Cu-Ni-Zn alloy material with exceptional elasticity and corrosion resistance. Ideal for demanding applications requiring high reliability and frequent disassembly in military, medical, and aerospace sectors. Long-lasting, stable shielding performance.
| Performance Parameter | Specification | Description |
|---|---|---|
| Material Grade | C7521 (China Standard) / C7701 | Cu-Ni-Zn ternary alloy, 5-7% nickel content, ensures corrosion resistance |
| Electrical Conductivity | ~6% IACS | Lower, but sufficient for shielding needs, trade-off for strength |
| Density | 8.8 g/cm³ | Slightly lighter than pure copper, slightly heavier than stainless steel |
| Tensile Strength | 400-600 MPa | Excellent strength, enables fine spring pieces |
| Hardness | HV 150-220 | Adjustable through heat treatment for desired hardness and elasticity |
| Elastic Recovery | >95% | Outstanding spring characteristics, resists deformation after repeated compression |
| Weldability | Good (Grade B) | Weldable with controlled process to prevent embrittlement |
| Corrosion Resistance | Excellent (A+ Grade) | Certified for marine, high-humidity, salt-fog environments |
| Standard Thickness | 0.10-0.20 mm | Thin and powerful, enables high-precision spring piece manufacture |
| Cost Relative Value | 3.0x (relative to tinplate) | Higher material cost, but long-term durability yields lower lifecycle cost |
Nickel silver shielding covers are best suited for the following sectors demanding high reliability and durability:
Nickel silver is inherently corrosion-resistant, with additional enhancement available for special environments:
Serving telecom, consumer electronics, automotive, medical and many other industries
20+ high-precision stamping presses, 20-member professional R&D team, 2-3 day fast delivery, providing full-process service from design to mass production
Stamping Workshop
Equipped with 20+ high-speed precision stamping presses, with a daily stamping capacity of 3 million strokes and accuracy of ±0.01mm.
Tooling Center
20-member professional R&D team, producing 100+ sets of precision tooling per month, from drawings to finished products in as fast as 2-3 days.
Quality Lab
Incoming inspection → In-process control → Final inspection → Shipping inspection, dual certified with ISO 9001 and IATF 16949.
Military, medical, aerospace high-reliability applications. We provide full technical support from material selection, process design, reliability assessment to mass production.
