DIN 17175 St45.8 Seamless Pipes

Seamless carbon-steel pipes manufactured to DIN 17175, grade St45.8, designed for high-temperature and high-pressure applications. These tubes are produced without welded seams to provide uniform strength and reliability where pressure containment and thermal stability are critical.

Key features

• Standard: DIN 17175 (heat-resistant steels for boiler and pressure-vessel service)
• Material grade: St45.8 (as specified by DIN 17175)
• Typical applications: boiler headers, high-temperature pipelines, pressure vessels and other equipment operating up to 600 °C under elevated pressures
• Surface finish: oiled or black-painted to inhibit rust during storage and shipment
• Marking: custom marking available per customer requirements
• Delivery / heat-treatment options: tubes are supplied heat treated throughout their length. Available treatments include normalizing, subcritical annealing, and various hardening & tempering cycles (continuous cooling or isothermal), selected according to the specific steel type and application

Available sizes & supply scope

• Dimensions: manufactured in a range of outer diameters and wall thicknesses to meet project requirements (please confirm exact OD × wall thickness ranges with supplier; specification examples are supplied on request)
• Custom lengths, cut-to-size delivery and additional processing (e.g., end chamfering) can typically be arranged to suit integration into boiler, piping and pressure-vessel systems

Quality & suitability

• Produced for demanding service up to 600 °C where simultaneous high pressure and elevated temperature occur
• Seamless construction reduces the risk of seam-related defects and improves resistance to mechanical and thermal stresses

For procurement teams: specify the required DIN 17175 variant, exact OD × wall thickness, heat-treatment condition, surface finish, and any marking/traceability needs when requesting quotes or samples to ensure the pipes meet your project’s mechanical and thermal performance requirements.