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DIN 1629 Special Seamless Steel Tube

The special seamless steel tube reaches DIN 1629 standard. This alloy steel tubing contains a large number of other chemical elements, which helps to improve mechanical property. Usually, adding less than 5% elements may increase strength and hardenability, and adding more than 5% elements can create special properties, like corrosion resistance and extreme temperature stability.

To meet the requirements for excellent quality, the industrial pipe is made of ST37.0, ST44.0 or ST52.0 steel. The seamless steel tube is extensively applied in the manufacture of pipeline, vessel, equipment, pipe fitting and so on.

Parameters
1. Standard: DIN 1629
2. Steel grade: ST37.0, ST44.0, ST52.0
3. Delivery condition: Hot rolling
4. Outer diameter: 70MM-610MM
5. Wall thickness: 6MM-35MM
6. Tolerance: DIN 1629 standard
7. Length: Customization
8. Certificate: EN 10204/3.1

Delivery Condition

Steel grade Delivery condition
ST37 Hot rolling
ST44 Hot rolling
ST52 Hot rolling

Chemical Composition (Heat Analysis)%

Steel grade C Si Mn P S
Max. Max. Max.
ST37 0.17 - - - - 0.040 0.040
ST44 0.21 - - - - 0.040 0.040
ST52 0.22 - - - - 0.040 0.035

Mechanical Property of Seamless Steel Tube

Steel grade Min. yield strength (Mpa) Tensile strength (Mpa) Elongation
Min. %
T(mm) I
≤16 >16
≤40
ST37 235 225 350-480 25
ST44 275 265 420-550 21
ST52 355 345 500-650 21
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