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DIN 1629 carbon seamless steel pipes
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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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