GB/T 3077 20SiMn2MoV round bars

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11-May-2024

GB/T 3077 20SiMn2MoV alloy structural steel, is a low carbon martensite quenching steel,with high strength and tenacity, and super hardenability. According to the properties, GB/T 3077 20SiMn2MoV is mainly used for components with long working time at low temperature, heavy load, big section work conditions.

GB/T 3077 20SiMn2MoV round bar

GB/T 3077 20SiMn2MoV can be produced into hot rolled round bars and square bars, cold-drawing bars,forged bars. We henan KUNFENG can supply GB/T 3077 20SiMn2MoV all of shapes.

According to the market needs, henan KUNFENG supply the oversea markets for GB/T 3077 20SiMn2MoV hot rolled round bars OD 6mm -80 mm and 20SiMn2MoV forged round bars OD 80 mm - 1200 mm, also GB/T 3077 20SiMn2MoV forged square bars OD 100- 1200 mm. The OD tolerance is about 0-3 mm 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	Mo	V	Cu	P	S
GB/T 3077 20SiMn2MoV	0.17-0.23	0.9-1.2	2.2-2.6	0.3-0.4	0.05-0.12	≤ 0.3	≤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 20SiMn2MoV	Hot rolled, forged, or heat treatment	1380	-	10	45	269	≥ 4:1	≥ 6	≤ 2.0