DIN 2391 Pipe Din 2391 St35 St45 St52 Seamless Precision Steel Tubes

DIN 2391 applies to seamless precision steel tubes and in compliance with ISO/DIN 3304, those tube dimensions have been selected from the range of manufacture dimensions which are mainly used as design elements.

If tubes having the tolerances and are produced according to the technical conditions of deivery as specified in this Standard are to e used as pipelines, then the dimensions specified in DIN 2448 may from time to time be used. These tubes must be ordered according to quality grade C.

DIN 2391 Pipe Seamless Precision Steel Tubes Size:
Outside Diameter (Nominal Size ): 4 - 260 mm
Wall Thickness: 0,5 - 25 mm
Delivery condition:BK ,BKW,BKS,GBK,NBK
Application: Industrial and Mechanical, Automotive

Notes:

Steel grades: St 35, St 45, St 52
Length up to 9 m.
Test certificates according to DIN EN 10204.

DIN 2391 Seamless Precision Steel Tubes Sizes
Nominal Size, mm	Wall Thickness, mm
6; 7	0,5; 0,8; 1,0; 1,2; 1,5; 1,8; 2,0
8	0,5; 0,8; 1,0; 1,2; 1,5; 1,8; 2,0; 2,2; 2,5
9	0,5; 0,8; 1,0; 1,2; 1,5; 1,8; 2,0; 2,2; 2,5; 2,8
10; 12	0,5; 0,8; 1,0; 1,2; 1,5; 1,8; 2,0; 2,2; 2,5; 2,8; 3,0
14; 15; 16; 18	0,5; 0,8; 1,0; 1,2; 1,5; 1,8; 2,0; 2,2; 2,5; 2,8; 3,0; 3,5
20; 22	0,5; 0,8; 1,0; 1,2; 1,5; 1,8; 2,0; 2,2; 2,5; 2,8; 3,0; 3,5
25; 26; 28; 30	1,0; 1,2; 1,5; 1,8; 2,0; 2,2; 2,5; 2,8; 3,0; 3,5; 4,0; 4,5; 5,0; 5,5; 6,0
32; 35; 38; 40	1,0; 1,2; 1,5; 1,8; 2,0; 2,2; 2,5; 2,8; 3,0; 3,5; 4,0; 4,5; 5,0; 5,5; 6,0
42; 45; 48; 50	1,0; 1,2; 1,5; 1,8; 2,0; 2,2; 2,5; 2,8; 3,0; 3,5; 4,0; 4,5; 5,0; 5,5; 6,0
55; 60; 65	1,5; 1,8; 2,0; 2,2; 2,5; 2,8; 3,0; 3,5; 4,0; 4,5; 5,0; 5,5; 6,0
70; 75; 80	3,0; 3,5; 4,0; 4,5; 5,0; 5,5; 6,0

DIN 2391 Seamless Precision Steel Tubes Mechanical Properties (Mpa)

Grade	Material Number	Tensile Strength MPa or N/mm2		Remaks (Similar to JIS)	Possibility Temperature
Grade	Material Number	Min Yield Point	Tensile Strength	Remaks (Similar to JIS)	Possibility Temperature
St30Si	1.0211	-	400Min	(STKM11)
		-	355Min
		-	285Min
		215	295~420
St30Al	1.0212	-	400Min	(STKM11)
		-	355Min
		-	285Min
		215	295~420
St35	1.0308	-	440Min	(STC38)
		-	370Min
		-	315Min
		235	340~470
St45	1.0408	-	540Min	(STKM13)
		-	470Min
		-	390Min
		255	440~570
St52	1.0580	-	590Min	(STKM19)
		-	540Min
		-	490Min
		350	490~630

DIN 2391 Seamless Precision Steel Tubes Chemical composition(%)

