ASTM A269 TP316L Stainless Steel Tubes
ASTM A269 TP316L is a low-carbon variant of the 316 austenitic stainless steel grade, offering superior corrosion resistance, especially in chloride-rich and acidic environments. The “L” grade with reduced carbon content enhances resistance to carbide precipitation during welding, making TP316L ideal for welded structures, sanitary systems, high-purity piping, and corrosive industrial applications.
With excellent strength, smooth finish, and outstanding resistance to pitting and crevice corrosion due to molybdenum (Mo) addition, TP316L tubes are widely used in chemical processing, pharmaceutical manufacturing, food & beverage systems, marine environments, and heat exchanger applications.
Key Features
- Low carbon content for improved weldability
- Superior corrosion resistance in chloride and acidic environments
- Excellent pitting and crevice corrosion resistance (Mo-enhanced)
- High strength and durability
- Smooth internal finish promoting clean fluid transport
- Ideal for sanitary, hygienic, and high-purity applications
- Resistant to intergranular corrosion after welding
Specification
| Specification | Details |
|---|---|
| Standard | ASTM A269 |
| Grade | TP316L |
| UNS | S31603 |
| Material | Austenitic Stainless Steel (Low Carbon) |
| Process | Seamless / Welded |
| Surface Finish | Annealed & Pickled / Bright Annealed / Polished |
| Outer Diameter | 6 mm – 101.6 mm |
| Wall Thickness | 0.5 mm – 6 mm |
| Length | Single Random, Double Random, Cut-to-Length |
| Forms | Round, Square, Rectangular, U-Tube |
| Tolerance | As per ASTM A269 |
Equivalent Grades
| Standard | Grade |
|---|---|
| UNS | S31603 |
| EN | 1.4404 |
| JIS | SUS 316L |
| DIN | X2CrNiMo17-12-2 |
Available Sizes
- Outer Diameter: 6 mm – 101.6 mm
- Wall Thickness: 0.5 mm – 6 mm
- Length: Up to 6 meters or customized
- Forms: Round, Square, Rectangular, U-Bent Tubes
ASTM A269 TP316L Chemical Composition (%)
| Element | Min | Max |
|---|---|---|
| Carbon (C) | – | 0.030 |
| Manganese (Mn) | – | 2.00 |
| Silicon (Si) | – | 0.75 |
| Phosphorus (P) | – | 0.045 |
| Sulfur (S) | – | 0.030 |
| Chromium (Cr) | 16.0 | 18.0 |
| Nickel (Ni) | 10.0 | 14.0 |
| Molybdenum (Mo) | 2.00 | 3.00 |
| Nitrogen (N) | – | 0.10 |
| Iron (Fe) | Balance | Balance |
ASTM A269 TP316L Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 485 MPa min |
| Yield Strength (0.2% Proof) | 170 MPa min |
| Elongation | 40% min |
| Hardness (Rockwell B) | 95 max |
ASTM A269 TP316L Physical Properties
| Property | Value |
|---|---|
| Density | 8.0 g/cm³ |
| Melting Point | 1375 – 1400°C |
| Thermal Conductivity | 16.2 W/m·K |
| Electrical Resistivity | 0.74 μΩ·m |
| Modulus of Elasticity | 193 GPa |
| Specific Heat | 500 J/kg·K |
Types of ASTM A269 TP316L Tubes
- Seamless Tubes
- Welded Tubes
- Bright Annealed Tubes
- Annealed & Pickled Tubes
- Polished Tubes (180G, 320G, 600G)
- Heat Exchanger Tubes
- Instrumentation Tubes
- Sanitary / Hygienic Tubes
- U-Bend Tubes
Application
- Chemical & Petrochemical Processing
- Pharmaceutical & Biotech Production
- Food, Dairy & Beverage Industries
- Marine & Offshore Environments
- Heat Exchanger & Condenser Systems
- High-Purity Water Systems
- Desalination Plants
- Oil & Gas Processing
- Pulp & Paper Manufacturing
- Architectural & Structural Applications
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