluminum cables. One of the main advantages and values of aluminum alloy cables is that the compression creep resistance is much better than aluminum cables.

Whether the conductor aluminum alloy is excellent or not, compressive creep resistance is the most important evaluation condition. The compressive creep resistance directly reflects the value of aluminum alloy cables.

The proposed special standards for aluminum alloy cables "rated voltage 0.6 / 1kV aluminum alloy conductor XLPE insulated power cables" and GB / T 30552-2014 "aluminum alloy wires for cable conductors" clearly stipulate that the conductor aluminum alloy is resistant to compressive creep. The performance test must meet the 100-hour requirement. Some domestic manufacturers have only passed the compressive creep resistance test for 20 hours, which is far from the 100-hour requirement of the new national standard, which is difficult to reflect the true compressive creep resistance of the conductor material.

To examine whether the compressive creep performance of the conductor material is excellent, the rate of change of the compressive creep curve can be visually examined. The larger the rate of change, the worse the compressive creep performance.

Therefore, the third fact that users and related industry personnel must clearly understand is:

To evaluate the quality of aluminum alloy cables, the quality of the conductor aluminum alloy rod material should be evaluated first.

At present, the most outstanding performance of domestic conductor aluminum alloy materials is the professional aluminum alloy manufacturer that took the lead in bringing the mature and advanced aluminum alloy cable technology from the United States to China in 2006. Alloy rod material. Its excellent material properties are beyond the scope of all current aluminum alloy cable manufacturers in China who cast 2400 mm2 cast slabs of aluminum alloy rods.

六、Determinants of Aluminum Alloy Cable Life

Everyone in the market is widely publicizing that the service life of aluminum alloy cables is 10 years higher than that of copper cables. What is the basis? What is better than the technical guarantee of copper cable manufacturing? What are the advanced manufacturing processes that are better than copper cables? Many Manufacturers can't say clearly, let alone say they can do it.

We all know that the service life of a cable usually depends on the service life of the insulation. Increasing the service life of the insulation is the basis for improving the service life of the cable.

The key production links to solve the insulation life problem are mainly the following three points. This is an advanced process that is different from copper cable manufacturing and is conducive to greatly improving the insulation service life.

(1) Degree of insulation cross-linking; one of the advantages of aluminum alloy cables over copper cables is that all qualified aluminum alloy cables are insulated with cross-linked polyethylene, and the cable operating temperature is 90 degrees. Because of the use of cross-linked polyethylene insulation, there is a problem with the degree of cross-linking. Formal professional aluminum alloy cable manufacturers should have a special insulation cross-linking room to ensure complete cross-linking of the insulation.

(2) Stranded conductors: In terms of conductor twisting technology and conductor twisting production equipment, the current twisted conductor equipment of domestic aluminum alloy cable enterprises and copper cable enterprises is basically the same. Twisted conductors produced by this equipment usually produce aluminum shavings and burrs, damage the insulation, affect the insulation effect, cause hidden safety hazards and shorten the insulation life. In China, the most advanced stranded conductor equipment is a sub-motor type, PLC program controlled nanotechnology conductor stranded equipment. Using this advanced process equipment, microcomputer-controlled production programming, innovative nanotechnology, aluminum alloy conductors are produced. The surface has no aluminum shavings, no burrs, no oil stains, no unevenness, no scratches, and no scratches. It can most effectively ensure that the cable insulation is free of any damage and damage, and ensure that the product life is much longer than similar products.

(3) Conducting conductors into cables: Generally, the internal stress of the twisted conductors will be applied to the insulation after the conductors are twisted, which will cause long-term stress on the insulation, accelerate the insulation aging, and affect the service life of the insulation, thereby directly affecting the service life of the cable. This is one of the main reasons for the short service life of copper cables. American aluminum alloy cable production plants use the conductor-to-cable toughening process to solve internal stress problems. The cable forming and toughening process technology can further improve the electrical and mechanical properties of the product, and at the same time eliminate the internal stress generated during the conductor twisting process, effectively ensuring the life of the insulation. Therefore, whether the aluminum alloy cable manufacturing process adopts the cable forming and toughening process technology and whether the manufacturing plant has a conductor cable forming and toughening equipment are both critical to improving the cable's insulation life.

Therefore, the fourth fact that users and related industry personnel must clearly understand is:

It must be evaluated whether the manufacturer has a special insulation cross-linking room and advanced technology, whether the stranding of the conductor uses the most advanced nano-stranding technology and equipment guarantee, and whether the cable-forming toughening process technology and equipment guarantee are used. A truly professional aluminum alloy cable manufacturer must have these manufacturing technologies, processes and equipment.

