Material Name: cutting structural steel
Standard: GB / T 8731-1988
● Features and Scope:
Low parathion composite cutting steel, which is better than cutting steel but lower than the 20th, but cutting structural steel
The mechanical properties than low-carbon steel. Carburizing treatment can be carried out after cutting molding, used to make the surface hardness, high toughness instrumentation center shaft parts and wear parts.
● Chemical Composition:
Carbon C: 0.17 ~ 0.25
Si Si: 0.15 ~ 0.35
Mn Mn: 0.70 ~ 1.00
Sulfur S: 0.08 ~ 0.15
Phosphorus P: ≤0.06
● Mechanical Properties:
Tensile strength σb (MPa) :( hot) 450 to 600; (cold drawn) steel thickness or diameter of 8 to 20 o'clock: 570 to 785;> 20 to 30: 530 - 745;> 30: 510 - 705
Elongation δ5 (%) :( hot rolled) ≥20; (rolled) ≥7.0
Reduction of area ψ (%) :( hot rolled) ≥30
Hardness :( hot) ≤175HB; (cold drawing) 167 ~ 217HB
● Delivery status: hot-rolled or cold-drawn delivery, the delivery status should be specified in the contract