JIS Standards
Carbon Steel Pipe for Pressure Pipeline, High Pressure Application and High Temperature Application
Standard
JIS G3454
JIS G3455
JIS G3456
Application
JIS G3454 It is used as carbon steel pipe for pressure pipeline in the condition under 350℃.
JIS G3455 It is used as carbon steel pipe for the pipeline where the temperature is less than 350℃ with high working pressure.
JIS G3456 It is used as carbon steel pipeline in the condition that over 350℃.
Main Steel Tube Grades
STPG 370, STS 370, STPT 370
Chemical Composition
| Grade | Chemical Composition % | ||||
| C | Si | Mn | P | S | |
| STPG 370 | ≤0.25 | ≤0.35 | 0.30-0.90 | ≤0.040 | ≤0.040 |
| STPG 410 | ≤0.30 | ≤0.35 | 0.30-1.00 | ≤0.040 | ≤0.040 |
| STS 370 | ≤0.25 | 0.10-0.35 | 0.30-1.10 | ≤0.035 | ≤0.035 |
| STS 410 | ≤0.30 | 0.10-0.35 | 0.30-1.40 | ≤0.035 | ≤0.035 |
| STS 480 | ≤0.33 | 0.10-0.35 | 0.30-1.50 | ≤0.035 | ≤0.035 |
| STPT 370 | ≤0.25 | 0.10-0.35 | 0.30-0.90 | ≤0.035 | ≤0.035 |
| STPT 410 | ≤0.30 | 0.10-0.35 | 0.30-1.00 | ≤0.035 | ≤0.035 |
| STPT 480 | ≤0.33 | 0.10-0.35 | 0.30-1.00 | ≤0.035 | ≤0.035 |
Mechanical Properties
| Grade | Mechanical Properties | ||
| Tensile Strength MPa | Yield Strength MPa | Elongation % | |
| STPG 370 | ≥370 | ≥215 | 30 |
| STPG 410 | ≥410 | ≥245 | 25 |
| STS 370 | ≥370 | ≥215 | 30 |
| STS 410 | ≥410 | ≥245 | 25 |
| STS 480 | ≥400 | ≥275 | 25 |
| STPT 370 | ≥370 | ≥215 | 30 |
| STPT 410 | ≥410 | ≥245 | 25 |
| STPT 480 | ≥480 | ≥275 | 25 |
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