It is understood that at present in the domestic aluminum alloy cable industry, only the United States UMI alloy cable brand stranded conductors from the United States use its unique and most advanced, sub-motorized, PLC program-controlled nanotechnology equipment and nanotechnology processes. The brand also has the above-mentioned other advanced process technologies and equipment.

七、Unique advanced armoring methods and equipment for aluminum alloy cables

One of the characteristics of the aluminum alloy cable is the aluminum alloy belt interlocking (chain) armoring method. The technology of this armoring method is far better than the steel tape wrapped armor of the copper cable. The use effect of the cable is also incomparable with the copper cable. of. But it is also the aluminum alloy belt interlocking (chain) armoring. There is also a large gap between the armoring equipment and production technology of domestic aluminum alloy cable manufacturers.

At present, domestic aluminum alloy armoring machine production line equipment is different, there are imported, imitation of imported technology, domestic equipment. The current status of imported equipment in the country is that in the selection of equipment, due to the lack of aluminum alloy cable production experience and consideration of equipment investment, the most advanced equipment was not selected, or used equipment was imported, or the mainframe was imported. The molds and so on are solved domestically, but the performance of imported equipment is not achieved. The products produced by this equipment have large wave crests and poor bending performance. The armor and the armor are structures lying on each other. The structure required by the United States technical standards cannot be achieved. The product has poor compression resistance and is easy to strip. As for the imitation of imported technology and domestic equipment, because the technology is immature, the armored products produced can be imagined. Because of these factors, the armored products produced by these equipments of domestic aluminum alloy cable manufacturers cannot meet the requirements of the US technical standards.

At present, the original UMI alloy cable brand in the United States has introduced the world's most advanced KALMARK chain armoring machine production line from Canada. The aluminum alloy chain chain armored cable developed in accordance with US technical standards has good crest density and good bending performance. The armor is a hook structure, and the special structure interlinked between the layers can ensure that the cable can withstand strong external forces. Even if the cable is subjected to large external pressure and external impact, the armor layer can protect the insulation. Layer electrical performance. The structure of the aluminum alloy non-magnetic armoring layer effectively improves the flame retardant level of the cable, greatly reduces the damage caused by the fire or the fire to the cable, and greatly reduces the cable eddy current loss. It truly reflects the quality and style of authentic American alloy cables.

Therefore, the fifth fact that users and related industry personnel must clearly understand is:

It is necessary to understand the technical level and production technology of the armoring equipment of the aluminum alloy cable manufacturer, whether the products produced are densely crested and have good bending performance. The structure between the armor and the armor is a hook.

八、Three main types of inspection reports for aluminum alloy cables

Class inspection report (one vote veto report): "Consistency judgment of aluminum alloy materials for conductors of aluminum alloy cables and copper-aluminum alloy transition terminals" inspection report.

Before purchasing aluminum alloy cable products, users should first check whether the supplier brand can provide the "consistency judgment of aluminum alloy cable conductors and copper-aluminum alloy transition terminal aluminum alloy materials" inspection report issued by an authoritative testing agency. If the supplier brand is unable to provide the report, a vote of veto can be given to the brand. Because when using aluminum alloy cable products, if there is no special aluminum alloy copper connection terminal with the same performance as that of aluminum alloy cable, the advantages and value of using aluminum alloy cable can be said to have disappeared. The application of aluminum alloy cable cannot guarantee safety, No hidden dangers. There is no special aluminum alloy copper connection terminal with the same performance as the aluminum alloy cable as the connection solution. In this way, the final effect of using the aluminum alloy cable is not as good as the direct use of the aluminum cable. At least the user understands that he is using the aluminum cable. , The maintenance program is more clear, and aluminum cables are cheaper.

The second type of test report (the key report to determine the quality of aluminum alloy cable conductors): "Conductor aluminum alloy rod full performance test report" and "Conductor aluminum alloy rod 100-hour compressive creep inspection report".

To see if the technology of an aluminum alloy cable brand is mature, it is also necessary to determine whether it has the authentic American standard ASTM B800 (R2011) and the national standard GB / T 30552-2014 "Aluminum alloy wire for cable conductors" series AA-8000 series aluminum alloy Ability of cable raw material conductor aluminum alloy rod. Whether all the properties of the conductor aluminum alloy rods produced by it meet the requirements of ASTM B800 (R2011) and national standard GB / T 30552-2014 "aluminum alloy wires for cable conductors" (whether the chemical composition meets the requirements of the AA-8000 brand. Mechanical properties Whether the medium tensile strength reaches 98-159Mpa, whether the elongation after breaking is greater than or equal to 10%. Whether the electrical conductivity in electrical properties reaches 61% IACS or above, and the material density is greater than or equal to 2.71g / cm3). Is the compressive creep curve comparable to the compressive creep curve of copper conductors?

