Precision Alloy Wire

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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Bzn15-20

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