Technical Specification and Application Overview of DIN17175 Seamless Steel Tube

1、 Standards and Materials

Execution standard: DIN17175 is a German industrial standard suitable for seamless steel pipe manufacturing in high-temperature and high-pressure scenarios such as boilers and pipelines.

Common materials:

Carbon steel: such as ST35.8 ST45.8， Suitable for medium and low temperature boiler tubes and fluid transportation.

Alloy steel: such as 15Mo3, used for high-temperature and creep resistant components.

2、 Application Fields

Electricity and boilers: High pressure boiler tubes, superheaters, and heat exchangers, with long-term operating temperatures ≤ 580 ℃.

Petrochemical industry: High temperature and high pressure fluid transportation pipelines and reaction vessels.

Mechanical manufacturing: building structural components, hydraulic systems, and high-strength mechanical parts.

3、 Main performance parameters

Mechanical properties:

Tensile strength: ST45.8 is 335-475 MPa, ST35.8 ≥ 345 MPa 56.

High temperature performance: 15Mo3 has stable oxidation resistance and creep strength at high temperatures.

Dimensional accuracy: Outer diameter tolerance ± 0.3 mm, wall thickness deviation ≤ 10%.

4、 Manufacturing process

Forming process: Hot rolling, cold drawing or extrusion forming are used, and the surface needs to be polished (mechanical/chemical/electrochemical polishing).

Surface treatment: high-temperature oxidation method, ion deposition coating (such as titanium gold coating) to enhance corrosion resistance.

5、 Quality control

Composition testing: Verify whether the content of alloy elements (such as Mo, Cr) meets the standards through spectral analysis.

Appearance requirements: The pipe end should be smooth and free of burrs, and the curvature should meet the "fairly straight" industrial standard.