Pressure Vessel Tubes DIN17175
KWK Steel Co., Ltd [China] 
Application:
This standard including tubes for headers of heat-resistant steels which are used in the construction of boilers, pipe-lines, pressure vessels and equipment for service up to 600°C and simultaneous high pressures, where the tototal stross and the relevant scaling conditions can raise or lower the temperature limit.
Available Steel Grade: St35.8, St45.8, 15Mo3.
Size: OD 6.0-273.1mm, WT 0.5-50mm, Max.Length 13500mm.
Grade and Chemical Composition(%) and Mechanical Properties:
| Standard | Grade | Chemical Composition | Mechanical Property | ||||||||
| C | Si | Mn | P≤ | S≤ | Cr | Mo | (MPa) | (MPa) | (%) | ||
| DIN17175 | St35.8 | ≤0.17 | 0.10~ 0.35 | 0.40~ 0.80 | 0.030 | 0.030 | / | / | 360~480 | ≥235 | ≥25 |
| St45.8 | ≤0.21 | 0.10~ 0.35 | 0.40~ 1.20 | 0.030 | 0.030 | / | / | 410~530 | ≥255 | ≥21 | |
| 15Mo3 | 0.12~ 0.20 | 0.10 ~0.35 | 0.40~ 0.80 | 0.030 | 0.030 | / | 0.25~ 0.35 | 460~600 | ≥270 | ≥22 | |
