DIN 2391

DIN 2391 Pipe Chemical Composition(%):

Steel Grade		Chemical Analysis %
Grade	Material NO	C max	Si max	Mn max	P max	S max
St 30 Si	1.0211	0.1	0.3	≤0.55	0.025	0.025
St 30 Al	1.0212	0.1	0.05	≤0.55	0.025	0.025
St 35	1.0305	0.17	0.35	≥0.40	0.025	0.025
St 45	1.0408	0.21	0.35	≥0.40	0.025	0.025
St52	1.058	0.22	0.55	≤1.60	0.025	0.025
Can join the alloy elements: Nb:≤0.03%;Ti:≤0.03%;V:≤0.05%;Nb+Ti+V:≤0.05%

DIN 2391 Pipe Mechanical Properties:

Delivery State		BK		BKW		BKS			GBK		NSK
Grade	Material NO	Tensile Strength	Elongation	Tensile Strength	Elongation	Tensile Strength	Yield Strength	Elongation	Tensile Strength	Elongation	Tensile Strength	Elongation
		(N/mm2)	%	(N/mm2)	%	(N/mm2)	%	%	(N/mm2)	%	(N/mm2)	%
		Min	Min	Min	Min	Min	Min	Min	Min	Min	Min	Min
St 30 Si	1.0211	430	8	380	12	380	280	15	280	30	290-420	215
St 30 Al	1.0212	430	8	380	12	380	280	15	280	30	290-420	215
St 35	1.0305	480	6	420	10	420	315	14	2315	25	340-470	235
St 45	1.0408	580	5	520	8	520	375	12	390	21	440-570	255
St52	1.058	640	4	580	7	580	420	10	490	22	490-630	355

Seamless tubes type-DIN 2391 has high standard dimensional tolerances, high quality surface finish and some special mechanical features. Its material is suitable to welding and cutting fabrication process. Heat treatment makes the tubes easy to fabricate: bending, flaring etc. In accordance with DIN 2391 standards, product lengths are usually between 4-7 m.