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Regarding the size range of C27400 copper wire, its diameter can range from very small specifications (such as 0.1 mm) to larger specifications (such as 40 mm) according to different application requirements. In some precision machining fields, the diameter of C27400 copper wire can reach 18 microns to 50 microns, and can even be expanded to larger sizes according to needs. In addition, according to specific uses, its length can also be customized, usually to meet actual needs.
In terms of international standards, the international grade corresponding to C27400 copper wire is CuZn37, and its equivalent standards include ISO, ASTM, EN, etc. For example, the performance requirements of C27400 copper alloy are clearly mentioned in the ASTM B135/B135M-2017 standard. In addition, C27400 copper wire also meets the relevant provisions of the German standard DIN 62 and the Russian standard GOST.
C27400 copper wire is a widely used low-phosphorus brass material, whose size range and international standards cover application requirements from micron to millimeter level, and meet the requirements of multiple international and national standards.
Chemical composition (mass percentage)
Copper (Cu): 61%-64%
Zinc (Zn): Balance (about 35%-39%)
Lead (Pb): ≤0.10% (some data suggest 0.08%-0.5%, but most limit to ≤0.1%)
Iron (Fe): ≤0.05%-0.15%
Other elements (such as nickel, tin, aluminum, etc.): Total ≤0.5%
Mechanical properties are significantly affected by processing state (such as soft state, hard state, hot state, etc.), and typical values are as follows:
Tensile strength (σ₆)
Soft state (M): ≥290 MPa (such as annealed state)
Hard state (H80): 510 MPa (about 74 ksi)
General standard: 220-585 MPa (depending on processing state)
Yield strength (σ₀.₂)
Soft state: ≥160 MPa
Hard state (H80): 379 MPa (about 55 ksi)
Other states: 28-48 ksi (about 193-331 MPa)
Elongation (δ)
Soft state: ≥30%
Hard state: 10%-15%
Semi-hard state: ≥15%-20%
Hardness
Vickers hardness (HV): 85-175 (depending on state)
Rockwell hardness (HRB) ：10-20
Other properties
Electrical conductivity: 27%-30% IACS (lower than pure copper, but better than most alloys)
Thermal conductivity: 67-138 W/(m·K)
Density: 8.7 g/cm³
Production process and product advantages of C27400 copper wire:
1. Production process
Raw material preparation: The production of C27400 copper wire uses brass alloy as the main raw material, and its chemical composition mainly includes about 62%-65% copper (Cu), 0.5% nickel (Ni), 0.15% iron (Fe), 0.08% lead (Pb) and a small amount of zinc (Zn) and other impurities.
Wire drawing process: The production process of copper wire includes rough drawing and unwinding, mechanical shelling, cold water washing, hot water washing, boron coating, lead plating, drying, plating assistance, wire drawing, stranding, and rope closing. Among them, the wire drawing process is the key link, and the copper material is processed into copper wires of different diameters through wire drawing machines and molds.
Twisting and braiding: During the production process, the copper wire will undergo bundle twisting, extrusion, pair twisting and single twisting processes, and finally form a finished product through the sheath extrusion process.
Heat treatment and annealing: In order to improve the mechanical properties and processing properties of copper wire, annealing is usually required to reduce hardness and improve plasticity.
2. Product advantages
Excellent corrosion resistance: The addition of zinc and tin to C27400 copper alloy significantly improves its corrosion resistance, making it perform well in dry air and weakly acidic environments, but it should be noted that additional protective measures may be required in complex environments such as seawater.
Good processing performance: C27400 copper wire has good processability and is suitable for hot and cold processing processes, including forging, stamping, welding and cutting, which makes it an ideal material for manufacturing precision parts.
High strength and ductility: The tensile strength of C27400 copper alloy can reach 220 MPa, the yield strength is 160 MPa, and the elongation exceeds 10%, which makes it excellent when subjected to mechanical stress.
Price advantage: Compared with other brasses, C27400 copper alloy has a lower cost, making it more economical in a wide range of applications.
Wide range of applications: Due to its excellent comprehensive performance, C27400 copper wire is widely used in manufacturing, plumbing, electronics and construction industries to manufacture machine parts, electronic equipment structural parts, connectors, door and window accessories and decorative materials, etc.
Q1:Do you provide samples? Is it free or extra?
A1:Yes, we can provide samples free of charge and the customer will pay the freight.
Q2:What if I don't have export experience ?
A2:We have reliable forwarder agent which can ship items to you by sea/air/Express to your doorstep. Any way, we will help you choose the most suitable shipping service.
Q3:How long is your lead time?
A3:If it is in stock, it is usually 5-10 days. Or, if there is no inventory, 15 days, depending on the quantity.
Q4:What are your terms of payment?
A4:30% T/T deposit in advance, 70% T/T balance within 5 days after B/L copy, 100%.Irrevocable L/C at sight, 100% Irrevocable L/C after receive B/L 30-120 days, O/A.
Q5:How is your technical support?
A5:We provide lifetime online support through Whatsapp/ Skype/ Wechat/ Email. Any problem after delivery, we will offer you call anytime.
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