DIN 17175 Grade St45.8 Tube

  • Standards: DIN17175
  • O.D: 19mm-350mm
  • W.T:1.5mm-50mm
  • Length: 5.8-12m

DIN 17175 is the specification for a heat-resisting seamless steel tube. Grade St45.8 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.

St45.8 Tube Chemistry Composition

Material C Si Mn P S
St 35.8 ≤0.21 0.10-0.35 0.40-1.2 ≤0.030 ≤0.030

St45.8 Tube Mechanical Properties

Tensile Strength, MPa Yield Strength, MPa Elongation, %
410-530 255 min 21 min

Grade St45.8  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 is a leading St45.8 steel seamless tube supplier 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.