DIN 17175 is the specification for a heat-resisting seamless steel tube. Grade St35.8 seamless steel tube is used for the construction of boilers, pipelines, pressure vessels and equipment for service up to 600 °C and simultaneous high pressures, where the total stress and the relevant scaling conditions can raise or lower the temperature limit.

Standards: DIN17175

Corresponding: GB5310

O.D: 19mm-350mm


Length: 5.8-12m

St35.8 Tube Chemistry Composition

Material C Si Mn P S
St 35.8 ≤0.17 0.10-0.35 0.40-0.80 ≤0.040 ≤0.040

St35.8 Tube Mechanical Properties

Tensile Strength, MPa Yield Strength, MPa Elongation, %
360-480 235 min 25 min

St35.8 is the commonly used alloy material in the DIN17175  standard used for a high-pressure boiler system, supplied with heat treatment is mainly normalizing or normalizing + tempering, which is a common material in the boiler system. WLD steel offers St35.8 steel seamless tube for boiler and economizer, superheater and reheater system in various sizes and specifications. If you are looking for this material, please contact us or get a quotation. Not only do we have all kinds of sizes, but we also have all kinds of sizes that are hard to find.