
DIN 1629 carbon seamless steel pipes
DIN 1629 is the standard specifies the Seamless Circular Tubes of Non Alloys Steels with Special Quality Requirements.
The main products of steel grade is DIN1629 ST37.0, DIN1629 ST44.0, DIN1629 ST52.0
DIN 1629 applications the overheated boilers, as minimum thickness ferrite and seamless steel pipes, and as heat exchangers via austenitic pipes.
Application:
It is used for manufacturing pipeline, vessel, equipment, pipe fittings.
The main products of steel / steel grade: DIN1629 (ST37.0, ST44.0, and ST52.0) Packing: Bare/bundles/crates/crate protection at the both sides of tubes or as per customers’ requirements.
Size range (mm):
Out diameter: 10-324mm
Wall thickness: 1-30mm
Length: 14000mm max
Grade list of DIN1629:
DIN1629 ST37.0
DIN1629 ST44.0
DIN1629 ST52.0
Note:
DN — Nominal Diameter
NPS —Nominal Pipe Size
Chemical Compositions(%) of DIN1629
Grade | C | Si | Mn | P | S |
ST37.0 | ≤0.17 | / | / | ≤0.040 | ≤0.040 |
ST44.0 | ≤0.21 | / | / | ≤0.040 | ≤0.040 |
ST52.0 | ≤0.22 | ≤0.55 | ≤1.70 | ≤0.040 | ≤0.035 |
Mechanical Properties of DIN1629
Grade | Yield Strength (Mpa) |
Tensile Strength (Mpa) |
Elongation (%)L |
Elongation (%)T |
ST37.0 | ≥235 | 350-480 | 25 | 23 |
ST44.0 | ≥275 | 420-550 | 21 | 19 |
ST52.0 | ≥355 | 500-650 | 21 | 19 |
Please note the meaning of below abbreviation in table 2:
- HR----Hot Rolled
- CW----Cold Worked
- SR----Stress Relieved
- A----Annealed
- N----Normalized