Mechanical properties:
Tensile strength σb (MPa): (hot) 510 - 655; (cold drawn) steel thickness or diameter of 8 to 20 hours: 625 ~ 845;> 20 to 30 hours: 590 ~ 785;> 30 hours: 570 ~ 765
Elongation δ5 (%):( hot) ≥ 14; (cold) ≥ 6.0
Reduction of ψ (%):( hot) ≥ 22
Hardness: (hot) ≤ 187HB; (cold drawing) 176 ~ 229HB
Delivery status:
To hot-rolled or cold-drawn state of delivery, delivery status should be indicated in the contract.
Chemical Composition (%):
C :0.32-0 .40
Mn :0.70-1 .00
P: ≤ 0.06
S :0.08-0 .15
Si :0.15-0 .35
