Project Description

Commitment to You

We are committed to integrate steel resources in china and serve the global steel market. We have 15+ years of experience in steel researching, production, managing and sales.

Our ability to purchase materials directly from leading mills will give you the competitive edge. Any Questions Just Call +86-731-89903933

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

Experienced 15+ Years

Our ability to purchase materials directly from leading mills at the best possible price will give you the competitive edge. This coupled with a skilled workforce dedicated to embracing the demands of the markets.

We Can Supply Follows Products with High Quality:

  1. Cold Rolled Steel Tube
  2. Cold Drawn Steel Tube
  3. Hollow Bar
  4. Honed Tube
  5. Plated Tube
  6. Plated Bar
  7. Boiler Tube

All Products According Quality Standard Strictly:

  1. ASTM: ASTM A519, ASTM A513.
  2. JIS:JIS G3441, JIS G3445, JIS G3466, JIS G3459.
  3. DIN: DIN1626, DIN1629, DIN2391, DIN2393, DIN2448, DIN2458.
  4. EN: EN10305.
  5. BS: BS6323.

Wide Range of Pipes to Fit Your Industry:

  1. OD from 5mm to 820mm.
  2. Wall Thickness from 0.1 to 100mm.
  3. Length up to 50mtr per pc.

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