H62 Brass

Designation and Standards

Standard Designation: H62 (Common Brass)
International/National Standards: GB/T 5231-2012 (Wrought Brass), GB/T 4423-2007 (Bars)
Corresponding International Designations: ASTM C27400, JIS C2801
Material Category: Copper-Zinc Binary Alloy (Cu-Zn), Copper content 60.5%-63.5%, Zinc as the remainder.

Product Features

1. High Strength and Plasticity Balance:

Tensile strength ≥ 330 MPa, elongation ≥ 10% (in the hard state), excellent cold/hot working performance.

Suitable for processes such as stamping, drawing, forging, etc.

2. High Cost-Effectiveness: Low cost, one of the most widely used common brasses.

3. Corrosion Resistance: Good corrosion resistance in freshwater and atmospheric conditions, but prone to stress corrosion cracking in seawater or ammonia-containing environments.

4. Wide Processing Adaptability: Supports cold rolling, hot rolling, welding, but annealing is required after cold processing to avoid stress concentration.

Chemical Composition

Element	Cu	Zn	Pb	Fe	Total Impurities
Content (%)	60.5-63.5	Remainder (approx. 36.5%-39.5%)	≤0.08	≤0.15	≤0.5

Physical Properties

Property Parameter	Value	Remarks
Density	8.43-8.47 g/cm³	Lightweight design advantage
Conductivity	Approx. 22% IACS	Meets general conductivity requirements
Thermal Conductivity	115-120 W/(m·K)	Suitable for heat dissipation components
Linear Expansion Coefficient	20.6×10⁻⁶/℃（20-300℃）	Good thermal stability
Melting Point	905-930℃	Good casting fluidity

Mechanical Properties

Property Parameter	Value	Testing Conditions
Tensile Strength (σb)	330-600 MPa	Significant variation depending on the processing state (M/Y)
Elongation (δ10)	≥10% (hard state)	Can reach 45% in soft state
Hardness (HB)	80-110	Higher hardness in the hard state
Annealing Temperature	550-650℃ (normal annealing)	To eliminate work hardening

Common Product Forms and Specifications

Product Form	Specification Range	Standard/Condition
Plate	Thickness 0.2-100mm, Width 305-1000mm	Hot rolled (R), Soft (M), Hard (Y)
Strip	Thickness 0.1-3.0mm	M, Y₂, Y, etc.
Pipe	Outer diameter 6-530mm, Wall thickness 0.5-50mm	Cold worked or semi-hard state
Bar	Diameter 5-200mm, Length 2500-6000mm	Drawn round, black surface round
Wire	Diameter 0.5-12.7mm	Coiled or straight bars

Core Application Fields

Building Hardware: Door and window fittings, locks, plumbing fittings.
Electronics and Electrical Appliances: Heat exchangers, conductive terminals, switch contacts.
Mechanical Manufacturing: Screws, rivets, washers, stamped parts.
Decorative Materials: Metal mesh, decorative strips, crafts.
Industrial Equipment: Condenser tubes, heat exchangers (must be protected from seawater corrosion).

Processing Considerations

Annealing Process: Requires annealing at 550-650℃ after cold working to eliminate internal stress and prevent cracking.
Welding Requirements: Preferably use argon arc welding to reduce the zinc evaporation and pore defects.
Corrosion Protection: Avoid direct exposure to seawater or ammonia environments; it is recommended to add a coating or plating.

Frequently Asked Questions

Q: What is the difference between H62 and H59 brass?

A: H62 has a higher copper content (60.5%-63.5% vs. H59's 57%-60%), offering better plasticity, making it suitable for complex processing. H59 has slightly lower strength but is more cost-effective.

Q: Is H62 suitable for seawater environments?

A: It is not recommended for direct use, as the corrosion rate is relatively high (around 0.1-0.15 mm/a). It is recommended to add a coating or use a corrosion-resistant alloy (such as HSn62-1 tin brass).

Standard References

Chemical Composition and Processing Specifications: GB/T 5231-2012, GB/T 4423-2007 (Bars).
Mechanical Property Testing: GB/T 228.1 (Metal Tensile Testing).
International Standards: ASTM B36 (Plate), JIS H3250 (Japanese Standard).

Note: The above data is compiled from various industrial standards and technical documents. Actual parameters may vary slightly due to production processes. Please refer to the supplier's test report for specific details.

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