● Chemical Composition:
Carbon C: 0.10 ~ 0.15
Si Si: 0.10 ~ 0.40
Mn Mn: 0.85 ~ 1.15
Sulfur S: 0.23 ~ 0.33
Phosphorus P: 0.04 ~ 0.09
Lead Pb: 0.15 ~ 0.35
● Mechanical Properties: Tensile strength σb (MPa) :( hot) 390 to 540; (cold drawn) steel thickness or diameter of 8 to 20 o'clock: 530 to 755;> 20 to 30: 510 - 735;> 30 : 490 ~ 685 elongation δ5 (%) :( hot rolled) ≥22; (rolled) ≥7.0 section shrinkage ψ (%) :( hot rolled) ≥36 hardness :( hot) ≤170HB; (cold drawn steel) 152 ~ 217HB
● Heat treatment and microstructure specifications:
● Delivery status: hot-rolled or cold-drawn delivery, the delivery status should be specified in the contract.
