Steel Grade: 60# 65#, 65Mn, 70#, 72A, 72B, SAE1060,SAE1065 Diameter Range: 1.30--6.00mm 1. Product Name: High carbon steel wires, spring steel wires, mattress spring wire, high carbon spring steel wires2. Material: Steel GradeGB StandardCarbon%Silicon%Manganese%Phosphorus%Sulphur %Chromium%Nickel%Cuprum%60#0.60-0.610.18-0.220.52-0.590.0120.0070.06-0.070.050.1865#0.650.210.560.0130.0080.050.040. ...