logo
Welcome to NEW-ERA STEEL TUBE TECHNOLOGY CO.,LTD
Home / Products / Seamless Cold Drawn Steel Tube / DIN2391 Smooth Surface Seamless Steel Tube
Quality DIN2391 Smooth Surface Seamless Steel Tube factory
Quality DIN2391 Smooth Surface Seamless Steel Tube factory
Quality DIN2391 Smooth Surface Seamless Steel Tube factory
Quality DIN2391 Smooth Surface Seamless Steel Tube factory
Quality DIN2391 Smooth Surface Seamless Steel Tube factory
Quality DIN2391 Smooth Surface Seamless Steel Tube factory

DIN2391 Smooth Surface Seamless Steel Tube

Basic Properties
Place of Origin: China
Brand Name: Pipeway steel
Certification: ISO9001
Model Number: Cold drawn steel tube
Trading Properties
Minimum Order Quantity: 1 tons
Payment Terms: T/T
Supply Ability: 3000 tons per month
Tags

cold drawn welded tubes

erw welded pipe

seamless black steel pipe
Product Summary
DIN 2391 is a German standard that specifies the technical delivery conditions for seamless, cold-drawn precision steel tubes. These tubes are renowned for their exceptional dimensional accuracy, excellent surface finish, and enhanced mechanical properties achieved through the cold drawing process. ...

Product Details

Highlight:

DIN2391 seamless steel tube

,

cold drawn steel tubing

,

smooth surface steel pipe
Outer Diameter: 6-168mm
Packing: Bundles Packing, Wooden Box
Surface Treatment: Bright Annealing, Clean, Black
Wall Thickness: 1-30mm
Application: High Precision Usage
Shape: Round
Certificate: ISO9001
Process: Cold Drawn
Product Description

DIN 2391 is a German standard that specifies the technical delivery conditions for seamless, cold-drawn precision steel tubes. These tubes are renowned for their exceptional dimensional accuracy, excellent surface finish, and enhanced mechanical properties achieved through the cold drawing process.

They are primarily used for mechanical and automotive engineering purposes where high precision, good strength, and reliability are required. Common applications include:

  • Hydraulic and pneumatic cylinders

  • Precision machined parts and bearings

  • Automotive components (e.g., shock absorbers, steering columns)

  • General mechanical engineering and structural applications

Chemical composition:

 
 
Element / Grade St 35 St 45 St 52 C 35 C 45
Carbon (C) 0.17 % 0.21 % 0.22 % 0.32 - 0.39 % 0.42 - 0.50 %
Manganese (Mn) 0.35 - 0.65 % 0.40 - 0.70 % 1.00 - 1.60 % 0.50 - 0.80 % 0.50 - 0.80 %
Phosphorus (P) 0.045 % 0.045 % 0.045 % 0.045 % 0.045 %
Sulfur (S) 0.045 % 0.045 % 0.045 % 0.045 % 0.045 %
Silicon (Si) - - - 0.15 - 0.35 % 0.15 - 0.35 %

 

Mechanical properties:

 
 
Grade Tensile Strength (Rₘ) Yield Strength (Rₑ) min. Elongation at Break (A) min. %
St 35 420 - 570 MPa 350 MPa 6 %
St 45 490 - 640 MPa 400 MPa 6 %
St 52 580 - 740 MPa 420 MPa 6 %
C 35 510 - 650 MPa 390 MPa 6 %
C 45 580 - 730 MPa 430 MPa 6 %

3.2 Properties in the Normalized Condition (+N)

Tubes can be supplied normalized to relieve stresses from cold working, which improves machinability and dimensional stability.

 
 
Grade Tensile Strength (Rₘ) Yield Strength (Rₑ) min. Elongation at Break (A) min. %
St 35 340 - 470 MPa 235 MPa 25 %
St 45 390 - 530 MPa 255 MPa 22 %
St 52 490 - 630 MPa 355 MPa 22 %
C 35 490 - 630 MPa 285 MPa 20 %
C 45 580 - 730 MPa 325 MPa 14 %

Key Advantages of DIN 2391 Tubes:

  • High Precision: Extremely tight tolerances on outer diameter and wall thickness.

  • Superior Surface Quality: Smooth, scale-free surface ideal for plating, painting, or use as-is.

  • Enhanced Strength: The cold drawing process increases yield and tensile strength.

  • Excellent Machinability: Particularly in the normalized condition, they are well-suited for machining.

