JIS G3454 Standard Specification
The JIS G3454 standard specifies carbon steel pipes designed for use under pressure conditions where the maximum temperature is limited to 350°C. For applications requiring higher pressure, the JIS G3455 standard should be considered as an alternative. These steel pipes can be manufactured in either seamless or resistance-welded forms, and buyers may specify whether they require materials suitable for hot or cold working conditions.
Chemical Composition:
| Grade Letter Symbol |
Chemical Composition (%) |
| C |
Si |
Mn |
P |
S |
| STPG 370 |
0.25 max. |
0.35 max. |
0.30–0.90 |
0.040 max. |
0.040 max. |
| STPG 410 |
0.30 max. |
0.35 max. |
0.30–1.00 |
0.040 max. |
0.040 max. |
Mechanical Properties:
| Grade Letter Symbol |
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 |
Dimensions Tolerances:
| Division |
Tolerances on Outside Diameter |
Tolerances on Wall Thickness |
| Hot-finished Seamless Steel Pipe |
40 A or under: 0.5 mm |
Under 4 mm: ±0.6 mm / -0.5 mm |
| 50 A or over up to and including 125 A: 1% |
4 mm or over: +15% / -12.5% |
| 150 A: 1.6 mm |
200 A or over: 0.8%
For nominal sizes of 350 A or larger, diameter tolerances can be measured by circumference length, with a tolerance of 0.5% in such cases. |
| Cold-finished Seamless and Electric Resistance Welded Pipes |
25 A or under: 0.3 mm |
Under 3 mm: 0.3 mm
3 mm or over: 10% |
32 A or over: 0.8%
For nominal sizes of 350 A or larger, diameter tolerances can be measured by circumference length, with a tolerance of 0.5% in such cases. |
These specifications ensure that JIS G3454 steel pipes meet strict quality and performance requirements, making them suitable for a wide range of industrial applications. The standard also provides clear guidelines for dimensional accuracy, ensuring reliable performance under various operating conditions. Whether used in construction, manufacturing, or infrastructure projects, these pipes are designed to deliver durability and safety in high-pressure environments.
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