1.What is the application of C60800 copper?
Power and Electronics Industry
Power transmission components: It is an ideal material for high-voltage switch contacts, which can achieve an electrical life of up to 100,000 cycles. It is also applied to substation grounding grids, as it can resist soil corrosion and maintain stable performance for a long time. In addition, it is used to make slip ring assemblies for wind turbines, with a contact resistance of less than 0.5 mΩ, ensuring efficient power transmission.
Electronic packaging parts: Its thermal conductivity of 180 W/(m·K) makes it suitable for high-power LED substrates. It is also used for RF connector housings (with a cutoff frequency of up to 40 GHz) and semiconductor device carriers, which have a high-temperature dimensional change of less than 0.01%, meeting the precision requirements of electronic components.
Aerospace and Transportation
Aerospace field: It is used to manufacture aircraft structural parts, engine components, connectors, and fasteners. These components need to maintain stability and reliability under extreme temperature and pressure conditions, and the high hardness and corrosion resistance of C60800 copper can meet such harsh requirements. It also can be used for electromagnetic shielding of spacecraft, with a shielding effectiveness of more than 120 dB.
Automotive and rail transit: In automotive manufacturing, it is used to produce suspension components, transmission system parts, and brake system components, which can withstand high loads and high temperatures. In rail transit, it is applied to collector rails of maglev trains, with a wear rate of less than 0.1 mm per 1,000 km.
Marine and Chemical Engineering
Marine engineering: It is widely used to make key corrosion-resistant components for ships, such as propellers, seawater pump shafts, and valve seats. Its seawater corrosion resistance is more than five times that of ordinary brass, which can adapt to the long-term salt-spray corrosion environment at sea.
Chemical equipment: It is suitable for manufacturing centrifugal pump impellers, agitator shafts, condensers, and evaporators in chemical equipment. It can resist corrosion from sulfuric acid, alkaline media, and other chemical substances, ensuring the long-term stable operation of equipment in corrosive environments.
Industrial Machinery
It is commonly used to produce key components of industrial machinery that bear high loads and friction, such as gears, bearings, guide rails, and bearing sleeves of rolling mills. With a hardness of 160 - 220 HB and a low friction coefficient, it can maintain good performance in high-load and high-friction environments. It is also used for mining crusher liners, which can adapt to high-impact load working conditions.
2.What are the execution standards for C60800 copper?
Core ASTM Standards
ASTM B111M: This standard focuses on copper alloy tubes, including C60800 copper tubes. It specifies the manufacturing processes such as vacuum deoxidation (requiring oxygen content less than 5 ppm) and thermomechanical treatment for C60800 tubes. It also regulates the testing requirements for their corrosion resistance, electrical conductivity, and surface quality. For example, the surface roughness can be reduced to Ra 0.05 μm through electrolytic polishing.
ASTM B150/B151: These are forging copper alloy standards. They define C60800 as a low-aluminum bronze alloy and specify the processing requirements for its forged products, such as forging temperature and post-forging heat treatment procedures, to ensure that the forged parts meet the required strength and toughness.
Key Requirements under the Standards
Chemical composition: The standards clearly stipulate the ingredient range of C60800. Generally, the aluminum content is 5.0%-9.0% (some specific process requirements control it at 6.0±0.2%), the iron content is 0.8%-1.2% or ≤0.50% depending on product scenarios, copper accounts for the balance, and the total content of other impurities shall not exceed 0.15%.
Mechanical properties: According to relevant standard regulations, the tensile strength of C60800 copper is not less than 550 MPa, and the yield strength is not less than 250 MPa. It can maintain 90% of the room-temperature strength at 300°C, and its high-temperature strength loss rate is less than 10% when working below 400°C for a long time.
Heat treatment specifications: The standards also involve heat treatment requirements. For example, solution treatment requires water quenching at 900 - 950°C, and aging treatment needs to be kept at 450 - 500°C for 4 - 6 hours. For stress relief, two-stage annealing can be adopted: 550°C for 1 hour and then 400°C for 4 hours for stabilization.
