Main material

Standard according

specification

Alloy pipe

Cr5Mo.(P5.STFA25.T5)

GB5310-95

25-560*4-50

15CrMo(P11P12STFA22)

GB9948-88

13CrMo44

ASTMA335/A335M

12Cr1MoV

ASTMA213/213M

P22(10CrMo910)

DIN17175-79

T91P91P9T9

JISG3467-88

WB36

JISG3458-88

Structure pipe

1020354516MnQ345B

GB/T8162-1999

25-560*4-40

Line pipe

B

API

60-560*4.5-40

Hydraulic pillar pipe

27SiMn

GB/T17396-1998

70-377*9-40

Marine pipe

410

GB/T5312-1999

25-426*4-45

Fluid pipe

20Q345

GB/T8163-1999

25-560*4-40

Standard

grade

chemical composition(%)

C

Si

Mn

P

S

Cu

Ni

Mo

Cr

DIN 17175

ST37

ST35.8 

0.07~0.14

0.17~0.37

0.35~0.65

≤0.035

≤0.035

≤0.25

≤0.25

/

≤0.15

ASTM A106

ASTM A53

API  5L

B

0.17~0.24

0.17~0.37

0.35~0.65

≤0.035

≤0.035

≤0.25

≤0.25

/

≤0.25

DIN 17175

ST42

ST45 

0.42~0.50

0.17~0.37

0.50~0.80

≤0.035

≤0.035

≤0.25

≤0.25

/

≤0.25

DIN 1629

Q345

ST52 

0.12~0.20

0.20~0.55

1.20~1.60

≤0.035

≤0.035

≤0.25

≤0.25

/

≤0.25