Composition & Microstructure
This is the root cause of all differences.
H65 (CuZn35): Contains approximately 65% Copper (Cu) and 35% Zinc (Zn). This composition places it within the alpha (α) phase region of the brass alloy system.
Alpha Brass: Has a face-centered cubic (FCC) crystal structure. This structure is inherently more ductile, malleable, and excellent for cold working.
H62 (CuZn38): Contains approximately 62% Copper (Cu) and 38% Zinc (Zn). This composition is near the boundary of the alpha-beta (α+β) phase region.
Alpha-Beta Brass: Contains a mixture of the soft α-phase and the stronger, harder beta (β) phase. The β-phase (body-centered cubic structure) provides increased strength and improved hot workability.
Mechanical & Physical Properties Comparison
| Property | H65 Brass | H62 Brass | Practical Implication |
|---|---|---|---|
| Strength & Hardness | Lower tensile strength, softer. | Higher tensile strength and hardness. | H62 is better for load-bearing or wear-resistant parts. |
| Ductility & Formability | Excellent ductility. Superior for complex cold-forming (deep drawing, bending). | Good ductility, but less than H65. Better suited for hot working (forging, pressing). | Choose H65 for intricate stamped parts. Choose H62 for hot-forged components. |
| Machinability | Good. Softer material can lead to gumminess. | Very Good. The presence of the β-phase creates small chips, improving machinability. | H62 is often preferred for parts requiring extensive machining (e.g., turned fittings). |
| Corrosion Resistance | Slightly better due to higher copper content. | Very good, but marginally less than H65. | Both are excellent for most environments; H65 has a slight edge in harsh conditions. |
Typical Applications
H65 is typically used for:
Complex cold-formed components: Electrical sockets, connectors, springs, intricate decorative trim.
Deep-drawn parts: Shell casings, musical instrument parts (e.g., bells).
Applications requiring good fatigue resistance and conductivity.
H62 is typically used for:
General-purpose structural components: Nuts, bolts, screws, rivets, architectural hardware.
Heat exchangers and radiator cores.
Plumbing fittings, valves, and pump parts.
Components that may undergo hot forging or require a better strength-to-cost ratio.
How to Choose?
What is the primary manufacturing process?
Cold Stamping/Deep Drawing → Choose H65.
Hot Forging/Pressing or Machining → Choose H62.
What is the part's primary function?
Electrical conductivity, intricate form, spring action → Choose H65.
Structural strength, wear resistance, general hardware → Choose H62.
What are the cost considerations?
H65 has higher copper content, making it generally more expensive.
H62 offers a strong, cost-effective solution for a vast range of non-specialized applications.
| Feature | H65 Brass | H62 Brass |
|---|---|---|
| Common Name | 65/35 Brass, High Ductility Brass | 62/38 Brass, Commercial Brass |
| Key Property | Excellent Cold Workability & Ductility | High Strength & Good Hot Workability |
| Best For | Cold forming processes. | Hot working and general structural use. |
| Analogy | The "pliable wire" – easily shaped when cold. | The "strong bolt" – robust and versatile. |
Our product range
| Category | Product Name | Standard Specifications | Typical Forms | Common Applications |
|---|---|---|---|---|
| Copper Tubes | Copper & Copper Alloy Tubes | ASTM B68, B75, B88, B280, B306, EN 12449, 12451, JIS H3300 | Straight lengths, coils, U-bends | HVACR, plumbing, heat exchangers, refrigeration, industrial pipelines |
| Copper Rods | Copper & Copper Alloy Rods | ASTM B187, B301, B441, EN 12163, 12164, JIS H3250 | Round, hexagonal, square, rectangular | Electrical components, fasteners, machined parts, connectors |
| Copper Plates/Sheets | Copper & Copper Alloy Plates/Sheets | ASTM B152, B248M, EN 1652, JIS H3100, H3110 | Plates, sheets, coils | Architectural cladding, roofing, chemical tanks, electrical shielding, fabrication |
| Copper Wires | Copper & Copper Alloy Wires | ASTM B1, B3, B258, EN 13601, 13602, IEC 60228 | Bare, tinned, stranded, single-end | Electrical wiring, cables, windings, conductors, wire mesh |
| Copper Strips/Bands | Copper & Copper Alloy Strips | ASTM B103, B122, B534, EN 1654, JIS H3110, H3260 | Coils, slit strips, narrow width | Busbars, connectors, terminals, transformers, electronic components |
| Other Copper Products | Custom Profiles & Special Shapes | Custom specifications, drawings accepted | Extruded, drawn, rolled | Custom engineering, automotive, aerospace, specialty industrial uses |
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Copper Packaging
Our copper products all employ professional graded packaging to ensure transportation safety and product integrity: Copper tubes and rods are tightly wrapped with moisture-proof stretch film and secured on reinforced wooden pallets, with extra corner protectors for extra-long tubes; Copper plates, strips, and wire coils are lined with waterproof paper or plastic film, fixed externally with sturdy wooden crates or steel-strapped solid wooden pallets, and include VCI (Volatile Corrosion Inhibitor) paper inside to prevent corrosion. All packages are clearly marked with product information, lifting symbols, and moisture/impact warnings, and can be customized according to client requirements to ensure safe delivery to destinations worldwide.
