| 摘要 |
PROBLEM TO BE SOLVED: To manufacture a wire provided with basic features such as strength, elongation and corrosion resistance and cope with the recent tendency of smaller electronic circuits. SOLUTION: A composite steel wire is formed of a high-carbon steel core material 2 with an austenite stainless steel outer skin material 3 processed integrally on its outer periphery, and the outer skin material ratio is set as 20-60%. The wire diameter of the composite steel wire is 15-50μm, and tensile strength is 150-50 kgf/mm<2> , and breaking extension is 4.5-10.0%.
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