DIN · DIN 17458

DIN 17458: Specification for Seamless Austenitic Steel Tubes for Pressure Purposes

Attention: The DIN 17458 standard has been updated and replaced by the European regulation EN 10216-5.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

OtherNiMoCrCWNrSteel
-10.0-12.5-18.0-20.0<0.0301.4306X 2 CrNi 19 11
-11.0-14.02.0-2.516.5-18.5<0.0301.4404X 2 CrNiMo 17 13 2
S<0.02512.5-15.02.5-3.017.0-18.5<0.0301.4435X 2 CrNiMo 18 14 3
N 0.14-0.22; S<0.02511.5-14.52.5-3.016.5-18.5<0.0301.4429X 2 CrNiMoN 17 13 3
N 0.12-0.22; S<0.02512.5-14.54.0-5.016.5-18.5<0.0301.4439X 2 CrNiMoN 17 13 5
N 0.12-0.228.5-11.5-17.0-19.0<0.0301.4311X 2 CrNiN 18 10
-8.5-10.5-17.0-19.0<0.071.4301X 5 CrNi 18 10
-10.5-13.52.0-2.516.5-18.5<0.071.4401X 5 CrNiMo 17 12 2
S<0.02511.0-14.02.5-3.016.5-18.5<0.071.4436X 5 CrNiMo 17 13 3
Nb 10x %C up to 1.0010.5-13.52.0-2.516.5-18.5<0.081.4580X 6 CrNiMoNb 17 12 2
Ti 5x%C up to 0.8010.5-13.52.0-2.516.5-18.5<0.081.4571X 6 CrNiMoTi 17 12 2
Nb 10x %C up to 1.009.0-12.0-17.0-19.0<0.081.4550X 6 CrNiNb 18 10
Ti 5x%C up to 0.809.0-12.0-17.0-19.0<0.081.4541X 6 CrNiTi 18 10