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%. |
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