55SiMnVB A77552 - GB /T 1222-2025

55SiMnVB Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	V	B
Minimum Value	0.52	0.7	1	-	-	-	-	-	0.08	0.0008
Maximum Value	0.6	1	1.3	0.025	0.02	0.35	0.35	0.2	0.16	0.0035

55SiMnVB Mechanical Properties

Heat Treatment or Condition	Tensile Strength σ_b Mpa	Specified Plastic Yield Strength Rp_0.2 Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %
Quenched in oil at 860±20°C and tempered at 460±50°C	≥1375	ReL ≥1225	≥5	≥30

55SiMnVB Corresponding Standards(Same grade name, different standards)

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