DIN 1629 Seamless Tubes

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

DIN 1629 Size range (mm):

  • Outer Dimensions: 6.0mm-219.0mm
  • Wall Thickness: 1.0mm-30 mm
  • Length: max 12000mm

Application:

  • It is used for manufacturing pipeline,vessel,equipment,pipe fittings .
  • These tubes are prodominantly used in construction of chemical plant, vessels, pipework and for genearl mechanical engineering purpose.

The main products of steel / steel grade:

  • DIN1629 ST37.0
  • DIN1629 ST44.0
  • DIN1629 ST52.0

Delivery Condition:

  • Heat treatment,Annealed, Normalized, Normalized and Tempered

Surface treatment:

  • Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting
  • Painting as requested.

Chemical Compositions(%) of DIN1629

GradeCSiMnPS
DIN1629 ST37.0≤0.17//≤0.040≤0.040
DIN1629 ST44.0≤0.21//≤0.040≤0.040
DIN1629 ST52.0≤0.22≤0.55≤1.70≤0.040≤0.035

 Mechanical Properties of DIN1629

GradeYield Strength
(Mpa)
Tensile Strength
(Mpa)
Elongation
(%)L
Elongation
(%)T
DIN1629 ST37.0≥235350-4802523
DIN1629 ST44.0≥275420-5502119
DIN1629 ST52.0≥355500-6502119
Amounts by which the chemical composition in the product analysis may deviate from the limiting values applicable to the cast analysis
ElementAmount by which the product analysis may deviate from
 the limiting values applicable to the analysis % by mass
C+0,02
P+0,010
S+0,010
N+0,001¹)
¹) A contant in excess of the maximum value stated is permitted if a phosphorus content less than the maximum specified by 0,005% P per 0,001% N is observed. However, the nitrogen contant shall not exceed a value of 0,012% in the cast analysis and 0,014% in the product analysis (this does not apply to the RR type of deoxidization.

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