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 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 |
|