SCr445 alloy structural steel

   Grade: SCr445 SCr445 alloy structural steel
      Standard: JIS G4053-2003

     Corresponding to the domestic brands: 45Cr

Corresponding U.S. trademark:

● Chemical Composition:

     Carbon C: 0.43 ~ 0.48

Si Si: 0.15 ~ 0.35

Manganese Mn: 0.60 ~ 0.90

Sulfur S: to allow the residual content of ≤ 0.035

Phosphorus P: allow the residual content ≤ 0.035

Chromium Cr: 0.90 ~ 1.20

  Ni: to allow the residual content of ≤ 0.25

Copper Cu: to allow the residual content ≤ 0.030

● Mechanical Properties:

     Tensile strength σb (MPa): ≥ 1030 (105)

   Yield strength σs (MPa): ≥ 835 (85)

Elongation δ5 (%): ≥ 9

Reduction of area ψ (%): ≥ 40

Impact energy Akv (J): ≥ 39

Impact toughness αkv (J/cm2): ≥ 49 (5)

Hardness: ≤ 217HB

     Sample size: Sample size is 25mm rough

● Heat treatment and microstructure specifications: standard heat treatment: quenching 840 ℃, oil cooling; tempering 520 ℃, water-cooled, oil-cooling.

● Delivery status: to heat treatment (normalizing, annealing, or tempering) or heat treatment delivery, delivery status should be indicated in the contract.