Attention: The DIN 17458 standard has been updated and replaced by the European regulation EN 10216-5.
Scope of Application
The DIN 17458 technical regulation sets strict requirements for the production of seamless circular tubes made of austenitic stainless steel grades. These products, supplied by EV Group China, are intended for use in critical components of energy and chemical equipment, including steam generators, collector systems, pressure vessels, and high-intensity pipelines. The products are designed for stable operation at temperatures up to 600 °C, provided that design loads are observed and corrosive-oxidizing environments are taken into account.
Within the specification, heat-resistant materials include steels that maintain high mechanical strength and resistance to deformation under prolonged thermal exposure up to 600 °C.
Chemical Composition of Steels According to the Standard
| Steel | WNr | C | Cr | Mo | Ni | Other |
|---|---|---|---|---|---|---|
| X 5 CrNi 18 10 | 1.4301 | <0.07 | 17.0-19.0 | – | 8.5-10.5 | – |
| X 2 CrNi 19 11 | 1.4306 | <0.030 | 18.0-20.0 | – | 10.0-12.5 | – |
| X 2 CrNiN 18 10 | 1.4311 | <0.030 | 17.0-19.0 | – | 8.5-11.5 | N 0.12-0.22 |
| X 6 CrNiTi 18 10 | 1.4541 | <0.08 | 17.0-19.0 | – | 9.0-12.0 | Ti 5x%C up to 0.80 |
| X 6 CrNiNb 18 10 | 1.4550 | <0.08 | 17.0-19.0 | – | 9.0-12.0 | Nb 10x %C up to 1.00 |
| X 5 CrNiMo 17 12 2 | 1.4401 | <0.07 | 16.5-18.5 | 2.0-2.5 | 10.5-13.5 | – |
| X 2 CrNiMo 17 13 2 | 1.4404 | <0.030 | 16.5-18.5 | 2.0-2.5 | 11.0-14.0 | – |
| X 6 CrNiMoTi 17 12 2 | 1.4571 | <0.08 | 16.5-18.5 | 2.0-2.5 | 10.5-13.5 | Ti 5x%C up to 0.80 |
| X 6 CrNiMoNb 17 12 2 | 1.4580 | <0.08 | 16.5-18.5 | 2.0-2.5 | 10.5-13.5 | Nb 10x %C up to 1.00 |
| X 2 CrNiMoN 17 13 3 | 1.4429 | <0.030 | 16.5-18.5 | 2.5-3.0 | 11.5-14.5 | N 0.14-0.22; S<0.025 |
| X 2 CrNiMo 18 14 3 | 1.4435 | <0.030 | 17.0-18.5 | 2.5-3.0 | 12.5-15.0 | S<0.025 |
| X 5 CrNiMo 17 13 3 | 1.4436 | <0.07 | 16.5-18.5 | 2.5-3.0 | 11.0-14.0 | S<0.025 |
| X 2 CrNiMoN 17 13 5 | 1.4439 | <0.030 | 16.5-18.5 | 4.0-5.0 | 12.5-14.5 | N 0.12-0.22; S<0.025 |