The quality of the aluminum alloy cable's raw material conductor determines the quality of the aluminum alloy cable conductor. If the quality of the raw material conductor aluminum alloy rod is unqualified and not excellent, the conductor of the aluminum alloy cable will be difficult to pass and excellent, and the cable quality cannot be guaranteed. The user should know whether the supplier has the ability to produce raw material conductor aluminum alloy rods and check whether the supplier's conductor aluminum alloy rods have obtained the "Conductor Aluminum Alloy Rod Full Performance Test Report" and "Conductor Aluminum Alloy" 100-Hour Compressive Creep Inspection Report. " These two reports can directly prove the quality of the conductive aluminum alloy raw materials of the supplier. If the conductive aluminum alloy raw material is unqualified, the supplier cannot produce qualified aluminum alloy cable products. As for providing other so-called product test reports, there is no reference and proof value.

The third type of test report: type test report (comprehensive cable performance test) and commissioned test report (single performance test)

Under the premise of the above two types of reports, users can check the third type of aluminum alloy cable type test reports issued by authoritative testing agencies. The cable type test report can reflect the comprehensive performance of cable conductors, insulation, and jackets. It is the most comprehensive test report for the comprehensive performance of the finished cable. It is a report that the finished cable must have in the market. As for the individual performance tests such as flame retardancy, current carrying capacity, fire resistance, halogen-free low smoke, etc., they are generally commissioned by manufacturers to conduct inspections, and inspections are performed as needed. When users check this type of test report, they should first check the cable type test report of the supplier, which is a comprehensive report of cable performance. According to the individual performance requirements of the cable, check the corresponding test report of the nature of the commissioned inspection.

Other so-called industry evaluation reports that many manufacturers have advertised or what industry products have passed the identification and what century-old history cannot be verified, in fact, can not prove the quality and quality of the aluminum alloy cable products actually produced by these manufacturers and the Whether the connection solution is correct.

As everyone knows, what users need and buy is the correct connection solution and qualified aluminum alloy cable products that can give full play to the advantages and value of aluminum alloy cables and safely and without hidden dangers. Unadjusted publicity gimmick.

九、Three factors for choosing aluminum alloy cables: complete set, quality, and cost performance.

Aluminum alloy cable, a new technology and product from the United States, has a great potential in the Chinese market today, but for how to properly choose aluminum alloy cables, apply aluminum alloy cables safely and without hidden dangers, and promote the aluminum alloy cable industry towards science The development in a healthy direction. Based on our experience in applying aluminum alloy cables, we share the following with the industry and users:

It is well known in the industry that in the application of aluminum alloy cables, the good quality of aluminum alloy cables is the basis, and the choice of matching aluminum alloy connector connection solutions that are consistent with the cable performance is the ultimate basis for the application value of aluminum alloy cables. Therefore, when choosing an aluminum alloy cable, first select a full set of production with cables and supporting aluminum alloy connection accessories, provide the right connection technology solution capabilities, suppliers with excellent product quality and comprehensive cost-effectiveness, and then consider the price difference of the brand at the same level.

 

What is aluminum wire?

 

Aluminum wire is a silver-white light metal.Aluminum wire has ductility and ductility.Products are often made in the shape of rods, flakes, foils, powders, ribbons and filaments.It can form an oxide film to prevent metal corrosion in humid air.

Aluminum powder and aluminum foil can burn violently when heated in air, and emit a dizzying white flame.Aluminum wire is easily soluble in dilute sulfuric acid, nitric acid, hydrochloric acid, sodium hydroxide and potassium hydroxide solution, and insoluble in water. The relative density is 2.70. Melting point is 660 ° C. The boiling point is 2327 ° C.

The content of aluminum in the earth's crust is second only to oxygen and silicon, ranking third, and is the most abundant metal element in the earth's crust. The development of the three major industries of aeronautics, construction, and automobiles requires that the material properties have the unique properties of aluminum and its alloys, which greatly benefits the production and application of this new metal, aluminum. The application is extremely extensive.


Inner Mongolian Aluminum Rod | Nine Tips for Identifying the Authenticity of Aluminum Alloy Cables


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