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DIN2391 Smooth Surface Seamless Steel Tube

DIN2391 Smooth Surface Seamless Steel Tube
DIN2391 Smooth Surface Seamless Steel Tube
DIN2391 Smooth Surface Seamless Steel Tube DIN2391 Smooth Surface Seamless Steel Tube DIN2391 Smooth Surface Seamless Steel Tube DIN2391 Smooth Surface Seamless Steel Tube DIN2391 Smooth Surface Seamless Steel Tube DIN2391 Smooth Surface Seamless Steel Tube DIN2391 Smooth Surface Seamless Steel Tube DIN2391 Smooth Surface Seamless Steel Tube DIN2391 Smooth Surface Seamless Steel Tube DIN2391 Smooth Surface Seamless Steel Tube
Basic Information
Place of Origin: China
Brand Name: Pipeway steel
Certification: ISO9001
Model Number: Cold drawn steel tube
Minimum Order Quantity: 1 tons
Packaging Details: Bundles package, wooden boxes
Delivery Time: 45 days
Payment Terms: T/T
Supply Ability: 3000 tons per month
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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
Highlight:

DIN2391 seamless steel tube

,

cold drawn steel tubing

,

smooth surface steel pipe

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.

Tag:

cold drawn welded tubes,

erw welded pipe,

seamless black steel pipe

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