JIS G3454 carbon steel pipe

JIS G3454 Carbon Steel Pipes

JIS G3454 carbon steel pipes are used for pressure conditions at an limited maximum temperature of 350℃. If you requires for higher pressure pipes shall consider JIS G 3455 standard. JIS G3454 Steel pipe can be manufactured into seamless steel pipe or electric-resistance welded steel tubes, the purchaser may designate the quality requirements on hot finished or cold finished state.
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%.

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