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DIN 2391/EN 10305-1 seamless steel pipe

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DIN 2391/EN 10305-1 seamless steel pipe

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Standard: DIN 2391/EN 10305-1
Cold drawn precision seamless steel Precision cold drawn seamless steel tube
Application:	Automotive tube / from for Atuo USD; machinery use / for machinery USE; cylinder tube / Oil Cylinder Tube; motorcycle shock absorber pipe / Motorcycle shock reducer steel tubes; automotive shock absorbers within the cylinder / Auto shock reducer inner cylinder
Size (mm):	OD OD :16-168 wall thickness WT :1-23 length L: max 14000

Steel and chemical composition of Grade and Chemical Composition (%):

Trademark	Chemical composition (%)
C max	Si max	Mn	P max	S max
St 35	0.17	0.35	≥ 0.40	0.025	0.025
St 45	0.21	0.35	≥ 0.40	0.025	0.025
St 52	0.22	0.55	≤ 1.60	0.025	0.025

Steel grade	Chemical composition (%)
Steel name	Steel number	C max	Si max	Mn	P max	S max	Al min
E215	1.0212	0.10	0.05	0.70	0.025	0.025	0.025
E235	1.0308	0.17	0.35	1.20	0.025	0.025	-
E355	1.0580	0.22	0.55	1.60	0.025	0.025	-

Mechanical and chemical properties of Mechanical Properties (Mpa):

Steel grade	Cold drawn bright hard state BK	Cold drawn bright hard state BKW	Drawing bright Stress relief annealing BKS	Annealing GBK	Normalizing NBK
Tensile strength Rm N / mm min	Elongation% min	Tensile strength Rm N / mm min	Elongation% min	Tensile strength Rm N / mm min	Yield strength in ReH N / mm min	Elongation% min	Tensile strength Rm N / mm min	Elongation% min	Tensile strength Rm N / mm min	Yield strength in ReH N / mm min	Elongation% min
St35	480	6	420	10	420	315	14	315	25	340-470	235	25
St45	580	5	520	8	520	375	12	390	21	440-570	255	21
St52	640	4	580	7	580	420	10	490	22	490-630	355	22

Steel grade	Minimum values for the delivery condition
Steel name	Steel number	+ C	+ LC	+ SR	+ A	+ N
Rm Mpa	A%	Rm Mpa	A%	Rm Mpa	ReH Mpa	A%	ReH Mpa	A%	Rm Mpa	ReH Mpa	A%
E215	1.0212	430	8	380	12	380	280	16	280		30	290-430	215	30
E235	1.0308	480	6	420	10	420	350	16	315		25	340-480	235	25
E355	1.0580	640	4	580	7	580	450	10	450		22	490-630	355	22