| 摘要 |
Regarding contents of C, Si, Mn and Cr, a value of parameter P represented by the following (equation 1) is 1000 or more. A metallic structure contains wire-drawn pearlite in an area ratio of 98% or more, a diameter is 0.05 mm to 0.18 mm, a tensile strength is 4000 MPa or more, and a twist number in a twist test in which a grip-to-grip distance is 100 mm, and a tension equal to a tensile strength × a cross-sectional area of wire × 0.5 is applied, is 5 or more. P = 1098 × C + 98 × Si - 20 × Mn + 167 × Cr
(in the (equation 1), [C], [Si], [Mn] and [Cr] indicate contents (mass%) of C, Si, Mn and Cr, respectively.) |
