Grade
China GB | Bzn15-20 |
American ASTM | C75400 |
European EN | CW400 |
Japanese JIS | C7451 |
Chemical Composition
(Weight%)
Copper Cu | 62-65 |
Nickel Ni+Co | 13.5-16.5 |
Iron Fe | ≤0.2 |
Lead Pb | ≤0.2 |
Manganese Mn | ≤0.3 |
Phosphorus P | ≤0.005 |
Zinc Zn | Remains |
Product Properties
Bzn15-20 has strong corrosion resistance, high elasticity, medium to high strength, good processing and formability, and good weldability.
Application Fields
● Precision Machining ● Various Springs ● Clothing Bags ● Plugs
Fatigue Strength
The maximum stress that can withstand a certain number of cycles without fracture is the fatigue strength. The standard fatigue strength of copper alloys is reported for 100,000,000 cycles.
Physical Properties
Density | 8.7 | g/cm³ |
Conductivity @20℃ | 11 | %IACS |
Electrical Conductivity @20℃ | 260 | C/nΩ·M |
Thermal Conductivity @20℃ | 25.2-35.7 | W/(m·K) |
Specific Heat Capacity | 399 | J/(kg-K) -1 |
Elastic Modulus | 105 | MPa |
Yield Strength | 0.34 | GPa |
Coefficient of Thermal Expansion | 20.4 | um.(m.K) -1 |
Mechanical Properties
Specifications | State | Tensile Strength | Yield Strength | Hardness | Elongation | |
mm | MPa | ksi | MPa | HV | A% | |
Φ0.1-0.2 | 060 | 450 | 65 | -- | 140 | ≥15 |
>Φ0.2-0.5 | 060 | 440 | 64 | -- | 137 | ≥20 |
>Φ0.5-2.0 | 060 | 430 | 62 | -- | 135 | ≥25 |
>Φ2.0-8.0 | 060 | 400 | 58 | -- | 125 | ≥30 |
Φ0.1-0.2 | H01 | 470-660 | 68-96 | -- | 147-205 | ≥10 |
>Φ0.2-0.5 | H01 | 435-570 | 63-83 | -- | 137-173 | ≥12 |
>Φ0.5-2.0 | H01 | 420-550 | 60-80 | -- | 132-172 | ≥14 |
>Φ2.0-8.0 | H01 | 410-520 | 59-75 | -- | 127-163 | ≥16 |
Φ0.1-0.2 | H02 | 510-780 | 74-113 | -- | 160-242 | -- |
>Φ0.2-0.5 | H02 | 490-735 | 71-107 | -- | 155-228 | -- |
>Φ0.5-2.0 | H02 | 440-685 | 64-99 | -- | 137-213 | -- |
>Φ2.0-8.0 | H02 | 440-635 | 64-92 | -- | 137-197 | -- |
Φ0.1-0.2 | H03 | 620-860 | 90-125 | -- | 192-267 | -- |
>Φ0.2-0.5 | H03 | 610-810 | 88-117 | -- | 190-253 | -- |
>Φ0.5-2.0 | H03 | 595-760 | 86-110 | -- | 185-237 | -- |
>Φ2.0-8.0 | H03 | 580-700 | 84-102 | -- | 182-217 | -- |
*For reference only
Corrosion Resistance
Fe has low solubility in Cu+Ni alloys. It improves the corrosion resistance and mechanical properties of Cu-Ni alloys, and significantly improves the resistance of Cu-Ni alloys to seawater impact corrosion. When the Fe content is greater than 2%, the alloy has a tendency for stress corrosion cracking, and when Fe is greater than 4%, the corrosion intensifies.
Tolerance Accuracy
Specifications | Tolerance | Straight bar length | |||
mm | Circle line mm |
Straight bar mm |
Specifications | Length m |
Length tolerance mm |
0.3-1.0 | 0.01 | -- | -- | -- | -- |
>1.0-2.0 | 0.02 | 0.02 | 1.5-<1.8 | 0.5-1.0 | ±10mm |
>2.0-4.0 | 0.02 | 0.03 | 1.8-2.5 | 0.5-2.0 | ±10mm |
>9.0-12.0 | 0.04 | 0.05 | >9.0 | 2.0-3.0 | ±10mm |
Supply method
Specifications | Standard roll weight | Roll inner diameter |
mm | kg | mm |
0.8-1.1 | 15-25 | 200-250 |
0.8-1.6 | 15-25 | 200-250 |
0.8-1.6 | 15-25 | 200-250 |
0.8-1.7 | 15-25 | 200-250 |
1.5-2.0 | 30-40 | 200-250 |
2.0-2.5 | 25-40 | 320-350 |
2.8-6.5 | 30-45 | 370-400 |
4.0-6.5 | 100-250 | 400-650 |
6.5-10.0 | 50-100 | 400-650 |
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