DIN 2391-1 Seamless Precision Steel Tubes supplier

 

Besides exhibiting high precision, these products tend to have a good surface quality and great straightness as well. There are several specifications that cover high precision tubes including – din 17175, EN 10305-1 and din 2391. Another fitting advantage of using the specification is that the inner diameter of various steel grade Precision Seamless Tubes could be constructed into a hexagon shaped one.

 

Furthermore, the performance of these steel High precision Tubes tends to be superior, with the metal becoming relatively dense. Compared with solid steel pipes, including a steel round furnished seamless steel pipe, the precision seamless steel tubes are light in weight, even if both the varieties of pipes have the same bending and torsional strength. Amongst numerous steel sections, they gravitate towards the economical side.  Therefore, the din 2391 seamless precision steel tubes widely adopted in the assembling of anatomical parts as well as mechanical parts. In addition, the manufacturing of EN 10305-1 Precision cold drawn steel tube can enhance material utilization, conserve materials and processing man-hours & simplify manufacturing processes, as well. Generally, precision seamless pipes such as din 17175 Cold Rolled Steel Tube are accepted in industries with high precision requirements, as opposed to their regular seamless counterparts, which are mostly applied without precision specifications. However, the expense of a precision seamless pipe of an identical specification tends to be much more high-priced in comparison to that of regular seamless pipes.

 

fushun is one of the large suppliers for high quality DIN 2391 Material. Carbon Steel DIN 2391 Tubing has various outstanding attributes to provide like having sturdiness, dimensional accuracy, toughness. DIN 2391 EN 10305 1 standard specifies the Seamless steel tubes used for Automobile and Mechanical.

 

Machinery use

Auto shock reducer inner cylinder

Oil cylinder tube

Motorcycle shock reducer steel tubes

 

Marking:

Weight of bundle – upto 5000 kg upon request of client’s.

Pipes are supplied in round bundles or hexagonal bundles tied with steel strip.

Each bundle is furnished with three tags.

 

–Precise custom outer diameter and inner diameter
–Tight tolerances, resulting in reduced machine time / Dimensional accuracy
–Smooth and Clean OD and ID surfaces
–Excellent machining characteristics
–Wider range of physical properties attainable through process and annealing options

 

Chemical Composition:

 

Steel grade		Chemical composition, as a percentage by mass
Symbol	Material number	C max.	Si max.	Mn	P max.	S max.
St 30 Si	1.0211	0.10	0.30	<=0.55	0.025	0.025
St 30 Al	1.0212	0.10	0.05	<=0.55	0.025	0.025
St 35	1.0308	0.17	0.35	<=0.40	0.025	0.025
St 45	1.0408	0.21	0.35	<=0.40	0.025	0.025
St 52	1.0580	0.22	0.55	<=1.60	0.025	0.025
The following alloying elements may be added: Nb: <=0,03%; Ti: <=0,03%; V: <=0,05%; Nb + Ti + V: <=0,05%.

 

Final supply conditions:

Designation	Symbol	Description
Cold finished (hard)	BK	Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation.
Cold finished (soft)	BKW	The final heat treatment is followed by cold drawing involving limited deformation. Appropriate further processing allows a certain degree of cold forming (e.g. bending, expanding).
Cold finished and stress-relieved	BKS	Heat treatment is applied following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree.
Annealed	GBK	The last cold forming process is followed by annealing in a controlled atmosphere.
Normalized	NBK	The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere.

 

Condition on delivery:

Steel Grade	BK		BKW		GBK		NBK
Code No.	Tensile Strength N/mm2 min	Elongation at rupture N/mm2 min	Tensile Strength N/mm2 min	Elongation at rupture N/mm2 min	Tensile Strength N/mm2 min	Elongation at rupture N/mm2 min	Tensile Strength N/mm2 min	Elongation at rupture N/mm2 min
St30 Si	400	8	330	12	280	30	290-420	30
St30 Al	400	8	330	12	280	30	290-420	30
St 35	440	6	370	10	315	25	340-470	25
St 45	540	5	470	8	390	21	440-570	21
St 52	590	4	540	7	490	22	490-630	22

 

Competitive Advantage:

Manufacturer with more than 250,000Tons/Year, >60% shipped to more than 35 Countries.We aims at manufacturing quality pipes & tubes with reasonable and competitive price, good quality for our global customers.

