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Size Range
Diameter: Drawn rods range from 3mm to 500mm in diameter, depending on the production process (extrusion or drawing).
Length: Standard lengths up to 30 meters, custom cuts available.
Tolerances: For example, a 10mm diameter copper rod has a tolerance of ±0.0045 inches (approximately ±0.11mm), and length tolerances vary depending on the application.
International Standards
ASTM Standards:
ASTM B21: Specifies the chemical composition and mechanical properties of copper alloy rods.
ASTM B111/B111M: Corrosion resistance and dimensional requirements for C44300 tubes and rods, particularly for heat exchangers.
European Standard: EN 12163:2011 covers the manufacturing and testing requirements for copper alloy rods.
Chinese Standard:
GB/T 4423-2007: Specifies the dimensional tolerances and surface quality of drawn copper rods, with a minimum diameter of 3mm.
GB/T 5231-2012: defines the grades and compositions of processed copper alloys, corresponding to C44300.
Copper (Cu): 69.0% - 73.0% (most literature supports 69.0% - 71.0%, but some standards such as EN give 70.0% - 73.0%).
Tin (Sn): 0.8% - 1.3%, used to enhance corrosion resistance.
Zinc (Zn): Balance, usually 25% - 29%.
Arsenic (As): 0.02% - 0.06%, inhibits dezincification corrosion.
Impurities: Lead (Pb) ≤ 0.05%, Iron (Fe) ≤ 0.10%, Nickel (Ni) ≤ 0.5%, Total impurities ≤ 0.3%.
Physical Properties
Density: 8.53 g/cm³ (most sources), 8.3 g/cm³ in some sources.
Melting Point: Liquidus 940°C (1720°F), Solidus 900°C (1650°F).
Thermal Conductivity: 64 - 110 W/m·K.
Electrical Conductivity: 25% - 28% IACS (International Annealed Copper Standard).
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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