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Standard for Seamless circular unalloyed steel tubes subject to special requirements.
Application:
These tubes are predominantly used in the construction of chemical plant,vessels,pipework and for general mechanical engineering purposes.
Details
Size:
O.D.: 6.0-813.0mm W.T.: 1.0-110.0mm Length: Max.12000mm
Steel Grade and Chemical Composition(%)
| Standard |
Grade |
C |
Si |
Mn |
P |
S |
Cr |
| DIN1629 |
St37/St37.5 |
≤0.17 |
/ |
/ |
≤0.04 |
≤0.04 |
/ |
| St52/St52.3 |
≤0.22 |
≤0.55 |
0.17 |
≤0.04 |
≤0.04 |
/ |
| St44 |
≤0.21 |
/ |
/ |
≤0.04 |
≤0.04 |
/ |
Mechanical Properties
| Standard |
Grade |
Tensile Strength(Mpa) |
Yield Point(Mpa) |
Elongation(A%) |
| DIN1629 |
St37/St37.5 |
350-480 |
≥235 |
≥25 |
| St52/St52.3 |
500-560 |
≥355 |
≥21 |
| St44 |
420-550 |
≥275 |
≥21 | | 
