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.