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DIN 17172-78 Steel Pipes For Pipe Lines
These conditions of delivery apply to seamless and to welded pipes made from the unalloyed and low alloy steels specified in Table 1 for the construction of longdistance pipelines
Description
1.Chemical composition
| Grade | Mfg.process | Chemical composition % | |||||||
C (max) | Si (max) | Mn | P (max) | S (max) | Ni | Cr | Mo | ||
| As Rolled or normalized steel | |||||||||
| StE210.7 | S,E,A | 0.17 | 0.45 | 0.35min | 0.040 | 0.035 | - | - | - |
| StE240.7 | S,E,A | 0.17 | 0.45 | 0.40min | 0.040 | 0.035 | - | - | - |
| StE290.7 | S,E,A | 0.22 | 0.45 | 0.50-1.10 | 0.040 | 0.035 | - | - | - |
| StE320.7 | S,E,A | 0.22 | 0.45 | 0.70-1.30 | 0.040 | 0.035 | - | - | - |
| StE360.7 | S,E,A | 0.22 | 0.55 | 0.90-1.50 | 0.040 | 0.035 | - | - | - |
| StE385.7 | S,E,A | 0.23 | 0.55 | 1.00-1.50 | 0.040 | 0.035 | - | - | - |
| StE415.7 | S,E,A | 0.23 | 0.55 | 1.00-1.50 | 0.040 | 0.035 | - | - | - |
2.Mechanical property
| Grade | Material number | Min Yield point | Tensile strength | Remarks (similar to JIS) | Possibility temperature |
| StE210.7 | 1.0307 | 205 | 325-440 | (STPG370) | |
| StE240.7 | 1.0457 | 235 | 370-490 | - | |
| StE290.7 | 1.0484 | 275 | 420-540 | - | |
| StE320.7 | 1.0409 | 325 | 460-580 | - | |
| StE360.7 | 1.0582 | 360 | 510-630 | - | |
| StE385.7 | 1.8970 | 380 | 530-680 | - | |
| StE415.7 | 1.8972 | 410 | 550-770 | - |
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