What is H62 brass?
H62 brass rod is a common brass material based on a copper-zinc alloy, with an average copper content of 62% and zinc as the balance, containing trace impurities. This material possesses both good mechanical and machinability, excellent plasticity in the hot state, and fair plasticity in the cold state. It has good machinability, weldability, and corrosion resistance, but there is a risk of corrosion cracking. Due to its low price and wide applicability, it is commonly used to manufacture load-bearing parts such as pins, rivets, washers, nuts, conduits, pressure gauge springs, screens, and radiators.
Chemical Composition (Weight %, GB/T 5231)
| Element | Min (%) | Max (%) | Typical (%) |
|---|---|---|---|
| Cu (Copper) | 60.5 | 63.5 | ~62.0 |
| Zn (Zinc) | Balance | Balance | ~38.0 |
| Impurities (Pb, Fe, etc.) | – | ≤ 0.5 (total) | – |
Typical Mechanical Properties
| Condition | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HV) |
|---|---|---|---|---|
| Annealed (O) | 330 – 400 | ≥ 100 | ≥ 40 | 70 – 100 |
| Half-Hard (H02) | 380 – 450 | ≥ 200 | ≥ 20 | 100 – 130 |
| Full-Hard (H04) | ≥ 450 | ≥ 350 | ≥ 10 | ≥ 130 |
Physical Properties
| Property | Value / Description |
|---|---|
| Density | 8.43 g/cm³ |
| Melting Range | 900 – 905 °C |
| Electrical Conductivity | ~28 % IACS (at 20°C) |
| Thermal Conductivity | ~120 W/(m·K) |
| Coefficient of Thermal Expansion | 20.2 × 10⁻⁶ /K (20-300°C) |
| Modulus of Elasticity | ~105 GPa |
| Magnetic Properties | Non-magnetic |
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Fabrication & Processing Characteristics
Hot Workability: Excellent. Ideal for hot forging, extrusion, and stamping (recommended working temp: 650-750°C).
Cold Workability: Fair to Good. Requires more force than α-brasses; intermediate annealing may be needed for severe deformation.
Machinability: Good (Machinability rating: ~30%, where free-cutting brass C36000 = 100%).
Weldability & Joining: Good for brazing and soldering. Gas welding and resistance welding are possible; arc welding is challenging.
Heat Treatment: Responds to stress-relief annealing (250-400°C). Not precipitation-hardenable.
Corrosion Resistance
General: Good resistance to atmospheric, fresh water, and seawater corrosion.
Key Risk: Susceptible to dezincification in stagnant or slow-moving waters, especially with high chloride content and low pH. Also sensitive to ammonia-induced stress corrosion cracking (SCC).
Common Protection: Use in suitable environments; inhibitors or material selection (e.g., arsenic-containing brass for dezincification resistance) for critical applications.
Typical Applications
Architectural & Decorative: Door handles, hinges, locks, architectural facades, decorative hardware.
Industrial Components: Valves, pump parts, gears, fasteners, heat exchanger plates, condenser tubes.
Electrical: Electrical connectors, terminals, switch components.
Consumer Goods: Plumbing fixtures, musical instrument parts, nameplates, ammunition components.
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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