High Pressure Vessel, Gas Cylinder Pipes

Standard:
GB 18248--------- China National Standard
JIS G3429-------- Japanese Industrial Standards

Purpose:
For the manufacture of pressure vessels, gas cylinders seamless.

The main production steel grades:
37Mn34Mn2V30CrMo35CrMoSTH11STH12STH21STH22等。

Mechanical properties:

Standard

Grade

Tensile strength (MPa)

Yield strength (MPa)

Elongation (%)

GB18248

37Mn

≥750

≥630

≥16

34Mn2V

≥745

≥530

≥16

30CrMo

≥930

≥785

≥12

35CrMo

≥980

≥835

≥12

 

Chemical composition

Standard

model

Chemical Composition

C

Si

Mn

PS

Cu

Ni

Mo

Cr

V

GB18248

37Mn

0.34~0.40

0.10~0.30

1.35~1.65

≤0.030

≤0.20

≤0.30

/

≤0.30

/

34Mn2V

0.30~0.37

0.17~0.37

1.40~1.75

≤0.030

≤0.20

≤0.30

/

≤0.30

0.07~0.12

30CrMo

0.26~0.34

0.17~0.37

0.40~0.70

≤0.030

≤0.20

≤0.30

0.15~0.25

0.80~1.10

/

35CrMo

0.32~0.40

0.17~0.37

0.40~0.70

≤0.030

≤0.20

≤0.30

0.15~0.25

0.80~1.10

/

JIS G3429

STH11

≤0.50

0.10~0.35

≤1.80

≤0.035

/

/

/

/

/

STH12

0.30~0.41

0.10~0.35

1.35~1.70

≤0.030

/

/

/

/

/

STH21

0.25~0.35

0.15~0.35

0.40~0.90

≤0.030

/

≤0.25

0.15~0.30

0.80~1.20

/

STH22

0.33~0.38

0.15~0.35

0.40~0.90

≤0.030

/

≤0.25

0.15~0.30

0.80~1.20

/