H80 Brass

Designation and Standards

• Standard Designation: H80 (Common Brass)

• International/National Standards: GB/T 2041-1989 (Plates, Strips, etc.)

• Material Category: Copper-Zinc Alloy (Cu-Zn), Copper Content 79.0%-81.0%, Zinc as the remainder.

Product Features

• Balanced Strength and Plasticity: Tensile strength ≥265 MPa, elongation ≥50%, with excellent cold and hot working ability.

• Superior Corrosion Resistance: Good resistance to freshwater and atmospheric corrosion. For seawater environments, corrosion control is necessary (corrosion rate 0.0075-0.1 mm/a).

• Wide Processing Adaptability: Supports cold rolling, hot rolling, welding, and other processes, suitable for manufacturing thin wall pipes and corrugated pipes.

• Stress Corrosion Sensitivity: Low-temperature annealing (260℃) after cold working is required to relieve internal stress and prevent cracking.

Common Product Forms and Specifications

Product Form	Specification Range	Typical Application
Plate	Thickness 0.2-100mm, Width 305-1000mm	Architectural decoration, instrument casings
Strip	Thickness 0.01-2.0mm, Width 4-600mm	Electronic components, metal filters
Tube	Outer Diameter 1-600mm, Wall Thickness 0.1-100mm	Condenser tubes and radiators
Wire	Diameter 0.01-15.0mm	Welding wires, spring components
Bar	Diameter 1.0-200mm, Length 2500-6000mm	Mechanical Structural Parts

Chemical Composition

Element	Cu	Zn	Pb	Fe	Total Impurities
Content (%)	79.0-81.0	Remainder	≤0.03	≤0.10	≤0.3

Physical Properties

Property	Value	Test Condition
Density	8.66-8.67 g/cm³	Normal temperature
Thermal Conductivity	140.2-141.7 W/(m·℃)	Similar to Pure Copper
Coefficient of Thermal Expansion	19.1×10⁻⁶/℃ (20-300℃)	Reference Value for Thermal Stability
Melting Point	966-1001℃	Alloy Melting Range
Electrical Conductivity	32% IACS (Soft State)	Lower than Pure Copper

Mechanical Properties

Property	Value	Test Condition
Tensile Strength (σb)	≥265 MPa	Plate (Thickness ≥0.5mm)
Elongation (δ10)	≥50%	M, High Ductility
Hardness	Medium (Exact Value Not Specified)	Refer to Common Brass Hardness Range
Hot Working Temperature	820-870℃	Recommended Processing Temperature
Annealing Temperature	600-700℃ (Conventional Furnace Annealing)	Eliminate cold work hardening

Core Advantages

• Outstanding Comprehensive Performance: Balanced strength, plasticity, and corrosion resistance, suitable for complex processing.

• High Environmental Corrosion Resistance: Excellent service life in freshwater and atmospheric conditions, superior to common carbon steel.

• Versatile Forms: Available in plates, tubes, wires, and more , adaptable to industrial customization needs.

Main Application Fields

• Construction Industry: Decorative fittings, plumbing parts, metal filters.

• Electronics: Waveguides, instrument casings, heat dissipation components.

• Marine and Automotive: Condenser tubes, heat exchanger tubes (corrosion control is essential in seawater).

• Paper Industry: Corrugated tubes, paper-making screen materials.

Processing Considerations

• Hot Working Control: Avoid exceeding 870℃ to prevent zinc volatilization, which may reduce performance.

• Stress Relief: Low-temperature annealing at 260℃ after cold working is recommended to reduce stress corrosion cracking risks.

• Welding Process: Argon protected welding is recommended to minimize porosity defects.

Frequently Asked Questions

Q: What is the difference between H80 and Copper (T2)?

A: H80 is brass (Copper-Zinc Alloy) with higher strength and lower cost, while T2 material is pure copper (Cu≥99.9%) with superior electrical conductivity but lower strength.

Q: Is H80 suitable for seawater environments?

A: It is not recommended for direct use in seawater due to its corrosion rate (0.0075-0.1 mm/a). Protective coatings are suggested for extended service life.

Q: What is the typical color of H80?

A: H80, with approximately 80% copper, has a light yellow color, noticeably different from the darker yellow of Alpha Brass like H62.

Standard References

• Chemical Composition and Processing Standards: GB/T 2041-1989 (Plates), GB/T 5232-1985 (Wrought Brass).

• Mechanical Property Testing: Refer to GB/T 228.1 (Metal Tensile Test).

Note: The above data is compiled from multiple industrial standards and technical documents. Actual performance may vary depending on production processes and testing conditions. Refer to the supplier's test report for specific values.