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JIS G3454 standard specification

Mar 04, 2024

JIS G3454 standard specification

JIS G3454 carbon steel pipe is used under pressure conditions that limit the maximum temperature to 350°C. If higher pressure piping is required the JIS G 3455 standard should be considered. JIS G3454 steel pipes can be manufactured into seamless steel pipes or resistance welded steel pipes, and the buyer can specify the quality requirements for hot or cold working conditions.

Chemical Composition:

Letter symbol of grade Elongation %
 C  Si  Mn  P  S
 STPG 370  0.25 max.  0.35 max.  0.30 to 0.90  0.040 max.  0.040 max.
 STPG 410  0.30 max.  0.35 max.  0.30 to 1.00  0.040 max.  0.040 max.

Mechanical Property:

Letter symbol of grade Tensile strength Yield point or proof stress Elongation %
kgf/mm2 {N/mm2} kgf/mm2 {N/mm2}  No.11 and No.12 test pieces  No. 5 test pieces No. 4 test piece
 Longitudinal  Transverse  Longitudinal  Transverse
STPG 370 38 {373}min 22{216} min 30 min 25 min 23 min 28 min
 STPG 410  42{412}min  25{245} min  25 min  20 min  19 min  24 min

Tolerances on Outside Diameter and Wall Thickness:

Division Tolerances on outside diameter Tolerances on wall thickness
Hot-finished seamless steel pipe 40 A or under 0.5mm Under 4mm
50A or over up to and incl. 125 A 1% +0.6mm

 

-0.5mm

 

4mm or over

 

+15%

 

-12.5%
150A  1.6mm
200A or over 0.8%
For the pipe of nominal size 350 A or over, the tolerances on outside diameter may be determined by the measurement of the length of circumference. In this case, the tolerances shall be 0.5%.
Cold-finished seamless steel pipe  and electric resistance welded steel pipe 25 A or under 0.3mm Under 3mm
0.3mm

 

3mm or over
10%
32 A or over 0.8%

 

For the pipe of nominal size 350 A or over, the tolerances on outside diameter may be determined by the measurement of the length of circumference. In this case, the tolerances shall be 0.5%.

Casing Manufacturing Process

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