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38CrSi Alloy steel bar

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  • 11-May-2024

38CrSi alloy constructional steel. Unified digital code: A21382
Standard: GB/T 3077-1988

38CrSi steel chemical composition

C

Si

Mn

S

P

Cr

Ni

Cu

0.35~0.43

1.00~1.30

0.30~0.60

≤0.035

≤0.035

1.30~1.60

≤0.030

≤0.030

38CrSi steel mechanical properties
The sample blank dimensions(mm):25

Heat treatment:
The first quenching heating temperature (℃) : 900; Coolant: oil;
The second quenching heating temperature (℃) : tempering heating
Tensile strength σb (MPa):≥960(100)
Yield strength σs (MPa):≥840(85) Elongation δ5 (%):≥12
Reduction of area ψ (%):≥50 Impact energy Akv (J):≥55
Impact toughness values αkv (J/cm2):≥69(7)
Brinell hardness (HBS100/3000) or high temperature tempering, annealing state) : ≦ 255

Delivery status: by heat treatment (normalizing, annealing and high temperature tempering) or heat treatment state delivery, delivery status should be indicated in the contract.

38CrSi steel main features: it is a kind of high intensity, the medium toughness of steel, it is the hardenability of a little well, than 40 cr in oil critical hardening of 25-83.5 mm in diameter; Steel machinability is good, but you have temper brittleness tendency of heat treatment, cold and low deformation plasticity, poor weldability.

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