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DIN 2391 ST 35 Seamless Precision Steel Tubes Manufacturer

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DIN 2391 ST 35 Seamless Precision Steel Tubes

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DIN 2391 ST 35 Seamless Precision Steel Tubes are high-precision cold drawn seamless carbon steel tubes manufactured according to DIN 2391 standards. These tubes offer excellent dimensional accuracy, smooth surface finish, superior mechanical strength, and tight tolerances. DIN 2391 St35 tubes are widely used in hydraulic systems, pneumatic lines, automotive components, engineering equipment, and precision machinery where reliable performance and exact dimensions are critical.

We supply DIN 2391 St35 seamless tubes in various sizes, wall thicknesses, and delivery conditions including NBK, BK, and BKW, ensuring compliance with international quality standards and industrial requirements.

What are DIN 2391 ST 35 Seamless Precision Steel Tubes?

DIN 2391 ST 35 Seamless Precision Steel Tubes are precision-engineered carbon steel tubes produced through a cold drawing process to achieve exceptional dimensional consistency and superior mechanical properties. The grade St35 is a low-carbon steel material specifically developed for applications requiring excellent machinability, weldability, and strength.

Unlike conventional steel tubing, DIN 2391 St35 seamless tube products are manufactured without welded joints, resulting in improved pressure resistance and structural integrity. Their precise dimensions and smooth internal surfaces make them ideal for hydraulic cylinders, automotive systems, instrumentation lines, and mechanical engineering applications.

Our tubes are manufactured under strict quality controls to ensure consistent performance in demanding operating environments.

Key Features of DIN 2391 St35 Seamless Tube

Some of the major advantages of DIN 2391 St35 seamless tubes include:

  • High dimensional accuracy
  • Excellent surface finish
  • Superior concentricity and straightness
  • Good weldability and machinability
  • Reliable pressure-bearing capability
  • Enhanced fatigue resistance
  • Consistent mechanical properties
  • Suitable for hydraulic and pneumatic systems
  • Tight manufacturing tolerances
  • Available in multiple delivery conditions

These characteristics make DIN 2391 ST 35 tubes one of the most preferred solutions across engineering and industrial sectors.

