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Standard for Seamless Tubes of Heat-resistant Steels.
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 total stross and the relevant scaling conditions can raise or lower the temperature limit.
Details
Size:
O.D.: 6.0-820.0mm W.T.: 1.0-80.0mm Length: Max.17000mm
Steel Grade and Chemical Composition(%)
| Standard |
Grade |
C |
Si |
Mn |
P |
S |
Cr |
Mo |
| DIN17175 |
St35.8 |
≤0.17 |
0.10-0.35 |
0.40-0.80 |
≤0.030 |
≤0.030 |
/ |
/ |
| St45.8 |
≤0.21 |
0.10-0.35 |
0.40-1.20 |
≤0.030 |
≤0.030 |
/ |
/ |
| 15Mo3 |
0.12-0.20 |
0.10-0.35 |
0.40-0.80 |
≤0.030 |
≤0.030 |
/ |
0.25-0.35 |
Mechanical Properties
| Standard |
Grade |
Tensile Strength(Mpa) |
Yield Point(Mpa) |
Elongation(A%) |
| DIN17175 |
St35.8 |
360-480 |
≥235 |
≥25 |
| St45.8 |
410-530 |
≥255 |
≥21 |
| 15Mo3 |
450-600 |
≥270 |
≥22 |
Other steel grade like 17Mn4,19Mn5,13CrMo44,10CrMo910,14MoV63,X20CrMoV121 are also available. |
