GB/T 3077 38CrSi round bars

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11-May-2024

38CrSi alloy structural steel under GB/T 3077 chinese standard, belongs to a high strength steel.

GB/T 3077 38CrSi round bar

GB/T 3077 38CrSi can be produced into hot rolled round bars and square bars, cold-drawing bars,forged bars. We henan KUNFENG can supply GB/T 3077 38CrSi all of shapes.

can be used for axle,principal axis and some percussion tools which requires high strength and abrasion resistance.

According to the market needs, henan KUNFENG supply the oversea markets for GB/T 3077 38CrSi hot rolled round bars OD 6mm -80 mm and 20MnV forged round bars OD 80 mm - 1200 mm, also GB/T 3077 38CrSi forged square bars OD 100- 1200 mm. The OD tolerance is about 0-3mm and length tolerance is about 0-20 mm.

are usually produced under the followed procedures: EAF arc furnace + LF purify affinage + VDF + ingot steel(bottom gating /argon) + forged + annealing + black polishing (turnery) + GB/T6402-92 ΙΙ UT test + smooth edges with sawing .

chemical composition by %,maximum:

Grade	C	Si	Mn	Cr	Ni	Cu	P	S
GB/T 3077 38CrSi	0.35-0.43	1.0-1.3	0.3-0.6	1.3-1.6	≤0.03	≤0.03	≤0.035	≤0.035

mechanical properties

Grade	Delivery State	T.S. N/mm2 Min	Y.S. N/mm2 Min	A,% Min	Z,% Min	Hardness, (annealing or tempering) HB,max	Forging ratio	Grain Size (level)	Nonmetal ratio
GB/T 3077 38CrSi	Hot rolled, forged, or heat treatment	960	840	12	50	255	≥ 4:1	≥ 6	≤ 2.0