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JIS3454 / JIS3455 / JIS3456 / JIS3461
JIS G3454 carbon steel pipes are used for pressure conditions at a limited maximum temperature of 350℃. If you require 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.
Specifications:
Grade and Chemical Composition ( ％ )
| Standard | Grade | C | Si | Mn | P | S |
| JIS G3454 | 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 | |
| JIS G3455 | STS 370 | ≤0.25 | 0.10-0.35 | 0.30-1.10 | ≤0.035 | ≤0.035 |
| STS410 | ≤0.30 | 0.10-0.35 | 0.30-1.40 | ≤0.035 | ≤0.035 | |
| STS480 | ≤0.33 | 0.10-0.35 | 0.30-1.50 | ≤0.035 | ≤0.035 | |
| JIS G3456 | 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 property
| Standard | Grade | Tensile strength (Mpa) | Yield strength (Mpa) |
| JIS G3454 | STPG 370 | ≥215 | ≥370 |
| STPG 410 | ≥245 | ≥410 | |
| JIS G 3455 | STS 370 | ≥215 | ≥370 |
| STS 410 | ≥245 | ≥410 | |
| STS 480 | ≥275 | ≥480 | |
| JIS G 3456 | STPT 370 | ≥215 | ≥370 |
| STPT 410 | ≥245 | ≥410 | |
| STPT 480 | ≥275 | ≥480 |
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
3mm or over |