Grade	Mfg. Process	Chemical composition(%)
		C	Si	Mn	P	S	Ni	Cr	Mo	Others	a
											b
											c
											d
St30Si	S	0.10Max	0.30Max	0.55Max	0.040Max	0.040Max	-	-	-	-	a
											b
											c
											d
St30A1	S	0.10Max	0.05Max	0.55Max	0.040Max	0.040Max	-	-	-	Al deoxydized	a
											b
											c
											d
St35	S	0.17Max	0.35Max	0.40Max	0.050Max	0.050Max	-	-	-	-	a
											b
											c
											d
St45	S	0.21Max	0.35Max	0.40Max	0.050Max	0.050Max	-	-	-	-	a
											b
											c
											d
St52	S	0.22Max	0.55Max	1.60Max	0.050Max	0.050Max	-	-	-	-	a
											b
											c
											d

Note: a: Cold-finished/hard b: Cold-finished/soft c: Annealed d: Normalized

Delivery status	Abbreviation	Description
Cold-finished/hard (Cold-finished as-drawn)	BK	No heat treatment after the last cold-forming process. The tubes therefore have only low deformability.
Cold-finished/soft (lightly cold-worked)	BKW	After the last heat treatment there is a light finishing pass (cold drawing) With proper subsequent processing, the tube can be cold-formed (e.g. bent, expanded) within certain limits.
Annealed	GBK	After the final cold-forming process the tubes are annealed in a controlled atmosphere or under vacuum.
Normalized	NBK	The tubes are annealed above the upper transformation point in a controlled atmosphere or under vacuum.

Welded Steel Tubing and pipe-Corresponding to DIN 2391-1

Wall thickness s	Nominal dimension	0.5	0.8	1	1.2	1.5	1.8	2	2.2	2.5	2.8	3	4.5	5	5.5	6	7	8	9	10	12	14	16	18	20	22	25
Wall thickness s	Permissible deviation
Outside diameter da
Nominal dimension	Permissible deviation
4	+/-0.1
5
6
7
8
9
10
12	【0.08
14
15
16
18
20
22
25
26
28
30
32	【0.15
35
38
40
42	0.20
45
48
50
55	【0.25
60	【0.25
65	【0.30
70	【0.30
75	0.35
80	0.35
85	0.40
90	0.40
95	【0.45
100	【0.45
110	0.50
120	0.50
130	0.70
140	0.70
150	0.80
160	0.80
170	0.90
180	0.90
190	1.0
200	1.0
220	1.20
240	1.20
260	1.30
1) For outside diameters of nominal dimensions 4 and 5 mm, the permissible deviation from the nominal dimension s of the wall thickness is 20 % For outside diameters of nominal dimensions 6 to 8 mm, the permissible deviation from the nominal dimension s of the wall thickness is 15%.													s/D =1/60			s/D =1/40					s/D =1/20

