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St37 Seamless Tube 88.9mm Diameter

St37 Seamless Tube 88.9mm Diameter

St37 material seamless tube specification:OD:13 7mm-323 8mm WT:2mm-85mmLength:6

Product Introduction

​​​​​​DIN 1629 seamless pipes standard includes 3 basic steel grades (ST37, ST44, ST52.), this standard specifies the Seamless Circular Tubes of Non Alloys Steels that are used in construction of chemical plant, pressure vessels, pipe system and general mechanical and engineering purposes. Din 1629 seamless steel tubes and pipes are suitable for gas fusion welding, arc welding, flash butt welding, electric pressure welding and gas pressure welding. 

DIN 1629 Steel Pipe Chemical Composition:

Chemical Composition(%) 
Steel Grade C Si Mn P S
St37 ≤0.17 - -

≤0.035

 

≤0.035
St44 ≤0.21 - - ≤0.035 ≤0.035
St52.0 ≤0.22 ≤0.55 ≤1.60 ≤0.035 ≤0.035

DIN 1629 Steel Pipe Mechanical Property:

 Mechanical Properties
Steel Grade Tensile strength(Mpa) Yield point(Mpa) Elongation(%)L Elongation(%)T
St37 350-480 ≥235 ≥25 ≥23
St44 420-550 ≥275 ≥21 ≥19
St52.0 500-650 ≥355 ≥21 ≥19

DIN 1629 Steel Pipe Equivalent Steel Grade:

DIN 1629 EN BS NFA 49.210/49.112 ASTM 53
Grade St 37 EN 10216.1Grade P235 T1 Grade TU 37 B TU E 220 A Grade A
Grade St 44 EN 10216.1Grade P275T1 Grade TU 42 B TU E 235 A Grade B
Grade St 52-0 EN 10216-3Grade P355N NFA Grade P355N ASME SA 381 Grade Y 52

 

Elevated Temperature Upper Yield Stress Values Of DIN 1629 Steel Pipe

 

Steel Grade Yield stress value by working temperature(Thickness increasing)
50℃ 200℃ 250℃ 300℃
St 37 235-215 185-170 165-150 140-130
St 44 275-255 215-200 195-180 165-155
St 52 355-335 248-230 225-210 195-185

 

  • St37 material seamless tube specification:

  • OD: 13.7mm-323.8mm                                                 

  • WT: 2mm-85mm

  • Length: 6m-12m or as required

  • Application: Pipeline steel pipe, vessel steel pipe, fluid pipe for low&medium pressure boiler

  • Supplementary Technology: 

  • Tensile test, flattening test, leak tightness test, surface inspection, product analysis. Beveled end, plain end, varnished, or adding plastic caps as per customer’s requirements

  • Surface: Bared or painted, galvanized or with oiled or client option.

  • Delivery state: Hot Rolled, Cold Drawn

  • Steel Grade: St37, St44, St52



 

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