 

Product Description /Specifications

Production Range	Outer Diameter：10-120mm (0.4 inch – 4.7 inch)
	Wall Thickness：1-20mm (0.04 inch – 0.78 inch)
Material / Grade	Carbon Steel： GB/T 8162 & 8163 & 3639: 10#, 20#, 35#, 45#, 55#, Q235B, Q235C, CF53, A105 ASTM A519: 1010, 1020, 1026, 1035, 1045, 1050 DIN17121/EN 10297-1, DIN1629/DIN2391/EN 10305-1: C10/CK10, C22/CK22, C35/CK35, C45/CK45, CF53 JIS3441/JIS3444/JIS3445: STKM11A, STKM12A/STKM12B/STKM12C, STKM13A/STKM13B/STKM13C JIS G4051: S10C, S20C, S25C, S35C, S45C, S55C
	Alloy Steel： GB/T 8162 & 8163 & 3639: 16Mn(Q345B), 20Cr, 40Cr, 15CrMo, 20CrMo, 28CrMo, 30CrMo, 35CrMo, 42CrMo, 20CrMnTi, 40MnMoV, 20Mn2, ZF6, 16MnCr5, 20MnCr5, 38Mn2V, 09CrCuSb(ND) ASTM A519: 5120, 5140, 4130, 4135, 4140 DIN17121/EN 10297-1, DIN1629/DIN2391/EN 10305-1: ST52, EN10084-1998 20Cr4, 41Cr4, 15CrMo4, 25CrMo4, 35CrMo4, 42CrMo4, 16MnCr5 JIS3441/JIS3444/JIS3445: SCM432/SCRRM3, SCM4 JIS G4053: JIS SCr420, JIS SCr440, SCM415, SCM420
Tolerance	Tolerance ±0.15mm，Superior products ±0.05mm, Can be customized according to customer’s requirements
Technique	Cold Drawn / Cold Rolled
Shape	Round
Further Processing for Steel Tubes	Final Annealing, Cutting, Chamfer, Threading, Inner diameter or Outer Diameter Lathe, Surface Shot Blasting, Laser Marking

 

Cold Drawn VS Cold Rolled Technology

Cold Drawing

1. Through special alloy steel mould cold drawn forming
2. Small deformation
3. Inside and outside surface bright and clean
4. Hardness moderate
5. Suitable for machining
6. Special shape tube necessary procedure

Cold Rolling

1. Through the roller repeatedly rolling the outer surface forming
2. Large deformation
3. Outer surface bright with a mirror effect
4. High hardness
5. Suitable for terminal products
6. High surface requirement tube necessary procedure

Combination of Cold Drawing and Cold Rolling

1. High-end products adopt the combination mode of cold drawn and cold rolled.
2. Suitable for subsequent machining
3. Perfect surface

Examples: rifle barrel, shock absorber

International Steel Grade Table

 

International Steel Grade Table
	China	ASTM A519	DIN	JIS 3445	JIS G4051
Carbon Steel	10#	1010	DIN C10/CK10	STKM11A	S10C
	20#	1020	DIN C22/CK22	STKM12A/STKM12B/      STKM12C	S20C
	25#	1026		STKM13A/STKM13B/ STKM13C	S25C
	35#	1035	DIN C35/CK35		S35C
	45#	1045	DIN C45/CK45		S45C
	55#				S55C
	CF53	1050	CF53
	Q235B
	Q235C
	A105
Alloy Steel	16Mn(Q345B）		St52
	20Cr	5120	20Cr4 (EN 10084-1998)	JIS SCr420( JIS G4053)
	40Cr	5140	41Cr4(1.7035)	JIS SCr440( JIS G4053)
	15CrMo		15CrMo4	SCM415 (JIS 4053)
	20CrMo		25CrMo4(1.7218)	SCM420 (JIS 4053)
	28CrMo
	30CrMo	4130
	35CrMo	4135	35CrMo4(1.7220)	SCM432/SCRRM3
	42CrMo	4140	42CrMo4(1.7225)	SCM4
	20CrMnTi
	40MnMoV
	20Mn2
	ZF6		16MnCr5(1.7131)
	16MnCr5
	20MnCr5
	38Mn2V
	36Mn2V
	09CrCuSb(ND钢)
Steel Tube Standard	Seamless Steel Tubes for Structural Purposes GB/T 8162-2018	ASTM A519	DIN17121/EN 10297-1	JIS3441/JIS3444/JIS3445
	Seamless Steel Pipes for Liquid Service   GB/T 8163-2018	ASTM A106
	Seamless Cold-drawn or Cold-rolled Steel Tubes for Precision Applications GB/T 3639-2009		DIN1629/DIN2391           / EN 10305-1
	Cold Drawn Shaped Steel Tubes GB/T 3094-2012	ASTM A500 / ASME SA500
	Seamless Steel Tubes for Automobile Stabilizer Bar GB/T 33821-2017
Rebar Coupler Standard	Couplers for Rebar Mechanical Splicing JG/T 163-2013

 

