Grade
| China GB | Bzn10-25 |
| American ASTM | -- |
| European EN | -- |
| Japanese JIS | C7451 |
Chemical Composition
(Weight%)
| Copper Cu | 63.5-66.5 |
| Nickel Ni+Co | 9.0-11.0 |
| Iron Fe | ≤0.2 |
| Lead Pb | ≤0.09 |
| Manganese Mn | ≤0.5 |
| Phosphorus P | ≤0.05 |
| Zinc Zn | Remains |
Product Properties
Bzn10-25 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 ● Eyeglass Accessories
Fatigue Strength
The maximum stress that can withstand a certain number of cycles without fracture is fatigue strength. The standard fatigue strength of copper alloy is reported for 100,000,000 cycles.
Physical Properties
| Density | 8.94 | g/cm³ |
| Conductivity @20℃ | 9.1 | %IACS |
| Electrical Conductivity @20℃ | 190 | C/nΩ·M |
| Thermal Conductivity @20℃ | 40 | W/(m·K) |
| Specific Heat Capacity | 380 | J/(kg-K) -1 |
| Elastic Modulus | 120 | MPa |
| Yield Strength | 140 | GPa |
| Coefficient of Thermal Expansion | 16.4 | 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 | 375 | 54 | -- | 127 | ≥18 |
| >Φ0.2-0.5 | 060 | 355 | 51 | -- | 112 | ≥25 |
| >Φ0.5-2.0 | 060 | 335 | 49 | -- | 105 | ≥30 |
| >Φ2.0-8.0 | 060 | 275 | 40 | -- | 87 | ≥35 |
| Φ0.1-0.2 | H01 | 400 | 58 | -- | 125 | ≥10 |
| >Φ0.2-0.5 | H01 | 380 | 55 | -- | 120 | ≥15 |
| >Φ0.5-2.0 | H01 | 370 | 54 | -- | 115 | ≥20 |
| >Φ2.08.0 | H01 | 330 | 48 | -- | 103 | ≥25 |
| Φ0.1-0.2 | H02 | 410 | 59 | -- | 127 | |
| >Φ0.2-0.5 | H02 | 390 | 57 | -- | 123 | ≥5 |
| >Φ0.5-2.0 | H02 | 375 | 54 | -- | 117 | ≥10 |
| >Φ2.0-8.0 | H02 | 340 | 49 | -- | 107 | ≥12 |
| Φ0.1-0.2 | H03 | 540-735 | 78-107 | -- | 168-228 | -- |
| >Φ0.2-0.5 | H03 | 490-685 | 71-99 | -- | 155-213 | -- |
| >Φ0.5-2.0 | H03 | 440-635 | 64-92 | -- | 137-198 | -- |
| >Φ2.0-8.0 | H03 | 340-520 | 49-75 | -- | 107-163 | -- |
*For reference only
Corrosion Resistance
H70 shows good corrosion resistance in atmospheric environments. O2 forms CuO and ZnO on the surface of brass, slowing down corrosion. In marine environments, corrosive ions such as CI- and So24- in seawater penetrate the surface oxide film, forming soluble complexes and accelerating corrosion.
Tolerance Accuracy
| Specifications | Tolerance | Straight Bar Length | |||
| mm | Coil 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 |
| >Φ4.0-6.0 | 0.03 | 0.04 | >2.5-5.0 | 1.0-2.5 | ±10mm |
| >6.0-9.0 | 0.03 | 0.04 | >5.0-9.0 | 1.0-2.5 | ±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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