ASTM A213 UNS S31600 stainless steel seamless tubes
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As an important material for high-temperature and corrosion-resistant tubing, ASTM A213 UNS S31600 stainless steel seamless tubes are widely used in heat exchangers, condensers, and boiler systems, especially in chemical, pharmaceutical, food processing, and marine industries.
What Is ASTM A213 UNS S31600 seamless steel pipe?
UNS S31600 refers to austenitic stainless steel grade 316, known for its superior corrosion resistance due to the addition of 2.0–3.0% molybdenum. When manufactured under the ASTM A213 standard, these seamless tubes are designed for high-pressure, high-temperature applications such as heat exchangers and superheaters.
316 stainless steel seamless tube Chemical Composition
| Grade | TP316 | TP 316L |
| UNS Designation | S31600 | S31603 |
| Carbon (C) Max. | 0.08 | 0.035 |
| Manganese (Mn) Max. | 2.00 | 2.00 |
| Phosphorous (P) Max. | 0.045 | 0.045 |
| Sulphur (S) Max. | 0.030 | 0.030 |
| Silicon (Si) Max. | 1.00 | 1.00 |
| Chromium (Cr) | 16.0 – 18.0 | 16.0 – 18.0 |
| Nickel (Ni) | 10.0 – 14.0 | 10.0 – 14.0 |
| Molybdenum (Mo) | 2.0 – 3.0 | 2.0 – 3.0 |
316 stainless steel seamless tube Mechanical Properties
Alloy |
UNS | Spec. | Tensile Strength | Yield Strength | Elongation in 2 inch (min.) % | Grain Size Req. | Max. Hardness HRB Rockwell | ||
| MPa | ksi | ksi | MPa | ||||||
| TP316 | S31600 | A312 | 515 | 75 | 30 | 205 | 35 | - | 90 HRB |
| TP316L | S31603 | A213 | 485 | 70 | 25 | 170 | 35 | - | 90 HRB |
| TP316H | S31609 | - | - | - | - | - | - | 7 or coa rser |
- |
Physical Properties of 316 Stainless Steel pipe
| Alloy | UNS | Spec. | Density Specific Gravity kg/dm³ |
Modulus of Elasticity (x106 psi) |
Mean Coeff icient of Thermal Expansion (IN./IN ./°F x 10-6) |
Thermal Cond uctivity (BTU-in/ft2-h-°F) |
| 316 | S31600 | A312 | 7.98 | 28.0 | 9.2 | 116 |
| 316L | S31603 | A213 | 7.98 | 28.0 | 9.2 | 116 |
| 316H | S31609 | - | 7.98 | - | - | - |
Applications of ASTM A213 S31600 Tubes
Heat exchangers in chemical plants
Steam condensers
Food and beverage processing lines
Marine and offshore equipment
Power generation (superheater coils)
Clean-in-place (CIP) systems in pharmaceutical pipelines
What sizes are available for ASTM A213 316 seamless tubes?
Standard OD ranges from 6mm to 101.6mm, with wall thickness from 0.5mm to 10mm. Custom sizes and lengths can be provided upon request to meet specific project requirements.
Can ASTM A213 UNS S31600 tubes be used in high-temperature environments?
Yes. S31600 stainless steel tubes can withstand continuous service at temperatures up to 870°C (1600°F), making them ideal for heat exchangers and thermal processing.
What is the difference between UNS S31600 and 304 stainless steel tubes?
UNS S31600 differs from 304 stainless steel primarily in its chemical composition and corrosion resistance. The key difference is the addition of molybdenum (2–3%) in S31600, which significantly enhances its resistance to pitting and crevice corrosion, especially in chloride-rich environments such as seawater or chemical processing.
What is the difference between ASTM A213 TP316 and TP316L?
TP316L has a lower carbon content (≤0.03%) compared to TP316 (≤0.08%), which makes it more resistant to intergranular corrosion after welding, making TP316L ideal for welded structures in corrosive environments.
Where to buy ASTM A213 S31600 stainless steel seamless tubes?
GNEE supplies high-quality ASTM A213 UNS S31600 stainless steel seamless tubes with mill test certificates, competitive prices, and fast delivery.
For reliable sourcing, precision manufacturing, and cost-effective solutions, GNEE is your go-to supplier.Get a free quote or technical consultation today. Contact us now!info@gneestainless.com
