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Steel Rail Grades and Chemical Composition
28 Dec , 2024

Steel Rail Grades and Chemical Composition

Railway rail grades are divided into U71Mn, U75V, U77MnCr, U78CrV, U76CrRE, etc. according to different chemical compositions.

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Rail grades and chemical composition

Grade

Chemical Composition

C

Si

Mn

P

S

Cr

V

Al

U71Mn

0.65~0.76

0.15~0.58

0.70~1.20

≤0.030

≤0.025

—

—

≤0.010

U75V

0.71~0.80

0.50~0.80

0.75~1.05

≤0.030

≤0.025

—

0.04~0.12

≤0.010

U77MnCr

0.72~0.82

0.10~0.50

0.80~1.10

≤0.025

≤0.025

0.25~0.40

—

≤0.010

U78CrV

0.72~0.82

0.50~0.80

0.70~1.05

≤0.025

≤0.025

0.30~0.50

0.04~0.12

≤0.010

U76CrRE

0.71~0.81

0.50~0.80

0.80~1.10

≤0.025

≤0.025

0.25~0.35

0.04~0.08

≤0.010


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