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DIN 1629 carbon seamless steel pipes

DIN 1629 carbon seamless steel pipes

DIN 1629 is the standard specifies the Seamless Circular Tubes of Non Alloys Steels with Special Quality Requirements.

DIN 1629 applications the overheated boilers, as minimum thickness ferrite and seamless steel pipes, and as heat exchangers via austenitic pipes.

It is used for manufacturing pipeline,vessel,equipment,pipe fittings.
The main products of steel / steel grade:
  • DIN1629 ST37.0
  • DIN1629 ST44.0
  • DIN1629 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 Tickness:1-30mm
  • Length:14000mm max

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
Tensile Strength
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

ASTM A213 T11 Seamless alloy pipes
+ ASTM A335 alloy pipe
ASMT A333 Grade 6 seamless pipes
+ ASTM A333 Alloy pipe

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