Stainless Steel Tube
Seamless and welded austenitic stainless steel tube for fluid transfer and structural applications
Premium 304/316 stainless steel tubes offer superior corrosion resistance, excellent pressure ratings, and outstanding reliability for heat exchange, fluid transport, and structural applications. Available seamless or welded in diverse diameters and wall thicknesses.
Quick Specifications
- Material Designation
- ASTM A 269 / ASTM A 213 / UNS S30400 (304) or S31600 (316)
- Werkstoff Number
- 1.4301 (304) or 1.4401 (316)
- Form
- Seamless or Welded Tube
- Tensile Strength
- 515 - 620 MPa (annealed)
- Yield Strength
- 205 - 310 MPa
- Elongation
- 30% minimum
Standards & Certifications
Product Description
Stainless steel tubes combine the corrosion resistance of austenitic stainless steel with the structural capability required for pressurized fluid transmission and heat exchanger applications. Available in both seamless and welded construction, the tubes are manufactured to strict dimensional tolerances and pressure ratings. The austenitic crystal structure ensures excellent toughness across temperature ranges from cryogenic to moderately elevated service, while the chromium-nickel composition provides unmatched resistance to atmospheric corrosion, seawater environments, and mildly aggressive chemical media.
Seamless tubes are produced by piercing and rolling heated ingots to eliminate welds and potential failure initiation points, making them ideal for critical applications requiring maximum reliability and pressure-cycling endurance. Welded tubes are produced through high-frequency induction or seam welding with final stress relief and surface treatment to ensure full joint integrity. Both construction methods deliver consistent mechanical properties and dimensional accuracy enabling precise system design.
Our stainless steel tubes are available in multiple outer diameters ranging from small instrument tubing to large diameter pipes suitable for major fluid transport applications. Wall thickness options accommodate diverse pressure ratings and fluid velocity requirements. The tubes are supplied in both straight lengths and coil form depending on application requirements, enabling flexible inventory management and installation flexibility.
With exceptional corrosion resistance, outstanding reliability across diverse operating conditions, and proven service history in countless industrial, commercial, and consumer applications, stainless steel tubes represent the premier choice for engineers specifying fluid handling systems where dependability and extended service life are paramount.
Specifications
| Material Designation | ASTM A 269 / ASTM A 213 / UNS S30400 (304) or S31600 (316) |
| Werkstoff Number | 1.4301 (304) or 1.4401 (316) |
| Form | Seamless or Welded Tube |
| Tensile Strength | 515 - 620 MPa (annealed) |
| Yield Strength | 205 - 310 MPa |
| Elongation | 30% minimum |
| Density | 8.0 g/cm³ |
| Pressure Rating | Up to 276 bar (depending on diameter/thickness) |
| Melting Point | 1399 - 1418°C |
| Thermal Conductivity at 100°C | 16.3 W/m·K |
| Modulus of Elasticity | 193 GPa |
| Maximum Service Temperature | 425°C (continuous) |
Chemical Composition
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.08 |
| Chromium (Cr) | 18.0 - 20.0 |
| Nickel (Ni) | 8.0 - 12.0 |
| Molybdenum (Mo) | ≤ 0.75 (316 grade) |
| Manganese (Mn) | ≤ 2.0 |
| Silicon (Si) | ≤ 1.0 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Iron (Fe) | Balance |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (Annealed) | 515 - 620 MPa |
| Yield Strength (Annealed) | 205 MPa minimum |
| Elongation | 30% minimum |
| Reduction of Area | 50% minimum |
| Hardness (Annealed) | 217 HV maximum |
| Impact Strength (Charpy V) | ≥ 100 J at 20°C |
| Fatigue Strength (1000 cycles) | ≥ 155 MPa |
| Creep Strength at 600°C/1000hrs | ≥ 100 MPa |
Key Features & Advantages
Applications
Heat Exchanger Systems
Fabrication of shell-and-tube heat exchanger internals, air-cooled condenser components, and thermal processing equipment where superior corrosion resistance and reliable pressure containment are essential.
Instrumentation and Control Systems
Manufacturing of process fluid connectors, measurement instrumentation tubing, and pneumatic/hydraulic lines where precise dimensional accuracy and non-magnetic properties are critical requirements.
Food and Beverage Processing
Production of product transport lines, CIP (clean-in-place) system piping, and process equipment tubing where hygienic properties, corrosion resistance, and ease of sterilization meet industry standards.
Pharmaceutical and Laboratory Equipment
Fabrication of process piping, reactor cooling systems, and analytical instrument connections where absolute material purity and biocompatibility are non-negotiable requirements.
Plumbing and Building Systems
Manufacturing of hot and cold water distribution tubing, oxygen delivery systems, and radiant heating/cooling systems in commercial and residential applications.
Industrial Cooling and Thermal Systems
Production of coolant circulation tubes, cooling tower water lines, and thermal processing equipment where reliable pressure containment and extended service life reduce maintenance costs.
Frequently Asked Questions
What is the difference between seamless and welded stainless steel tube?
Can stainless steel tubes be welded in the field during installation?
What is the maximum safe operating temperature for stainless steel tubes?
Are stainless steel tubes suitable for seawater applications?
How should stainless steel tubes be cleaned and maintained?
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