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DIN 1629

Standard: DIN1629 Deutsche Industrie Normen
Uses: For manufacture of pipelines,vessels,equipment,pipe fittings and steel structures.

Chemical Composition(%):

 Grade  C  Si  Mn  P  S  Cr  Ni  Cu 
St37.0  =0.17  0.17-0.37  0.35-0.65  =0.025  =0.020  =0.25  =0.25  =0.25 
St44.0  =0.21  0.17-0.37  0.50-0.80  =0.025  =0.020  =0.25  =0.25  =0.25 
St55  0.33-0.41  0.17-0.37  0.50-0.80  =0.025  =0.020  =0.25  =0.25  =0.25 
St52.0  =0.22  =0.55  =1.60  =0.025  =0.020  =0.25  =0.25  =0.25 

Mechanical Properties:

 

Grade  Tensile strength
(MPa) 
Yield strength (Mpa)
not less than
Elongation (%)
not less than
=16mm  >16mm 
St37.0  350-480  235 225 25
St44.0  420-550  275 265 21
St55  540-645  295 285 17
St52.0  500-650  355 345 21


Available Dimension Range:
Cold Finished Seamless Steel Tube and Pipe:F8~114.3*1~20mm
Hot-rolled Steel Tube and Pipe:F114.3~720*5~120mm

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