DIN 17175 St45.8 High-Pressure Boiler Tubes Description
ST45.8 high-pressure boiler tube is a specialized steel material used for heating surface pipes in high-pressure boilers. It is primarily applied in high-pressure boiler systems with operating pressures above 9.8 MPa and temperatures ranging from 450°C to 650°C. It is commonly found in economizers, superheaters, reheaters, and pipelines in the petrochemical industry.
Heat treatment temperature of DIN 17175 St45.8 seamless steel tubes
| Steel Grade | Thermal processing ℃ | Normalizing℃ | Tempering | ||
| Grade | Material number | Quenching temperature ℃ | Tempering temperature ℃ | ||
| St45.8 | 1.0405 | 1100 to 850°C | 870-900 | - | - |
Chemical composition of DIN 17175 St45.8 seamless steel tubes
| Grade | Chemical composition | |||||
| C | Si | Mn | P,S | Cr | Mo | |
| St45.8 | ≤0.21 | 0.10-0.35 | 0.40-1.20 | ≤0.030 | / | / |
Mechanical property of DIN 17175 St45.8 seamless steel tubes
| Standard | Grade | Tensile Strength(MPa) | Yield Strength(MPa) | Elongation(%) |
| DIN 17175 | St45.8 | 410-530 | ≥255 | ≥21 |
Supply status
The 17175 St45.8 Seamless Steel Tubes Will be delivered through a suitable heat treatment. heat treatment includes:
– Normalizing
– Annealing
– Tempering; from the quenching temperature, it is not cold, but then tempered
– Adjust the mass by the isothermal transformation method.
DIN17175 St45.8 Seamless Steel Tubes Factory
