Wire Size: 5.00mm-12.00mm Standard: EN 10270-1,SH, DIN17223, Grade C Material: SAE1080, 82A, 82B 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. ...