Seamless Steam Boiler Steel Tubes DIN17175 Pressure Vessels and Boilers


Seamless steel tubes for pressure purposes-Technical delivery conditions
Non-alloy steel tubes with specified elevated temperature properties

Applications: for pipelines of boilers industry, vessel equipment

Size range: O.D.:6-323mm W.T.:1-30mm L: according to customer requirement

Chemical composition
Chemical composition
Steel grade
C
Si
Mn
P
S
Cr
Mo
Steel name



max
max


St35.8
0.17
0.10-0.35
0.40-0.80
0.003
0.003
/
/
St45.8
0.21
0.10-0.35
0.40-1.20
0.003
0.003
/
/
15Mo3
0.12-0.20
0.10-0.35
0.40-0.80
0.003
0.003
/
0.25-0.35
Note: Special steel grade is also available, according to customer request.

Mechanical properties
Steel Grade
Tensile properties
Tensil
Elongation A min.%
Mpa
Mpa
St35.8
≥235
350-480
≥25
St45.8
≥255
410-530
≥21
15M