Cities We Delivered

New York City, Los Angeles, Chicago, Houston, Phoenix, Philadelphia, San Antonio, San Diego, Dallas, San Jose, Austin, Jacksonville, Fort Worth, Columbus, Charlotte, San Francisco, Indianapolis, Seattle, Denver, Washington, Boston, El Paso, Nashville, Detroit, Oklahoma City, Portland, Las Vegas, Memphis, Louisville, Baltimore, Milwaukee, Albuquerque, Tucson, Fresno, Mesa, Sacramento, Atlanta, Kansas City, Colorado Springs, Omaha, Raleigh, Miami, Long Beach, Virginia Beach, Oakland, Minneapolis, Tulsa, Tampa, Arlington, New Orleans, Wichita, Bakersfield, Cleveland, Aurora, Anaheim, Honolulu, Santa Ana, Riverside, Corpus Christi, Lexington, Henderson, Stockton, Saint Paul, Cincinnati, St. Louis, Pittsburgh, Greensboro, Lincoln, Anchorage, Plano, Orlando, Irvine, Newark, Durham, Chula Vista, Toledo, Fort Wayne, St. Petersburg, Laredo, Jersey City, Chandler, Madison, Lubbock, Scottsdale, Reno, Buffalo, Gilbert, Glendale, North Las Vegas, Winston-Salem, Chesapeake, Norfolk, Fremont, Garland, Irving, Hialeah, Richmond, Boise, Spokane, Baton Rouge, Tacoma, San Bernardino, Modesto, Fontana, Des Moines, Moreno Valley, Santa Clarita, Fayetteville, Birmingham, Oxnard, Rochester, Port St. Lucie, Grand Rapids, Huntsville, Salt Lake City, Frisco, Yonkers, Amarillo, Glendale, Huntington Beach, McKinney, Montgomery, Augusta, Aurora, Akron, Little Rock, Tempe, Columbus, Overland Park, Grand Prairie, Tallahassee, Cape Coral, Mobile, Knoxville, Shreveport, Worcester, Ontario, Vancouver, Sioux Falls, Chattanooga, Brownsville, Fort Lauderdale, Providence, Newport News, Rancho Cucamonga, Santa Rosa, Peoria, Oceanside, Elk Grove, Salem, Pembroke Pines, Eugene, Garden Grove, Cary, Fort Collins, Corona, Springfield, Jackson, Alexandria, Hayward, Clarksville, Lakewood, Lancaster, Salinas, Palmdale, Hollywood, Springfield, Macon, Kansas City, Sunnyvale, Pomona, Killeen, Escondido, Pasadena, Naperville, Bellevue, Joliet, Murfreesboro, Midland, Rockford, Paterson, Savannah, Bridgeport, Torrance, McAllen, Syracuse, Surprise, Denton, Roseville, Thornton, Miramar, Pasadena, Mesquite, Olathe, Dayton, Carrollton, Waco, Orange, Fullerton, Charleston, West Valley City, Visalia, Hampton, Gainesville, Warren, Coral Springs, Cedar Rapids, Round Rock, Sterling Heights, Kent, Columbia, Santa Clara, New Haven, Stamford, Concord, Elizabeth, Athens, Thousand Oaks, Lafayette, Simi Valley, Topeka, Norman, Fargo, Wilmington, Abilene, Odessa, Columbia, Pearland, Victorville, Hartford, Vallejo, Allentown, Berkeley, Richardson, Arvada, Ann Arbor, Rochester, Cambridge, Sugar Land, Lansing, Evansville, College Station, Fairfield, Clearwater, Beaumont, Independence, Provo, West Jordan, Murrieta, Palm Bay, El Monte, Carlsbad, North Charleston, Temecula, Clovis, Springfield, Meridian, Westminster, Costa Mesa, High Point, Manchester, Pueblo, Lakeland, Pompano Beach, West Palm Beach, Antioch, Everett, Downey, Lowell, Centennial, Elgin, Richmond, Peoria, Broken Arrow, Miami Gardens, Billings, Jurupa Valley, Sandy Springs, Gresham, Lewisville, Hillsboro, Ventura, Greeley, Inglewood, Waterbury, League City, Santa Maria, Tyler, Davie, Lakewood, Daly City, Boulder, Allen, West Covina, Sparks, Wichita Falls, Green Bay, San Mateo, Norwalk, Rialto, Las Cruces, Chico, El Cajon, Burbank, South Bend, Renton, Vista, Davenport, Edinburg, Tuscaloosa, Carmel, Spokane Valley, San Angelo, Vacaville, Clinton, Bend, Woodbridge.

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DIN 2391 St 35 Dimensional Tolerances Chart

One of the primary reasons industries prefer DIN 2391 precision tubing is its extremely tight dimensional tolerances.

Outside Diameter (OD)

OD Tolerance

Up to 30 mm

±0.08 mm

30 mm to 50 mm

±0.10 mm

Above 50 mm

As per DIN 2391 standard

Wall Thickness Tolerance

Wall Thickness

Tolerance

Up to 3 mm

±10%

Above 3 mm

As per DIN specification

DIN 2391 St 35 Chemical Composition

The following table shows the typical DIN 2391 St 35 chemical composition:

Element

Composition (%)

Carbon (C)

≤ 0.17

Silicon (Si)

≤ 0.35

Manganese (Mn)

0.40 – 1.20

Phosphorus (P)

≤ 0.025

Sulfur (S)

≤ 0.025

The controlled chemical composition contributes to the excellent weldability, formability, and mechanical performance of DIN 2391 St35 tubes.

