Material Designation & Classification
Primary Standard: GB/T 5231 (China)
Alloy Type: Alpha-Beta (α+β) Brass
Common Names: H62 Brass, 60/40 Brass, Muntz Metal-type alloy
UNS Designation: Approximately C28000
ISO Designation: Approximately CuZn38 (CW508L)
Chemical Composition
| Element | Minimum (%) | Maximum (%) | Typical (%) |
|---|---|---|---|
| Copper (Cu) | 60.5 | 63.5 | 62.0 |
| Lead (Pb) | - | 0.08 | <0.05 |
| Iron (Fe) | - | 0.15 | <0.10 |
| Antimony (Sb) | - | 0.005 | - |
| Bismuth (Bi) | - | 0.002 | - |
| Phosphorus (P) | - | 0.01 | - |
| Zinc (Zn) | Balance | Balance | ~37.8 |
| Impurities Total | - | 0.5 | - |
Typical Mechanical Properties
| Condition / Temper | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HV) |
|---|---|---|---|---|
| Annealed (O) | 330 - 400 | ≥ 100 | ≥ 40 | 75 - 105 |
| Half Hard (H02) | 380 - 450 | ≥ 200 | ≥ 20 | 105 - 135 |
| Hard (H04) | ≥ 450 | ≥ 350 | ≥ 10 | ≥ 130 |
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Physical Properties
| Property | Typical Value |
|---|---|
| Density | 8.43 g/cm³ (at 20°C) |
| Melting Range | 900 - 905 °C |
| Electrical Conductivity | 27 - 28 % IACS |
| Thermal Conductivity | 118 - 122 W/(m·K) (at 20°C) |
| Coefficient of Thermal Expansion | 20.2 × 10⁻⁶ /K (20-300°C) |
| Modulus of Elasticity | 102 - 110 GPa |
| Specific Heat Capacity | 0.38 kJ/(kg·K) |
Fabrication Characteristics
Hot Workability: Excellent. Optimal hot working temperature: 650 - 750°C.
Cold Workability: Fair to Good. Requires more force than α-brasses; intermediate annealing recommended for severe deformation.
Machinability: Good (Rating: 30%, where free-cutting brass C36000 = 100%).
Weldability: Good for brazing and soldering. Gas and resistance welding possible. Not recommended for arc welding.
Heat Treatment: Can be stress-relief annealed at 250 - 400°C. Not precipitation hardenable.
Corrosion & Environmental Resistance
Atmospheric: Good resistance to urban and marine atmospheres.
Water: Good resistance to fresh water; moderate resistance to seawater (risk of dezincification).
Chemicals: Resistant to many organic solvents. Poor resistance to ammonia, amines, strong acids, and sulfides.
Key Failure Modes: Susceptible to dezincification in certain waters and stress corrosion cracking (SCC) in ammonia-containing environments.
Typical Applications
Architectural: Door handles, locks, hinges, decorative trims, roofing
Mechanical: Gears, valves, pump components, fasteners, heat exchanger plates
Electrical: Connectors, terminals, switch parts, conductive springs
Consumer Goods: Plumbing fixtures, musical instruments, ammunition components, zippers
Our factory
Our modern production base is equipped with advanced full-process production lines dedicated to the manufacturing of copper and copper alloy products. The factory features precision smelting, continuous casting, high-pressure extrusion, high-speed rolling, and precision cutting equipment, ensuring strict control over every step from copper ingot to finished product. We possess strong R&D and customization capabilities, enabling us to produce various specifications and tempers of copper tubes, plates, rods, wires, and ultra-thin foils in accordance with international standards (such as ASTM, EN, JIS) and specific customer requirements. Our products are widely used in various industries, including refrigeration, electronics, power, transportation, and construction.
Copper product packaging
We fully understand that secure packaging is essential for the flawless delivery of products. Tailored to the characteristics of different products, we employ customized professional packaging solutions: copper tubes and rods are typically secured with anti-rust inner liners and sturdy wooden crates or iron-frame boxes to prevent impact and deformation during transit; copper plates, strips, and foils are first covered with protective film, placed in a dry environment, wrapped with waterproof paper and moisture-proof materials, and finally packed into reinforced plywood crates or steel coil boxes to effectively resist moisture and mechanical damage; wires are neatly wound onto wooden or steel reels and firmly strapped. All packaging is clearly labeled and compliant with export standards, ensuring that your goods maintain their excellent factory condition even after long-distance sea transportation and multiple handlings.
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