Standard No	Steel Grade	Standard Name	Dimension Range
EN 10208	L210GA,L235GA,L245GA,L290GA, L360GA,L245NB, L290NB,L360NB, L415NB, L360QB, LI15QB,L450QB, L485QB,L555QB	Steel Pipes for Pipelines for Combustible Fluids	33.7-1626mm
EN 10210	S235JRH,S275JOH,S275J2H,S355JOH, S355J2H,S355K2H,S275NH,S275NLH, S355NH,S355NLH,S420NH,S420NLH, S46INH,S460NLH	Hot Finished Structural Hollow Sections of Non-alloy and Fine Grain Steels	21.3-1219mm
EN 10216-1	P195TRI,P195TR2,P235TR1, P235TR2, P265TR I, P265TR2	Seamless Steel Tubes for Pressure Purposes-1- Non-alloy Steel Tubes with Specified Room Temperature Properties	10.2-711mm
EN 10216-2	P195GH, P235GH, P265GH, 20MnNb6,16Mo3, 8MoB5-4, 14MoV6.3, 10CrMo5.5,13CrMo4-5, 10CrMo9-10, 11CrMo9.10, 25CrMo4,20CrMoV13-5-5, 15 NiCuMoNB-6-4,X11CrMo5+1, X11CrMo5+NTI,X11CrMo5+NT2, X11CrMo9.1+1, X11CrMo9.1+NT, X10CrMoVNb9-l, X20CrNiV11-1	Seamless Steel Tubes for Pressure Purposes-2: Non-alloy and Alloy Steel Tubes with Specified Elevated Temperature Properties	10.2-711mm
EN 10216-3	P275NL I,P275NL2, P355N,P355NH, P355NL1,P355NL2,P460N,P460NH, P460NL1,P460NL2,P620Q,P620QH,P620QL, P690Q,P690QH,P690OL1,P690QL2	Seamless Steel Tubes for Pressure Purposes-3: Alloy Fine Grant Steel Tubes	10.2-711mm
EN10216-4	P215NL,P255QL,P265NL, 26CrMo4.2,11MnNi5-3,13MnNi6-3, 12Nil4,Xl2Ni5,X10Ni9	Seamless Steel Tubes far Pressure Purposes-4: Non-alloy aid Alloy Steel Tubes with Specified Low Temperature Properties	10.2-711mm
EN 10224	L235, L275, L355	Non-alloy Steel Tubes and Fittings for the Conveyance of Water and Other Aqueous Liquids	26.9-2743mm
EN 10297-1	E235,E275,E315,E355,E470, E275K2,E355K2,E420J2,E460K2, E590K2,F730K2 C22E,C35E,C45E,C60E, 38Mn6,41Cr4,25CrMo4,30CrMo4, 34CrMo4,42CrMo4,36CrNiMo4, 30CrNiMo8,4lNiCrMo7-3-2	Seamless Circular Steel Tubes for Mechanical mid General Engineering Purposes-1: Non-alloy and Alloy Steel Tubes	26.9-610mm
EN 10305-1	E215,E235,E355	Steel Tubes For Precision Applications-1: Seamless Cold Drawn Tubes	4-260mm
EN 10305-4	E215,E235,E355	Steel Tubes for precision Applications-4: Seamless Cold Drawn Tubes for Hydraulic mid Pneumatic Power Systems	4-80mm

HEAT-TREATABLE STEELS Seamless steel tubes acc. to DIN EN 10083-3 and DIN 17204

	DIN EN 10083-3:	Heat-treatable steels (Quenched & tempered steels)
	Steel grades:	e.g. 25CrMo4, 34CrMo4, 42CrMo4
	DIN 2448/17204:	Seamless circular tubes made from heat-treatable steels
	(DIN 2448 [replaced]):	Plain end seamless steel tubes: Dimensions and conventional masses per unit length
	Steel grades:	e.g. 25 CrMo 4, 34 CrMo 4, 42 CrMo 4
	Fields of application:
	General mechanical engineering and tool-building, vehicle construction, pressure vessel and pipeline construction

TUBES FOR STRUCTURAL STEEL CONSTRUCTIONS MADE FROM FINE-GRAIN STEELS Seamless steel tubes acc. to DIN EN 10210 and DIN 17124

	DIN EN 10210-1:	Hot-finished structural hollow sections of non-alloy and fine-grain structural steels
	Steel grades:	e.g. S275NH, S355NH, S355NLH, S460NH, S460NLH
	DIN EN 10210-2:	Hot-finished structural hollow sections of non-alloy and fine-grain structural steels - Tolerances, dimensions and sectional properties
	DIN 2448/17124 (replaced):	Seamless circular tubes of fine-grain steels for engineering purposes
	(DIN 2448 [replaced]):	Plain end seamless steel tubes: Dimensions and conventional masses per unit length
	Steel grades:	e.g. StE 285, StE 355, TStE 355, StE 460, TStE 460
	Fields of application:
	Steel construction ( e.g. structural and civil engineering ), bridge and crane construction

PIPELINES FOR GAS AND COMBUSTIBLE FLUIDS Seamless steel tubes acc. to DIN EN 10208-2 and DIN 17172

	DIN EN 10216-2:	Steel pipes for pipelines for combustible fluids Tubes from requirement class B
	Steel grades:	e.g. L290NB, L360NB, L415NB, L415QB
	DIN 2448/17171 (replaced):	Steel pipes for pipelines for the transport of combustible fluids and gases
	(DIN 2448 [replaced]):	Plain end seamless steel tubes: Dimensions and conventional masses per unit length
	Steel grades:	e.g. StE 290.7, StE 360.7, StE 415.7
	Fields of application:
	Long-distance pipelines (e.g. oil and oil products) for compressed and liquid gases