  • Standardized Quality: Guaranteed properties ensure consistency and reliability for critical applications

Support and Services:

Our Product Technical Support and Services for Seamless Cold Drawn Steel Tubes aim to provide comprehensive assistance to our customers. Our team of experts is dedicated to helping you with any technical inquiries, product specifications, or troubleshooting needs you may have.

We offer a range of services, including:

  • Product specifications and technical data
  • Customization options
  • Quality assurance and testing
  • Installation guidance
  • Troubleshooting and support

Our goal is to ensure that you have a seamless experience with our Seamless Cold Drawn Steel Tubes, from initial inquiry to post-purchase support. Please do not hesitate to reach out to our technical support team for any assistance you may require.

 

Packing and Shipping:

Product Packaging:
Each seamless cold drawn steel tube is carefully wrapped in protective material to prevent scratches and damage during transportation. The tubes are then placed in sturdy cardboard boxes with ample cushioning to ensure safe delivery.

Shipping:
We offer reliable shipping services to ensure that your seamless cold drawn steel tubes reach you in a timely manner. Our shipping partners are experienced in handling delicate materials and will deliver your order safely to your specified location.

Mr. Denny

Managing Director

Related Products
  • Quality DIN2391 Precision Seamless Steel Tube factory

    DIN2391 Precision Seamless Steel Tube
    Product Name: DIN2391 Cold Drawn Precision Seamless Steel Tube Material: ST35, ST45, ST52 Size Range: OD: 6-88mm, WT: 1-15mm, Length: 5.8m/6m, maximal 11.8m Delivery Condition: BK, BKW, BKS, GBK, NBK Application: For high precision purpose, auto industry, like manipulator, Shock Absorber, Transmission Shaft, Steering Gear, Car Frame, etc. Stable Quality with Comeptitive Price. NBK(Bright Annealing) Heat Treatment, Surface is clean and smooth, without oxide scale Good
  • Quality SAE4130 Honed Hydraulic Cylinder Seamless Steel Tube factory

    SAE4130 Honed Hydraulic Cylinder Seamless Steel Tube
    Product Name: SAE4130 ASTM A519 CW / SR Seamless Mechanical Tubing Honing Round Steel Tubing Size Range: OD: 40-500mm, WT: 1-30mm, Length: 5.8m/6m, maximal 11.8m Product Name ASTM A519 CW / SR Seamless Cold Drawn Honing Steel Tubing Material St35, St45, St52, E355, E255, 1020, 1045, 4130 Delivery Condition CW, SR Standard DIN2391 / EN10305-1 / ASTM A519 / GB3639 Size Range OD: 40-500mm, WT: 1-30mm Application High precision purpose, auto parts, oil cylinder, etc Round Billet
  • Quality E255 / St45 / 1020 Bright Annealed Cold Rolled Steel Tube factory

    E255 / St45 / 1020 Bright Annealed Cold Rolled Steel Tube
    Product Name: E255 / St45 / 1020 Bright Annealing Precision Cold Rolled High Precision Seamless Steel Pipe Material: E235 , E255 , E355, St35, St45, St52, 1010, 1020, 4130 Size Range: OD: 6-88mm, WT: 1-15mm, Length: 5.8m/6m, maximal 11.8m Delivery Condition: +C, +LC, +SR, +A, +N Application: Fuel injection Pipe, Oil flow pipeline Automobile and motorcycle Shock Absorber Pipe Seat lifter Pipe Hydrau-cylinder Pipe Bicycle frame steel pipes Mechanical steel pipes for auto and
  • Quality Black Drill Rod Seamless Drill Pipe High Tolerance 3 - 11.8m Length 2 - 15m WT Size factory

    Black Drill Rod Seamless Drill Pipe High Tolerance 3 - 11.8m Length 2 - 15m WT Size
    XJY750 XJY850 wire-line drill pipes , Seamless cold drawing pipes for drill rod 1. Product Name: XJY850 Seamless Steel Tubing wire-line drill rods 2. Size Range: OD: 45-114.3m, WT: 2-15mm, Length:3m,3.06m 5.8m/6m, maximal 11.8m 3. Stable Quality with Comeptitive Price 4. Protective Atmosphere Heat Treatment, Surface is clean and smooth, without oxide scale 5. Good Extending and Bending Ability, Longer Work Life Product Name Seamless Steel Tubing wire-line drill rods Material

Send An Inquiry