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DIN 17177-79 electrically resitance steel pipe
This Standard applies to electric resistance or induction welded tubes 1) manufactured from the heat-resisting selection o steels2) used in part for temperatures up to 530℃ and at simultaneous high pressures, where the total stress and the relevant scaling conditions can raise or lower the temperature limit.
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1.Chemical composition %
| Grade | Mfg.procedd | chemical composition | ||||||||
| C | Si | Mn | P(max) | S(max) | Ni | Cr | Mo | others | ||
| St37.8 | E | 0.17 | 0.10-0.35 | 0.40-0.80 | 0.040 | 0.040 | - | - | - | - |
| St42.8 | E | 0.21 | 0.10-0.35 | 0.40-1.20 | 0.040 | 0.040 | - | - | - | - |
| 15Mo3 | E | 0.12-0.20 | 0.10-0.35 | 0.40-0.80 | 0.035 | 0.035 | - | - | 0.25-0.35 | - |
2.Mechanical property
| Grade | Materia number | Tensile test MPa | Remarks (similar to JIS) | possibility temperature | |
| Min Yield point | Tensile Strength | ||||
St37.8 | 1.0315 | 235 | 360-480 | (STPG370) | |
| St42.8 | 1.0498 | 255 | 410-530 | (STPT410,STB410) | |
| 15Mo3 | 1.5415 | 275 | 450-600 | - | |
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