JIS G3429 Steel Tubes for Gas Cylinders
KING STEEL provides JIS G3429 steel tubes which can be used as gas and hydraulic cylinder pipe, and in high pressure vessel manufacture. Seamless and welded steel pipes are produced for specified uses. It is our responsibility to choose the most appropriate product for customers with different use purposes, fuel, hydraulic, trailer, station with gas bottle, etc.
KING STEEL provides JIS G3429 steel tubes which can be used as gas and hydraulic cylinder pipe, and in high pressure vessel manufacture. Seamless and welded steel pipes are produced for specified uses. It is our responsibility to choose the most appropriate product for customers with different use purposes, fuel, hydraulic, trailer, station with gas bottle, etc.
JIS G3429 Seamless Steel Tubes
Seamless steel pipe has better mechanical performance and is made for high pressure working conditions, as manufacturing method can be different in some producing progress.JIS G3429 seamless steel tubes are used for the manufacture of seamless steel gas cylinders specified in JIS B 8230 and JIS B 8241.
JIS G3429 Steel Tube Manufacturing
(1) Manufactured in open-hearth furnace or electric furnace(Seamless).
(2) The tubes is manufactured with no heat treatment.
JIS G3429 Steel Tube Chemical Composition:
Class
|
C
|
Si
|
Mn
|
P
|
S
|
Ni
|
Cr
|
Mo
|
STH11
|
0.50 max
|
0.10~0.35
|
1.80 max
|
0.035max
|
0.035max
|
-
|
-
|
-
|
STH12
|
0.30~0.41
|
0.10~0.35
|
1.35~1.70
|
0.030max
|
0.030max
|
-
|
-
|
-
|
STH21
|
0.25~0.35
|
0.15~0.35
|
0.40~0.90
|
0.030max
|
0.030max
|
0.25 max
|
0.80~1.20
|
0.15~0.30
|
STH22
|
0.33~0.38
|
0.15~0.35
|
0.40~0.90
|
0.030max
|
0.030max
|
0.25 max
|
0.80~1.20
|
0.15~0.30
|
STH31
|
0.35~0.40
|
0.10~0.50
|
1.20~1.50
|
0.030max
|
0.030max
|
0.50~1.00
|
0.30~0.60
|
0.15~0.25
|
JIS G3429 Steel Tube Tolerances
Tolerance on outside diameter
|
Tolerance on wall thickness
|
Tolerance on wall thickness disparity
|
Tolerance on length
|
1%
|
+30%
|
Within 20% of the nominal wall thickness
|
>+30mm
0
|