DIN Standards Steel Pipe for Pipeline, Vessel and Equipment Structure Standard DIN1629 Application It is used for manufacturing pipeline, vessel, equipment, pipe fittings and steel structure. Main Steel Tube Grades St37.0, St44.0, St52.0 Chemical Composition

Standard	Grade	Chemical Composition %
		C	Si	Mn	P	S	Cr
DIN 1629	St37.0	≤0.17	/	/	≤0.04	≤0.04	/
	St44.0	≤0.21	/	/	≤0.04	≤0.04	/
	St52.0	≤0.22	≤0.55	≤1.70	≤0.04	≤0.04	/

  Mechanical Properties

Standard	Grade	Mechanical Properties
		Tensile Strength MPa	Yield Strength MPa	Elongation %
DIN 1629	St37.0	350-480	≥235	≥25
	St44.0	420-550	≥255	≥21
	St52.0	550-650	≥270	≥21