DIN 1629 Seamless Tubes

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


Din 1629 seamless steel pipes application fields are: chemical plant, vessels, pipework construction and for common mechanical engineering purposes. Normally DIN 1629 standard are manufactured with no limiting working pressure values. Working temperature is limited below 300℃.

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.

Application:

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

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

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