DIN 17172 STE210.7 STE240.7,STE290.7 seamless steel tubes/steel pipes usually are untreated, after a hot forming operation by rolling, pressing or drawing, on condition that said hot forming operation achieves an irreproachable structure condition with adequate uniformity without any further treatment.STE210.7 STE240.7,STE290.7 seamless steel tubes produced by cold rolled or cold drawn must be normalized in every case. The STE210.7 seamless pipe,STE240.7,seamless pipe,STE290.7seamless pipe manufactured under DIN 17172 generally are used for pipe lines for the transport of combustible fluids and gases.
DIN17172 STE210.7, STE240.7,STE290.7 seamless steel pipe chemical composition
| Steel grade | Type of deoxidation | Chemical composition in % by wt | |||||
| Symbol | Material number | C | Si | Mn | P | S | |
| max | max | ||||||
| StE 210.7 | 1.0307 | R=killed | 0.17 | 0.45 | >=0.35 | 0.040 | 0.035 |
| StE 240.7 | 1.0457 | R=killed | 0.17 | 0.45 | >=0.45 | 0.040 | 0.035 |
| StE 290.7 | 1.0484 | RR=specially killed | 0.22 | 0.45 | 0.5-1.1 | 0.040 | 0.035 |
DIN17172 STE210.7, STE240.7,STE290.7 seamless steel pipe mechanical property
| Steel grade | Yield Point | Tensile strength N/mm2 | Elongation | Impact energy At 0°C | ||
| Symbol | Material number | OD up to 500 | OD over 500 | |||
| N/mm2 min | % min | / min | ||||
| StE 210.7 | 1.0307 | 210 | 320 to 440 | 26 | 47 | 27 |
| StE 240.7 | 1.0457 | 240 | 320 to 440 | 24 | 47 | 27 |
| StE 290.7 | 1.0484 | 290 | 420 to 540 | 23 | 47 | 27 |
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