DIN 1629 carbon seamless steel pipes

DIN 1629 Seamless Steel pipe Of Non Alloys Steels are made of unalloyed steels, it's main grades are St 37.0, St44.0, St52.0.

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