What do you know about 20CrMnSiA alloy structural steel

20CrMnSiA steel is alloy structural steel with high strength and toughness. It also has multiple impact resistance, good low temperature impact toughness and wear resistance, high plasticity and good weldability.

Chemical composition of 20CrMnSiA alloy structural steel:
C: 0.17-0.23, Si: 0.90-1.20, Mn: 0.80 - 1.10, S: allowable residual content ≤ 0.035, Phosphorus P: allowable residual content ≤ 0.035, Chromium Cr: 0.80 - 1.10, Ni: allowable residual content ≤ 0.030, Cu: allowable residual content ≤ 0.030.

The mechanical properties of 20CrMnSiA alloy steel:
Tensile strength σb (MPA): ≥ 785 (80), elongation δ5 (%): ≥ 12, Yield strength σs (MPA): ≥ 635 (65), reduction of area ψ (%): ≥ 45, Impact energy Akv (J): ≥ 55, impact toughness value αkV (J / cm2): ≥ 69 (7), Hardness: ≤ 207HB.

20CrMnSiA alloy structural steel is suitable for manufacturing cold stamping or cold drawing parts and welding parts with higher requirements. It can also manufacture parts with higher toughness requirements, such as high-strength mining ring chain, high-strength bolts, etc. 20CrMnSiA structural steel is generally delivered in annealed status.