St 35 Tube Mechanical Properties and Yield Strength

Property

Value

Tensile Strength

480 – 630 MPa

Yield Strength

≥ 315 MPa

Elongation

≥ 20%

Hardness

As per delivery condition

The above St 35 tube mechanical properties and yield strength values may vary slightly depending on the heat treatment condition and tube dimensions.

DIN 2391 St 35 Cold Drawn Tube Manufacturing Process

The manufacturing process of DIN 2391 St 35 cold drawn tube products begins with high-quality seamless mother tubes. These tubes undergo precision cold drawing operations to reduce dimensional variations and improve surface quality.

Manufacturing Steps

  1. Seamless tube production
  2. Pickling and cleaning
  3. Cold drawing process
  4. Stress relieving or heat treatment
  5. Straightening
  6. Non-destructive testing
  7. Dimensional inspection
  8. Final quality verification

The cold drawing process enhances the tube’s strength, surface finish, and tolerance control, making it suitable for critical engineering applications.

DIN 2391 St 35 NBK Seamless Tube

DIN 2391 St 35 NBK seamless tube refers to tubes supplied in a normalized condition after cold forming. NBK (Normalised) tubes provide an ideal combination of strength, toughness, and machinability.

Benefits of NBK Tubes

  • Improved ductility
  • Reduced internal stress
  • Better cold-forming capability
  • Consistent mechanical properties
  • Enhanced welding performance

NBK tubes are commonly selected for hydraulic cylinders, automotive components, and structural precision applications.

Applications of DIN 2391 ST 35 Seamless Precision Steel Tubes

Due to their exceptional precision and strength, DIN 2391 St35 tubes are extensively used in numerous industries.

Major Applications

  • Hydraulic cylinder manufacturing
  • Pneumatic systems
  • Automotive engineering
  • Agricultural machinery
  • Construction equipment
  • Industrial automation
  • Machine tools
  • Material handling systems
  • Instrumentation equipment
  • Oil and gas support systems

The superior dimensional accuracy helps improve system efficiency and operational reliability.

DIN 2391 St 35 Precision Tubing Price List

The DIN 2391 St 35 precision tubing price list varies depending on several factors:

  • Tube size and wall thickness
  • Quantity ordered
  • Delivery condition (BK, BKW, NBK)
  • Testing requirements
  • Packaging specifications
  • Export destination
  • Raw material market fluctuations

For the latest pricing and bulk order discounts, contact our sales team with your required dimensions and quantities

Why Choose Seamless Precision Tubes for Hydraulic Systems?

Hydraulic applications demand tubing that can withstand high pressures while maintaining leak-free performance. DIN 2391 St35 seamless tubes offer:

  • Excellent burst pressure resistance
  • Smooth internal surfaces for fluid flow
  • Reduced pressure loss
  • Consistent wall thickness
  • Enhanced fatigue life
  • Long-term reliability

This makes them a preferred choice for hydraulic cylinder manufacturers and OEM equipment producers worldwide.

Related Products

  • DIN 2391 ST 52 Seamless Precision Tubes
  • DIN 2391 ST 37 Seamless Tubes
  • EN 10305 Precision Steel Tubes
  • Hydraulic Cylinder Tubes
  • Honed Tubes
  • Chrome Plated Bars
  • ASTM A519 Seamless Mechanical Tubes
  • Cold Drawn Seamless Tubes

DIN 2391 ST 35 Seamless Tube Supplier, Manufacturer & Exporter

As a trusted DIN 2391 ST 35 seamless tube supplier, we provide precision-engineered tubing solutions for customers across diverse industries. Our inventory includes a wide range of cold drawn seamless tubes manufactured according to DIN 2391 specifications.

Why Customers Choose Us

  • Extensive stock availability
  • Global export capabilities
  • Competitive pricing
  • Strict quality control
  • Mill test certificates
  • Fast delivery schedules
  • Custom cut lengths available
  • Technical support from experienced professionals

As a leading St 35 seamless precision tubes exporter, we supply products that meet international standards for dimensional accuracy, mechanical performance, and long-term reliability.

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