30CrMnSiA steel round bar Chemical composition

30CrMnSiA steel round bar is medium carbon steel, 30CrMnSiA steel round bar has high strength and poor welding property. 30CrMnSiA steel round bar has a high strength and toughness, and the hardenability. The material is made of sand wheel shaft, gear, chain wheel.

30CrMnSiA steel round bar has good processability, small processing deformation and excellent fatigue resistance. 30CrMnSiA is used for axial and piston parts. It is used in automobile, aircraft, special wear-resisting parts, etc.

30CrMnSiA steel round bar Chemical composition

Silicon Si: 0.90 to 1.20

Mn: 0.80 to 1.10

Sulfur S: allow residual content ≤ 0.025

Phosphorus P: Allow residual content ≤ 0.025

Cr Cr: 0.80 to 1.10

Ni: Allowable residual content ≤0.030

Copper Cu: Allowable residual content ≤ 0.025

30CrMnSiA steel round bar Mechanical properties

Tensile strength σb (MPa): ≥1080 (110)

Yield strength σs (MPa): ≥835 (85)

Elongation rate δ5 (%): ≥10

Section shrinkage ψ (%): ≥45

Impact energy Akv (J): ≥39

Impact toughness value αkv (J / cm ²): ≥ 49 (5)

Hardness: ≤ 229HB

Sample size: sample blank size of 25mm

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