JIS G3458 Alloy Steel Pipes
The JIS G3458 standard is formulated for heat-resistant alloy steel pipes used as high-temperature fluid conveying pipes for heaters and boiler tubes.
| Steel Grade | C | Si | Mn | S | P | Cr | Mo |
| 15 MoG | 0.12-0.20 | 0.17-0.37 | 0.40-0.80 | 0.015 | 0.025 | 0.25-0.35 |
| Grade | Tensile strength | Yield point(Mpa) | Elongation(%) | Impact(J) |
| (Mpa) | not less than | not less than | not less than | |
| 15MoG | 450-600 | 270 | 22/20 | 40/27 |
| 20MoG | 415-665 | 220 | 22/20 | 40/27 |







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