DIN 2391 & 1629

DIN 2391 & 1629: German standard
Precision cold drawn seamless steel tube & Seamless Circular Tubes of Non Alloys Steels With Special Quality Requirements;
Application: Oil, Gas and water delivery; Refinery, Boiler and Mechanical equipment manufacturer; structure construction; drilling, ship building and etc.

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DIN 2391 & 1629: German standard
Precision cold drawn seamless steel tube & Seamless Circular Tubes of Non Alloys Steels With Special Quality Requirements;
Application: Oil, Gas and water delivery; Refinery, Boiler and Mechanical equipment manufacturer; structure construction; drilling, ship building and etc.

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DIN2391 Chemical Composition
Grade	C max	Si max	Mn max	P max	S max	Ni max	Cr max	Mo max
St35	0.17	0.35	0.4	0.05	0.05	-	-	-
St45	0.21	0.35	0.4	0.05	0.05	-	-	-
St52	0.22	0.55	1.6	0.05	0.05	-	-	-

DIN2391 Mechanical Property
Grade	Tensile Test MPa
Grade	Min Yiels point	Tensile Strength
St35	215	340 ̴ 470
St45	255	440 ̴ 570
St52	350	490 ̴ 630

Chemical Composition & Mechanical property (DIN1629)
Standard	Grade	Chemical Composition							Mechanical Properties
Standard	Grade	C min	Si min	Mn min	P max	S max	Cr	Mo	(MPa)	(MPa) min	(%) min
DIN1629	St35.8/St37.5	0.17	/	/	0.04	0.04	/	/	350~480	235	25
	St52.0/St52.3	0.22	0.55	0.17	0.04	0.04	/	/	500~560	270	21

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DIN 2391 & 1629

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