The Y20 chemical composition and mechanical properties
   
    ● Features and Scope:
Low parathion composite cutting steel, the cutting performance is better than the No. 20 steel to below Y12 steel, but the mechanical properties of the Y20 higher than

Y12 steel. Cutting can be performed after forming the carburizing treatment, used to make the surface hard, Center toughness instrumentation parts and

Shaft wearable pieces.
● Chemical Composition:
Carbon C: 0.17 ~ 0.25
Silicon Si: 0.15 ~ 0.35
Manganese 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 hours: 570 to 785;> 20

30 to 30 hours: 530 to 745;>: 510 to 705
Elongation δ5 (%): (hot-rolled) ≥ 20; (cold rolled) ≥ 7.0
Reduction of area ψ (%): (hot-rolled) ≥ 30
Hardness: (hot) ≤ 175HB; (cold-drawn) 167 ~ 217HB
● Delivery status: hot-rolled or cold-drawn state delivery, delivery status should be specified in the contract.