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The diameter range of C46400 copper wire varies according to application requirements and production standards:
Single wire specifications:
Bare copper wire or tinned copper wire, diameter range 0.10-0.80 mm
Extended specifications:
A wider diameter range of 0.1-3 mm is available, suitable for special needs such as wire, welding rod, etc.
International standards
C46400 copper wire follows the following international standards:
ASTM standards:
ASTM B21: Specification for naval brass bars, rods and shapes, covering the mechanical properties and chemical composition of C46400.
ASTM B124: Applicable to forged copper alloy bars, including cold-worked products of C46400.
ASME standards:
ASME SB-171: Copper alloy plates for pressure vessels and condensers, indirectly related to the process of processing C46400 plates into wire.
Government standards:
QQ-B-637: Clarifies the technical requirements for C46400 wire, bars and forgings.
Chemical composition
Copper (Cu): 59.0%–62.0% (core component)
Tin (Sn): 0.5%–1.0% (key additive, improving corrosion resistance)
Zinc (Zn): balance (about 37.5%–39.25%)
Lead (Pb): ≤0.20% (improves processability)
Iron (Fe): ≤0.10% (impurity limit)
Other trace elements: extremely low or undetectable content of aluminum, manganese, nickel, etc.
Normal state (not heat treated)
Tensile strength: 345–607 MPa
Minimum value: 345 MPa (annealed state)
Typical value: 379–450 MPa
Maximum value: 605 MPa (cold worked state)
Yield strength: 125–455 MPa
Annealed state: 125–140 MPa
Cold worked state: 455 MPa
Elongation: 15%–50%
Annealed state: 35%–50%
Cold worked state: 15%–18%
Hardness: 80–200 HB (Brinell hardness)
Annealed state: 80 HB
Hard state: 200 HB
Specially treated state
Hardened treatment: tensile strength up to 900 MPa, yield strength 490 MPa, elongation 15%.
Production process and product advantages of C46400 copper wire:
Production process
The production process of C46400 copper wire mainly includes the following steps:
Pretreatment:
Preheating: Preheat the electrolytic copper plate (80~150℃), remove surface moisture, and use natural gas for heating.
Rough drawing and wire laying: The copper rod is laid out through the wire rack to prepare for subsequent processing.
Surface treatment:
Mechanical shelling to remove the oxide layer, followed by electrolytic pickling, cold water washing, hot water washing and other cleaning steps.
Boron coating treatment: Enhance the surface lubricity of the copper wire to facilitate subsequent wire drawing.
Wire drawing forming:
Multi-pass wire drawing process, gradually draw the copper rod into copper wire of the required diameter (single wire specification is usually 0.10-0.80mm).
Post-processing:
Lead plating: Lead plating is required in some processes to improve corrosion resistance.
Twisting and rope closing: Multiple strands of copper wire are twisted through a wire bundling machine, then formed by a rope closing machine, and finally inspected and packaged.
Product Advantages
Due to its unique composition (Cu 59-62%, Sn 0.5-1.0%, Zn balance) and process design, C46400 copper alloy has the following advantages:
Excellent corrosion resistance:
The addition of tin significantly improves the corrosion resistance to seawater, especially in high temperature or high salinity environments, and has strong resistance to dezincification.
Excellent mechanical properties:
Tensile strength can reach 380-600 MPa, yield strength 170-450 MPa, elongation 6-50%, with both high strength and good plasticity.
Outstanding fatigue resistance, wear resistance and stress corrosion cracking (SCC) resistance.
Excellent processing performance:
Excellent hot processing performance, suitable for forging, rolling, extrusion and other forming processes; annealing can also be used to optimize performance during cold processing.
Good welding performance, supporting a variety of connection methods such as soft soldering and silver soldering.
Electrical and thermal conductivity:
Thermal conductivity is 121 W/m·K, and the electrical conductivity is 26% IACS (International Annealed Copper Standard), suitable for electrical systems and heat exchangers.
Wide range of applications:
Ship industry: key components such as propeller shafts, valves, condenser tubes, hull hardware, etc.
Aerospace and automotive: aircraft joints, bolts, nuts, automobile exhaust pipes, etc.
Electronics and energy: wires, cables, motor copper wires, etc., thanks to its electrical conductivity and corrosion resistance.
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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