JIS C7701 / C7521 Electrum Copper Nickel Zinc Alloy German Silver Pipe / Tube For Pressing Parts
JIS C7701 / C7521 Electrum Copper Nickel Zinc Alloy German Silver Pipe / tube for Pressing Parts
Copper-Nickel-Zinc alloy, also called nickel silver, German silver, new silver, nickel brass, albata, or electrum, is a copper alloy with nickel and often zinc. Nickel silver is named for its silvery appearance, but it contains no elemental silver unless plated.
Chemical Content(%)
| Cu | Fe | Mn | Ni | Pb | Zn |
| 61.0~67.0 | < 0.25 | < 0.5 | 16.5~19.5 | < 0.1 | Remainder |
Mechanical Properties
| Condition | 1/2 Hard | Hard | Annealed |
| Hardness | 120 ~ 180 HV | Min. 150 HV | - |
| Tensile Strength | 440 ~ 570 MPa | Min. 540 MPa | Min. 373 Mpa |
| Elongation | Min. 5% | Min. 5% | Min. 20% |
Articles,Chemical composition
| Articles | Chemical composition | |||||
| GB | UNS | EN | JIS | Cu% | Ni% | Zn% |
| BZn18-18 | C75200 | CuNi18Zn20 | C7521 | 62-66 | 16.5-19.5 | Rem |
Physical properties,fabrication properties
| Physical properties | fabrication properties | |||||||||
| density g/cm3 | electrical conductivity %IACS | thermal conductivity W/(m.K) | modulus of elasticity GPa | specific heat J/(g.K) | cold-workability | machinability | electric plating property | hot dip tin plating property | weldability | corrosion |
| 8.73 | 6 | 32 | 125 | 0.34 | excellent | suitable | excellent | excellent | good | excellent |
Mechanical properties
| Mechanical properties | |||||||
| State | Hardness HV | Tension test | bending test | ||||
| Thickness mm | Tensile strength MPa | elongation % | thickness | angles | ID | ||
| 0 | - | 0.1-5.0 | ≥375 | ≥20 | ≤1.6 | 180° | sticking closely |
| 1/2H | 120-180 | 0.1-5.0 | 440-570 | ≥5 | ≤1.6 | 180° | 100% of thickness |
| ≤0.5 | 200% of thickness | ||||||
| H | 150-210 | 0.1-0.15 | 540-640 | - | ≤1.6 | 180° | 200% of thickness |
| >0.15-5.0 | ≥3 | ≤0.5 | 400% of thickness | ||||
| EH | ≥185 | 0.1-5.0 | ≥610 | - | - | - | - |
Typical application
Shields,Liquid crystal oscillators,pressing parts
2. Specification
Pipe/tube : OD 1.0-80mm.
3. Products and services
1). Pass: ISO9001 certification, and SO14001cetification;
2). Fine after-sale services;
3). Small order accepted;
4). Fast delivery;
Get in Touch
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