SEAMLESS TUBES FOR PRESSURE PURPOSES AT ROOM TEMPERATURE Seamless steel tubes acc. to DIN EN 10216-3 and DIN 17179

	DIN EN 10216-3:	Seamless steel tubes for pressure purposes of alloy fine- grain steels with specified properties at room temperature
	Steel grades:	e.g. P355N, P355NH, P355NL1, P355NL2
	DIN 2448/17179 (replaced):	Seamless circular tubes of fine-grain steels for special requirements
	(DIN 2448 [replaced]):	Plain end seamless steel tubes: Dimensions and conventional masses per unit length
	Steel grades:	e.g. StE 355, WStE 355, TStE 355, EStE 355
	Fields of application:
	Pressure vessel construction, apparatus engineering, pipelines, mechanical engineering and tool-building.

SEAMLESS TUBES FOR PRESSURE PURPOSES AT LOW TEMPERATURES Seamless steel tubes acc. to DIN EN 10216-4 and DIN 17173

	DIN EN 10216-4:	Seamless steel tubes for pressure purposes of non-alloy and alloy steels with specified low-temperature properties.
	DIN 2448/17173 (replaced):	Seamless circular tubes of cold-resistant steels
	(DIN 2448 [replaced]):	Plain end seamless steel tubes: Dimensions and conventional masses per unit length
	Fields of application:
	Apparatus engineering, vessel construction, pipelines, mechanical engineering and tool-building.

Useful Tools:

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Stainless Steel Tubing Pipe

304 Stainless Steel Pipe
304L Stainless Steel Pipe
304H Stainless Steel Pipe
304/304L Stainless Steel Tubing
309S Stainless Steel Pipe
310S Stainless Steel Pipe
316L Stainless Steel Tubing
316Ti Stainless Steel Tube
317L Stainless Steel Pipe
321 321H Stainless Steel
347 347H Stainless Steel
904L N08094 Seamless Tubes
17-4 PH 630 UNS S17400 Stainless Steel
253MA S30815 Stainless Steel Tube
S31254 254 SMO Pipe
S31803 Stainless Steel
2205 Duplex Pipe Tubing
S32101 Stainless Steel
S32304 Stainless Steel
2507 Super Duplex Pipe
S32750 Super Duplex Pipe
S32760 Super Duplex Steel
1.4462 Stainless Steel Pipe
ASTM A213 | ASTM A269
ASTM A312 | ASTM A511
ASTM A789 | ASTM A790
ASTM B161 / ASME SB 161 | ASTM B111
EN 10216-5
ASTM A789 ASME SA 789 S31803 S32205 S32101 S32750 S32760 S32304 S31500 S31260 Seamless Tubes
EN 10216-5 1.4462 1.4362 1.4162 1.4410 1.4501 Seamless Tubes

Nickel Alloy Tubing:

UNS N08020 Alloy 20 Tubing
UNS N02200 Alloy 200 Tube
UNS N02201 Alloy 201 Pipe
UNS N04400 Monel 400 Tubing
N06600 Inconel 600 Tube
N06601 Inconel 601 Tubing
N06625 Inconel 625 Tubes
N08800 Incoloy 800 Tube
N08810 Incoloy 800H Tube
N08811 Incoloy 800HT Tubing
UNS N08825 Incoloy 825 Pipe
ASTM B622 N10276 C276 Tubing
ASTM B622 N06022 Hastelloy C-22 Alloy Tubes
C28000 Brass Seamless Tubes C44300 Brass Seamless Tubes
C68700 Brass Seamless Tubes
C70600 Copper Nickel Tubes
C71500 Copper Nickel Tubes
DIN 2391 Seamless Precision Steel Tubes
EN 10305-1 E215 E235 E355 Seamless Precision Steel Tube Tubing Tubes
DIN 2393 St28 St34.2 St37.2 St44.2 St52.3 Welded Precision Steel Tubes
EN 10305-2 E195 E235 E355 Welded Cold Drawn Precision Steel Tube