ASTM A269 TP316L Seamless Tube Austenitic Stainless Steel for Heat Exchanger & Instrumentation
ASTM A269 TP316L Seamless Tube Austenitic Stainless Steel for Heat Exchanger & Instrumentation
YUHONG GROUP is a leading manufacturer with over 35 years of industrial expertise and a global presence spanning 85 countries, dedicated to producing high-quality stainless steel tubing for precision applications. Our ASTM A269 TP316L Austenitic Stainless Steel Seamless Tubes are engineered to meet the stringent demands of the heat exchanger, instrumentation, and high-purity processing industries. Combining superior molybdenum-enhanced corrosion resistance with excellent formability and surface finish, we ensure reliable performance in demanding environments. Backed by complete traceability, international certifications, and a commitment to quality, we deliver solutions that meet the highest standards for global projects.
Chemical Composition of Grade TP316 (UNS S31600)
| Element | Requirement (%) |
| Carbon (C), max | 0.08 |
| Manganese (Mn), max | 2 |
| Phosphorus (P), max | 0.045 |
| Sulfur (S), max | 0.03 |
| Silicon (Si), max | 1 |
| Nickel (Ni) | 10.0 - 14.0 |
| Chromium (Cr) | 16.0 - 18.0 |
| Molybdenum (Mo) | 2.00 - 3.00 |
| Nitrogen (N) | 0.1 |
Heat Treatment and Hardness Requirements for Grade TP316L (UNS S31603)
| Parameter | Specification | Notes |
| Grade (ASTM) | TP316L | Austenitic Stainless Steel |
| UNS Designation | S31603 | |
| Austenitizing Temperature, min | 1900 °F [1040 °C] | |
| Hardness, max | 192 HBW / 200 HV or 90 HRB |
Summary of Test Requirements for TP316L (UNS S31603)
| Test Category | Specific Test |
| Mechanical Tests | Flaring Test (Seamless tubes) |
| Flange Test (Welded tubes) | |
| Hardness Test | |
| Reverse Flattening Test (Welded tubes only) | |
| Integrity Tests | Hydrostatic Test or Nondestructive Electric Test (Eddy Current/Ultrasonic) |
| Supplementary Tests (When Specified) | Stress-Relieved Annealing |
| Pneumatic Test | |
| Intergranular Corrosion Test |
The Application Advantages For The ASTM A213 TP316L Stainless Steel Seamless Tube
- Superior Corrosion Resistance: The addition of Molybdenum (2-3%) provides exceptional resistance to pitting and crevice corrosion, particularly in environments containing chlorides, making it significantly more durable than standard 304 grades in chemical processing, marine, and coastal applications.
- Excellent High-Temperature Performance: This tube maintains high strength and oxidation resistance at elevated temperatures, making it a reliable choice for continuous service in high-pressure boilers, superheaters, and heat exchangers.
- Enhanced Weldability and Safety: The low carbon content (≤0.030%) minimizes carbide precipitation during welding, which greatly reduces the risk of intergranular corrosion in the heat-affected zone and ensures the integrity of welded constructions.
- Seamless Construction for Reliability: The seamless manufacturing process ensures a homogeneous structure with no weak seams, offering superior pressure containment, higher fatigue strength, and greater reliability for critical high-pressure and high-purity applications.
- Hygienic and Easy-Clean Surface: The material accepts a high-quality surface finish (e.g., Bright Annealed or Electropolished), resulting in a smooth, non-porous surface that minimizes bacterial adhesion and facilitates cleaning, which is essential for pharmaceutical, food, and beverage industries.
- Broad Industry Applicability: Due to its combination of properties, it is a versatile solution for a wide range of demanding sectors, including power generation, offshore oil and gas, marine engineering, and pollution control equipment
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