DIN 2391 St45 Seamless Precision Steel Tubes, DIN2391-2 St45, EN 10305-1 E235, EN 10305-4, NF 699, Precision Steel Tube, HPL Tube, power steering, cold drawn seamless steel tubing, DIN-2391 sheet 2 steel grade st45 cond. nbk, AMG-69107, IU 920004, steel tube for safety system, steel tube for shock absorber, steel tube for steering system, precision steel tubes for automotive, mounting ring, container cylinder, inner cylinder, hollow piston rod, steering cylinder, inflator tube, camshafts, end forming set frames, IP beams, Engine Cradles, Anti-roll bars, seat back frames, Rear arms, Torsion beams, Stabiliser bars, Door beams, A-Pillars, Carbon Steel Pipes, Precision Steel Tubes, CNG Tubes, DIN 2391 St35, DIN 2391 St45, DIN 2391 St52, EN 10305-1, EN 10305-4, ASTM A519, NF 699, GOST 9567-75, NBR 8476, BS 6323 Part 4, NF A 49-330-85, BS 6323-4, NF A 49-310, UNI 6403, St44, St45.8, 1020, 20, P265TR1, E255, S255GT

DIN 2391 Seamless precision steel tubes

Standard: DIN 2391
Equivalent Standard: EN 10305-1, EN 10305-4, ASTM A519, NF 699, GOST 9567-75, NBR 8476, BS 6323 Part 4, NF A 49-330-85, BS 6323-4, NF A 49-310, UNI 6403

Material: St45, 1.0408
Equivalent Materials: St44, St45.8, 1020, 20, P265TR1, E255, S255GT

Chemistry Composition

C, %	Si, %	Mn, %	P, %	S, %
0.21 max	0.35 max	0.40 min	0.025 max	0.025 max

Mechanical Properties

Tensile Strength , MPa	Yield Strength, MPa	Elongation, %	Delivery Condition
580 min	-	5 min	BK
520 min	-	8 min	BKW
520 min	375 min	12 min	BKS
390 min	-	21 min	GBK
440-570	255 min	21 min	NBK

DIN 2391 standard specifies technical delivery conditions for cold finished seamless precision steel tubes of the dimensions listed in DIN 2391 Part 1, which are made from the steel grades of St30Si (1.0211), St30Al (1.0212), St35 (1.0308), St45 (1.0408), St52 (1.0580). Such tubes are mainly used where accuracy to size and, possibly, a small wall thickness, a particular surface condition and specific mechanical properties are required.

Manufacture: tubes to DIN 2391 shall be manufactured by cold rolled or cold drawn, hot rolled.
Delivery Condition: Cold finished (hard) as BK, cold finished (soft) as BKW, cold finished and stress-relieved as BKS, annealed as GBK, normalized as NBK.
Inspection & Test: chemistry composition analysis, tensile test, flattening test, flaring test, NDT, surface inspection and dimension check.

Length: 5800mm; 6000mm; 10000mm; 11800mm; and so on.
Further process: cutting, deformation.

Keyword: precision steel tube, DIN 2391, DIN 2391-2, DIN 2391 Part II, precision steel pipe, cng tube, HPL Tube

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