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Gas cylinder pipe

Gas cylinder pipe

STH11、STH12、STH21、STH22、STH31
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Application:

Suitable for manufacturing seamless steel tubes for high pressure vessels（Gas cylinder pipe）

Implementation standards:

JIS G3429-2017 Seamless steel tubes for high pressure gas vessels（Gas cylinder pipe）

The main production grades of steel pipes are as follows:

STH11、STH12、STH21、STH22、STH31

Chemical Composition:

Steel Grade

Chemical Composltion%

C

   Si

   Mn

P max

S max

Ni

Cr

Mo

STH11

   ≤0.50

0.10-0.35

   ≤1.80

0.035

0.035

STH12

0.30-0.41

0.10-0.35

1.35-1.70

0.030

0.030

STH21

0.25-0.35

0.15-0.35

0.40-0.90

0.030

0.030

≤0.25

0.80-1.20

0.15-0.30

STH22

0.33-0.38

0.15-0.35

0.40-0.90

0.030

0.030

≤0.25

0.80-1.20

0.15-0.30

STH11、STH21、STH31，STH11、STH21、STH31，STH11、STH21、STH31，STH11、STH21、STH31，STH11、STH21、STH31，STH11、STH21、STH31，