Table 1 Chemical composition and... | Emerald Publishing

Table 1

Chemical composition and mechanical properties of TB/T 2344.1-2020

Steel	Composition/%					Mechanical properties
Steel	C	Si	Mn	P	S	Tensile strength Rm(MPa)	Elongation A (%)	Hardness of the rail running surface (HB)
U71Mn	0.65∼	0.15∼	0.70∼	≤0.025	≤0.025	≥880	≥10	260∼300
U71MnH	0.80	0.58	1.20	≤0.025	≤0.025	≥1080	≥10	320∼380
U75V	0.71∼	0.50∼	0.70∼	≤0.025	≤0.025	≥980	≥10	280∼320
U75VH	0.80	0.80	1.05	≤0.025	≤0.025	≥1180	≥10	340∼400

Steel	Composition/%					Mechanical properties
Steel	C	Si	Mn	P	S	Tensile strengthRm(MPa)	Elongation A (%)	Hardness of the rail running surface (HB)
U71Mn	0.65∼	0.15∼	0.70∼	≤0.025	≤0.025	≥880	≥10	260∼300
U71MnH	0.80	0.58	1.20	≤0.025	≤0.025	≥1080	≥10	320∼380
U75V	0.71∼	0.50∼	0.70∼	≤0.025	≤0.025	≥980	≥10	280∼320
U75VH	0.80	0.80	1.05	≤0.025	≤0.025	≥1180	≥10	340∼400

Source(s): Table courtesy of TB/T 2344.1-2020