H63 Brass

Designation and Standards

Standard Designation: H63 (Common Brass)
International/National Standards: GB/T 5231-2012, GB/T 2059-2000 (Strips)
Equivalent International Grades: American Standard C27200, Japanese Standard C2720
Material Category: Copper-Zinc Alloy (Cu-Zn), Copper Content 62.0%-65.0% and zinc as the balance.

Product Features

Excellent Ductility: Exhibits good plasticity in both hot and cold conditions, making it suitable for deep drawing, bending, and other complex forming processes.
Balanced Strength and Workability: Tensile strength is ≥370 MPa; excellent performance in both cold and hot working , and supports welding, soldering and brazing, and other processes.
High Cost-Effectiveness: Low cost, making it one of the most widely used common brasses.
Limited Corrosion Resistance: Performs well in freshwater and atmospheric environments, but is prone to corrosion cracking in seawater or high-stress environments (corrosion rate approximately 0.1 mm/a).

Common Product Forms and Specifications

Product Form	Specification Range	Delivery Condition
Plate	Thickness: 0.2–100 mm, Width: 305–1000 mm	R (Hot Rolling), M (Annealed), Y (Hard )etc.
Strip	Thickness: 0.01–3.0 mm	M, Y2 (1/2 Hard), etc.
Tube	Outer Diameter: 6–530 mm, Wall Thickness: 0.5–50 mm	M, 1/2 Hard
Bar	Diameter: 4–350 mm, Length: 2500–6000 mm	Black Round and Bright drawn Bars
Wire	Diameter: 0.1–12.7 mm	Coils or Straight Rods

Chemical Composition

Element	Content (%)
Cu	62.0–65.0
Zn	Balance
Pb	≤0.03–0.08
Fe	≤0.07–0.15
Total Impurities	≤0.3–0.5

Physical Properties

Performance Parameter	Value	Remarks
Density	8.43–8.47 g/cm³	Advantage for lightweight design
Electrical Conductivity	Approximately 24% IACS (soft state)	Lower than pure copper; meets general conductivity requirements
Thermal Conductivity	116.7–123 W/(m·K)	Close to pure copper; suitable for heat dissipation components
Coefficient of Linear Expansion	20.6×10⁻⁶/℃ (20–300℃)	Good thermal stability
Elastic Modulus	105 GPa	Material rigidity index

Mechanical Properties

Performance Parameter	Value	Test Condition
Tensile Strength (σb)	≥370 MPa	Longitudinal room temperature tension test on bars
Elongation (δ10)	≥15%	Typical value(Y)
Hardness (HV)	55–190	Varies significantly with processing state
Annealing Temperature	520–650℃(Conventional Furnace Annealing)	Eliminate cold work hardening

Core Advantages

Balanced Overall Performance: Offers excellent plasticity (among the best in brasses) and moderate strength, making it suitable for complex forming requirements.
Economic and Practical: Lower in cost compared to Alpha Brass Alloy (such as H68), making it ideal for large-scale production.
Diverse Forms: Available in various forms including plates, tubes, wires, etc., which meets customized industrial needs.

Product Applications

Machinery Manufacturing: Suitable for pins, rivets, washers, nuts, and other load-bearing parts.
Electronics and Electrical: Used in heat sink components, electrical terminals, and pressure gauge springs.
Construction and Shipbuilding: Employed in decorative grilles and water piping components (with necessary seawater protection).
Sugar and Paper Industries: Applied in sugar machinery components and metal screens for papermaking.

Processing Considerations

Annealing Treatment: After cold working, annealing at 520–650℃ is required to relieve internal stresses and prevent stress corrosion cracking.
Welding Process: Argon protected welding is recommended to reduce porosity defects caused by zinc evaporation.
Corrosion Protection: Avoid direct use in seawater environments; use protective coatings or opt for Corrosion-Resistant Alloys (such as H68A).

Frequently Asked Questions

Q: What is the difference between H63 and H62 brass?

A: H63 has a higher copper content (62%–65% vs. H62's 60.5%–63.5%), offering superior ductility ideal for deep drawing components, whereas H62 provides higher strength at a lower cost.

Q: How is the corrosion resistance of H63 in seawater?

A: The corrosion rate is approximately 0.1 mm/a. It is recommended to add a protective coating or choose Arsenical Brass (such as H68A).

Q: What are the typical application cases for H63?

A: It is widely used in pins, heat sink components, sugar machinery parts, and decorative elements in construction.

Standard References

Chemical Composition and Processing Standards: GB/T 5231-2012, GB/T 2059-2000.
Mechanical Properties Testing: GB/T 228.1 (Metal Tensile Testing).
International Standard: ASTM B36 (General Standard for Plates).

Note: The above data are consolidated from multiple industrial standards and technical documents. Actual performance may vary slightly due to production processes and testing conditions. Please refer to the supplier's test report for detailed specifications.

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