Overview
White copper strip is a copper-nickel-zinc alloy known for its silvery appearance and corrosion resistance. Unlike pure copper, its nickel content (typically 10-30%) provides improved strength and tarnish resistance while maintaining good electrical conductivity. The material is commonly produced in thicknesses ranging from 0.05mm to 3mm, with widths up to 600mm. Historically developed as a nickel silver alternative, modern white copper alloys like C7521 (18% Ni) and C7701 (35% Ni) are standardized under ASTM B122. The material is valued in B2B markets for its combination of workability and durability, serving as a cost-effective alternative to pure nickel strips in many applications.
Physical and Chemical Properties
White copper exhibits a unique combination of properties: tensile strength ranges from 300-700 MPa depending on temper, with electrical conductivity at 5-15% IACS (significantly lower than pure copper but sufficient for many applications). Its thermal expansion coefficient is approximately 17.5×10⁻⁶/°C, similar to brass. Chemically, the nickel content provides exceptional resistance to atmospheric corrosion, seawater, and alkaline solutions. However, it remains susceptible to strong acids and ammonia compounds. The alloy's silver-like appearance stems from nickel's ability to suppress copper's natural reddish hue, with higher nickel percentages yielding whiter surfaces.
Main Applications
In electronics manufacturing, white copper strip is favored for RF shielding, battery contacts, and connector springs due to its spring properties and stable contact resistance. Thinner gauges (0.1-0.5mm) are precision-rolled for flexible printed circuits. The construction industry utilizes it for marine hardware (hinges, fasteners) and architectural trim where saltwater resistance is required. Decorative applications include musical instrument components (e.g., flute keys), jewelry findings, and premium appliance trim. Emerging uses include medical device components and renewable energy system connectors.
Safety and Storage
As a solid metal product, white copper strip poses minimal health risks during normal handling. However, nickel-containing dust generated during machining may cause respiratory irritation or skin sensitization in allergy-prone individuals. OSHA PEL for nickel is 1mg/m³ as an 8-hour TWA. Storage requires protection from humid environments to prevent surface oxidation. Coiled strips should be stored on edge to prevent deformation. For long-term storage, vapor corrosion inhibitors (VCI) paper wrapping is recommended. Avoid contact with dissimilar metals to prevent galvanic corrosion.
B2B Procurement Guide
Professional buyers should prioritize mill certifications (e.g., ASTM B122 compliance) and request material test reports for critical applications. Key specifications to confirm include nickel content (±1% tolerance), temper (O for soft, H for spring hardness), and surface finish (No.1 bright, No.3 matte). For custom orders, minimum order quantities typically start at 500kg for standard sizes. Lead times vary from 2-8 weeks depending on alloy availability. Quality verification should include eddy current testing for defects and spectrographic analysis for composition. Consider ISO 9001-certified suppliers with experience in your target industry.
Related Manufacturers
- 主营：[]
- 主营：C71500白铜板、镍合金法兰、特种钢、镍合金管件
- 主营：sa675gr70、f11圆钢、f92圆钢、30白铜板、f51圆钢、f91圆钢、34crnimo6、60si2crva、30crmntih、20crnimoa、b16圆钢、20crmnmoa、25#圆钢、30crnimo8、17crnimo6、h13圆钢、f53圆钢、f52圆钢、30crmnsia、40crmnmoa、f55圆钢、a36圆钢、f22圆钢、20crni2mo、f60圆钢、35crmnsia
- 主营：加热炉、炉门框、炉底板、钢带、炉底护板、耐热铸板、炉口护板、窑口护板、耐热钢铸板
- 主营：哈氏合金板、C276钢板、1.4529钢板、蒙乃尔400钢带、GH4169钢带、高温合金圆钢、蒙乃尔400钢板、C276圆钢、GH4169圆钢、N06625钢板、N06600钢板、RA330钢板、N08926钢管、不锈钢板、不锈钢管、镍基合金板、圆钢、锻件、N06601钢板、N08825钢管、N08825钢板、N08629钢管、N08367钢板、1.4529不锈钢板、N07718圆钢
- 主营：抓斗、炉底板、落煤管、C70600镍白铜钢带、离心铸管、垫铁炉枕、吊具、料框、料盘、坩埚、滑块、高铬铸板、炉辊、溜渣槽、钢板、无缝管、圆棒
- 主营：镍及镍合金、高温合金、耐蚀合金、哈氏合金、蒙内尔合金、钴基合金、特殊铜合金、铜及铜合金
- 主营：铜镍合金、C70600铜镍管、铜镍管件、白铜钢带、B10铜镍法兰、B30铜镍弯头、C71500铜镍棒、铜镍管、铜镍板、铜镍法兰、镍基合金、高温合金、因科洛伊、英科耐尔、哈氏合金、蒙乃尔、镍基合金法兰管件、紫铜、黄铜、冷凝管、换热管、翅片管
- 主营：工装料盘、耐磨锤头、钢球、耐热钢铸板、铸管、加热炉滑块、炉篦条、铝厂抓斗、铸件、耐磨钢、消失模铸造、合金板、锻件、不锈钢、铝锭、料筐、热处理工装
- 主营：炉门框、支撑板、炉底垫板、白铜钢带、耐磨衬板、耐热滑轨、高温炉板、退火托盘、耐热钢滑块、箱式炉炉底板
- 主营：镍基合金板、铜镍合金管、高温合金管件、B10白铜板、蒙乃尔400、因科洛伊800、英科耐尔600、哈氏合金C276、HAl77-2黄铜管、T2紫铜管、B30铜镍无缝管、TP2螺纹管、B10铜镍法兰、C70600铜镍板、C71500铜镍管、冷凝换热管、冷凝器用铜镍管、船舶用铜镍合金管件、化工用合金管、换热器用铜管、铜镍三通/异径管件、翅片管
- 主营：合金钢板、无缝钢管、焊管、B10白铜板、C70600钢板、C71500钢板、B30无缝管、Monel400钢板、N04400焊管、0Cr13Ni4Mo钢板、0Cr13Ni5Mo钢板、253MA钢板、S32760钢板、N08810钢板、C276法兰、1Cr13厚壁管、346LMod无缝管、C276三通、N10276弯头、Incoloy825钢板、N08825圆钢、F55法兰三通、F45圆钢
- 主营：输煤管、挡渣板、精轧管、白铜管、合金钢、电渣锭、翻板阀、铜圆棒、无缝管、渣溜槽、排渣管、异径管、炉底管、反应器、螺栓螺、铸钢件、耐蚀板、特厚板、镍铜棒、还原罐、造配件、耐热钢、热轧管、铜镍板、篦冷机
- 主营：白铜棒、白铜板、镍基合金、铜镍合金
- 主营：B10白铜带、不锈钢板、不锈钢管、不锈钢圆钢
- 主营：大圆钢、实心棒材、合金圆钢、b30钢带、螺钉钢棒、合金圆棒、冷拔圆钢、弹簧圆钢、调质圆棒、冷拉圆钢、锻造圆钢、合金结构钢棒