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Detailed size range
Diameter/side length range:
Round bars: 1.5-500 mm diameter (mentioned, suppliers can provide very fine to coarse specifications).
Square bars: Common sizes include 0.75 inches (19.05 mm), 1 inch (25.4 mm), 2 inches (50.8 mm), with tolerances of ±0.0045 inches and ±0.005 inches respectively.
Length: Standard length is 12 feet (about 3.66 meters), but can be customized up to 6000 mm on demand.
Other shapes: hexagonal bars, rectangular bars, strips, etc.
International standards
Main standards:
ASTM B21/B21M-20: Covers the production requirements of naval brass bars, strips and shapes, and explicitly includes C4640.
ASME standards: such as SB171 (plates for condensers), B124 (forgings), etc.
SAE standards: J461, J463 (bars and shapes).
Other certifications: SGS certification (quality and safety assurance).
Tolerances and testing: Must comply with ASTM B21 dimensional tolerances (e.g. ±0.0045 inches), mechanical property tests (tensile, hardness, etc.) and chemical composition requirements.
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%.
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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