... 3521-91, DIN 17223 1. Product Name: High carbon steel wires, spring steel wires, mattress spring ... wire, high carbon spring steel wires2. Material:Steel GradeGB ... , Turkey, India, Bangladesh,5. Our other product: High carbon steel wires, medium carbon steel wires, low carbon ... , 1008, 1010, YD195, Q195, Q235,40#, 42A, 42B, 45#, 60#, 65#, 65Mn, 70#, 72A, 72B, 80#, 82A, ...