DIN 1629 Seamless Tubes

DIN 1629 Seamless Tubes
DIN1629, DIN1629 ST37.0, DIN1629 ST44.0, DIN1629 ST52.0, seamless steel tubes, Seamless tube

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

Grade C Si Mn P S
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

Grade Yield Strength
(Mpa) Tensile Strength
(Mpa) Elongation
(%)L Elongation
(%)T
DIN1629 ST37.0 ≥235 350-480 25 23
DIN1629 ST44.0 ≥275 420-550 21 19
DIN1629 ST52.0 ≥355 500-650 21 19
Amounts by which the chemical composition in the product analysis may deviate from the limiting values applicable to the cast analysis

Element Amount 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.