Designation
CuZn5 (Common Brass)
International Standards: CW500L (EN), 2.0220 (DIN 1708), H96 (GB/T 5231).
Key Features
1. High Purity & Workability: Cu ≥95%, excellent cold/hot forming, welding, and forging performance.
2. Conductivity & Thermal Conductivity: Electrical conductivity ≥57.0 Ω*mm²/m (annealed), thermal conductivity 385 W/(m·K).
3. Corrosion Resistance: Stable in atmospheric, freshwater, and mild chemical environments.
4. Moderate Strength: Higher than pure copper but lower than other brasses, with good plasticity.
Product Forms & Dimensions
Form | Dimensions |
Rod | Diameter: Φ4–600mm; Length: 1000–5000mm |
Sheet | Thickness: 0.2–60mm; Width: 500–2000mm |
Tube | OD: 5–200mm; Wall Thickness: 0.5–10mm |
Wire | Diameter: 0.5–25mm; Custom lengths |
Foil | Thickness: 0.005–0.5mm; Width: 10–500mm |
Custom profiles available (e.g., flanges, lead frames). |
Chemical Composition (%)
Element | Cu | Zn | Pb | Fe | Total Impurities |
Content | 94.0–96.0 | Balance | ≤0.05 | ≤0.05 | ≤0.1 |
Note: Cu content varies by standard (94–96% in DIN 17660, ≥95% in GB). |
Physical Properties
Property | Value |
Density | 8.9 g/cm³ |
Melting Point | 1083°C |
Thermal Conductivity | 385 W/(m·K) |
Electrical Conductivity | 57.0–58.0 Ω*mm²/m |
Resistivity | 1.724×10⁻⁸ Ω·m |
Thermal Expansion | 17.7×10⁻⁶/K（20–100°C）. |
Mechanical Properties
Condition | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HV) |
Annealed | 230–280 | 130 | ≥45 | 45–75 |
Half-Hard | 270–350 | 200 | ≥19 | 75–110 |
Hard | 340 | 280 | ≥8 | 110 |
Data based on EN 1652 and DIN 17672-1. |
Core Advantages
1. Hydrogen Embrittlement Resistance: O ≤0.03% prevents cracks in H₂ environments.
2. Precision Machining: Fine-grained structure minimizes deformation.
3. Versatility: Balances conductivity, thermal performance, and corrosion resistance.
Applications
Electronics: Connectors, wires, cable sheaths (high conductivity).
Mechanical Parts: Gears, bearings, springs (moderate strength).
Construction: Water pipes, radiators (corrosion resistance).
Art & Jewelry: Decorative items (excellent surface finish).
Processing Guidelines
1. Cold Working: Anneal at 520–650°C (under protective atmosphere).
2. Hot Working: Temperature range 750–830°C, final rolling ≥600°C.
3. Welding: Use silver-based filler or TIG welding; avoid reducing atmospheres.
Key Application Scenarios
Industry | Typical Components | Requirements |
Power Transmission | HV cable conductors | High current capacity, low resistance |
Vacuum Devices | Magnetron anodes | Low gas emission, high-temperature brazing |
Mold Manufacturing | Stamping dies | High surface precision, fatigue resistance |
FAQ
Q1: Difference between CuZn5 and pure copper?
A1: CuZn5 has higher strength (≥230 MPa) and better corrosion resistance due to zinc, but lower conductivity.
Q2: How to prevent hydrogen embrittlement?
A2: Control oxygen content ≤0.03% and avoid high-temperature hydrogen environments.
Q3: Why does conductivity vary?
A3: Conductivity decreases with cold working (e.g., 58.0 Ωmm²/m in annealed vs. 57.0 Ωmm²/m in hard state).
Standards
Standard | Scope |
GB/T 5231 | Chinese brass classifications |
DIN 17660 | German chemical & mechanical specs |
EN 1652 | European sheet/rod technical conditions |
ASTM B152 | U.S. specifications for sheet/strip |
Note: Actual parameters may vary depending on manufacturing processes.
English
한국어
français
Deutsch
Español
italiano
العربية
tiếng việt
Türkçe
ไทย
中文
