SOFT DILUTE COPPER ALLOY WIRE, SOFT DILUTE COPPER ALLOY SHEET AND SOFT DILUTE COPPER ALLOY TWISTED WIRE

摘要

PROBLEM TO BE SOLVED: To provide a soft dilute copper alloy wire, a soft dilute copper alloy sheet, and a soft dilute copper alloy twisted wire which have high electrical conductivity, and high tensile strength and elongation despite soft material, and further have low hardness.SOLUTION: A soft dilute copper alloy material includes one or more kinds of addition elements selected from the group comprising Ti, Mg, Zr, Nb, Ca, V, Ni, Mn and Cr, with the balance comprising copper. The soft dilute copper alloy wire, the soft dilute copper alloy sheet or the soft dilute copper alloy twisted wire is formed from the soft dilute copper alloy material and characterized in that the average crystal grain size in the region from the surface of the soft dilute copper alloy wire or sheet toward inside to a depth of at least 20% of the wire diameter or the sheet thickness is 20 m and less.