Cold pier line mainly used a variety of fasteners, such as: mechanical parts and components, electronic components, and other applications. According to different materials, receive corresponding anti-corrosion properties and mechanical properties. When access to a cold forging better shape, choose high quality, appropriate materials it is particularly important to the wire. Telegraph Type Steel Chemical Composition AISI SUS C Si Mn P S Ni Cr Other 304 304 ≤0.08 ≤1.00 ≤2.00 ≤0.045 ≤0.030 8.00- 10.50 18.00- 20.00 - 302HQ XM-7 ≤0.08 ≤1.00 ≤2.00 ≤0.045 ≤0.030 8.00- 10.50 17.00- 19.00 Cu:3.00- 4.00 - (304J3) ≤0.08 ≤1.00 ≤2.00 ≤0.045 ≤0.030 8.00- 10.50 18.00- 19.00 Cu:1.00- 3.00 (305) 305J1 ≤0.08 ≤1.00 ≤2.00 ≤0.045 ≤0.030 11.00- 13.50 16.50- 19.00 - 316 316 ≤0.08 ≤1.00 ≤2.00 ≤0.045 ≤0.030 10.00- 14.00 16.00- 18.00 Mo:2.00- 3.00 - - ≤0.03 ≤1.00 ≤2.00 ≤0.040 ≤0.030 10.50- 13.50 16.00- 18.00 Cu:2.80- 3.80 Mo:2.00- 3.00 430 430 ≤0.12 ≤0.75 ≤1.00 ≤0.040 ≤0.030 - 16.00- 18.00