U78CrVH - GB /T 2585-2021

Grade	U78CrVH
Corresponding Standard	GB /T 2585-2021 Hot-rolled steel rails for railway
Classification	Alloy Steel

U78CrVH Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	Ti	V	Nb	Al	Sn	Sb	More
Minimum Value	0.72	0.5	0.7	-	-	0.3	-	-	-	-	0.04	-	-	-	-	Ni+Cu≤0.2；Gu+10Sn≤0.35；Cr+Ni+Mo+Cu≤0.35
Maximum Value	0.82	0.8	1.05	0.025	0.025	0.5	0.1	0.15	0.02	0.025	0.12	0.01	0.01	0.03	0.02	Ni+Cu≤0.2；Gu+10Sn≤0.35；Cr+Ni+Mo+Cu≤0.35

U78CrVH Mechanical Properties

Heat Treatment or Condition	Tensile Strength σ_b Mpa	Elongation or Extension Rate δ %	Hardness HBW
Heat Treatment	≥1280	≥10①	370~420(HBW10/3000)②③

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