DIN 2391-1 Cold Drawn Tube Specification

Standards	DIN 2391-1 Cold Drawn Tube
DIN 2391-1 Cold Drawn Seamless Pipe Size	4 to 219mm W. T.: 0.5 to 20mm
DIN 2391-1 Cold Drawn Welded Pipe Size	5.0 mm – 1219.2 mm
DIN 2391-1 Cold Drawn EFW Pipe size	5.0 mm – 1219.2 mm
DIN 2391-1 Cold Drawn Tube Swg & Bwg	10 Swg., 12 Swg., 14 Swg., 16 Swg., 18 Swg., 20 Swg.
DIN 2391-1 Cold Drawn Pipe Schedule	SCH5, SCH10, SCH10S, SCH20, SCH30, SCH40, SCH40S, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
DIN 2391-1 Cold Drawn Seamless Tube Size	3.35 mm OD To 101.6 mm OD
DIN 2391-1 Cold Drawn Welded Tube Size	6.35 mm OD To 152 mm OD
Swg & Bwg	10 Swg., 12 Swg., 14 Swg., 16 Swg., 18 Swg., 20 Swg.
DIN 2391-1 Cold Drawn Tube wall thickness	0.020″ –0.220″, (special wall thicknesses available)
Length	Single Random, Double Random, Standard & Cut length Pipe & Tube
Finish	Polished, AP (Annealed & Pickled), BA (Bright & Annealed), MF
Form	Round, Hydraulic, ‘U’ bent or Hollow,LSAW, Boiler, Straight Pipe, Clad Pipe, Rectangular, Square Pipe Etc
Type	Welded, Seamless, ERW, EFW, Fabricated Pipe, ‘U’ bent or Hollow, Hydraulic, LSAW, Boiler, Straight Tube, Tube Coil, Round, Rectangular, Square Tube etc
End	Plain End, Beveled End, Treaded Pipe & Tube
Marking	All DIN 2391-1 Cold Drawn Tube are marked as follows: Standard, Grade, OD, Thickness, Length, Heat No. (Or according to the customer’s request.)
Application	Oil Pipe & Tube, Gas Pipe & Tube, Fluid Pipe & Tube, Boiler Pipe & Tube, Heat exchanger Tube
Value Added Service	Draw & Expansion as per required Size & Length, Polish (Electro & Commercial) Annealed & Pickled Bending, Machining Etc.
Test Certificate	Manufacturer Test Certificate Laboratory Test Certificate from Govt. Approved Lab. Under Third Party Inspection
We can also cut, thread, and groove DIN 2391-1 Cold Drawn Tube to meet your specifications.

 

DIN 2391-1 Chemical Composition

Grade	Chemical Composition(%):
	C max	Si max	Mn	P max	S max
DIN 2391 St 35	0.17	0.35	≥0.40	0.025	0.025
DIN 2391 St 45	0.21	0.35	≥0.40	0.025	0.025
DIN 2391 St 52	0.22	0.55	≤1.60	0.025	0.025

 

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	–

 

DIN 2391 ST35 Mechanical Properties

Grade	BK		BKW		BKS			GBK		NBK
	RmN/mm min	min	RmN/mm min	min	N/mm min	ReH N/mm min	min	N/mm min	min	N/mm min	ReH N/mm min	min
DIN 2391 St35	480	6	420	10	420	315	14	315	25	340-470	235	25
DIN 2391 St45	580	5	520	8	520	375	12	390	21	440-570	235	21
DIN 2391 St52	640	4	580	7	580	420	10	490	22	490-630	355	22

 

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

Other Types of DIN 2391 Carbon Steel Tubes

Carbon Steel DIN 2391 ST35 Tubes Carbon Steel DIN 2391 ST45 Tubes DIN 2391 ST52 Tubes DIN 2391 ST35 High Precision Seamless Tubes DIN 2391 ST45 Seamless Tubes DIN 2391 Thick Wall High Precision Steel Tube DIN 2391 ST52 Cold Drawn Carbon Seamless Steel Tubes

High Quality DIN 2391 ST45 Tubes DIN 2391 ST52 Steel Tubes DIN 2391 Thin Wall Carbon Seamless Precision Steel Tubes DIN 2391 ST35 Cold Drawn Carbon Steel Tubes DIN 2391 ST45 Precision Seamless Steel Tubes DIN 2391 EN 10305 Tubes DIN 2391 ST35 Steel Tubes

We offer wide range of Tube DIN 2391, DIN 2391-1 Cold Rolled Steel Tubes at factory price.

Fushun provide you with robust quality of DIN 2391-1 Cold Drawn Tube & DIN 2391-1 Cold Drawn Steel Tube in a wide range