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DIN 17174-85 SEAMLESS CIRCULAR TUBES
This standard applies to welded circular tubes made carbon and alloy steels with low temperature toughness, as listed in table1, for low temperature applications. These tubes are predominantly used in the construction of chemical plant, vessels, pipework and for general mechanical engineering purposes.
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| steel grade | % by mass | ||||||||||
| symbol | Material number | C max | Si max | Mn | P max | S max | Al min | Mo max | Nb max | Ni | V max |
| TTSt35N | 1.0356 | 0.17 | 0.35 | min 0.40 | 0.030 | 0.025 | 0.020 | - | - | - | - |
| TTSt35V | |||||||||||
| 11MnNi53 | 1.6212 | 0.14 | 0.50 | 0.70 to 1.50 | 0.030 | 0.025 | 0.020 | - | 0.05 | 0.30 to 0.85 | 0.05 |
| 13MnNi63 | 1.6217 | 0.18 | 0.50 | 0.85 to 1.65 | 0.030 | 0.025 | 0.020 | - | 0.05 | 3.25 to 3.75 | 0.05 |
| 10NI14 | 1.5637 | 0.15 | 0.35 | 0.30 to 0.80 | 0.025 | 0.020 | - | - | - | 3.25 to 3.75 | 0.05 |
| 12NI19 | 1.5680 | 0.15 | 0.35 | 0.30 to 0.80 | 0.025 | 0.020 | - | - | - | 4.50 to 5.30 | 0.05 |
| X8Ni9 | 1.5662 | 0.10 | 0.35 | 0.30 to 0.80 | 0.025 | 0.020 | - | 0.10 | - | 8.00 to 10.00 | 0.05 |
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