A312 / SA312 TP310S (UNS S31008) Stainless Steel Seamless Pipe, Superheater And Reheater Tubing
A312 / SA312 TP310S (UNS S31008) Stainless Steel Seamless Pipe, Superheater And Reheater Tubing
Overview of A312 TP310S Stainless Steel Seamless Pipe
A312 TP310S Stainless Steel Seamless Pipe is a high-temperature, corrosion-resistant pipe made from low-carbon 310S austenitic stainless steel. Manufactured under the ASTM A312 standard, it is ideal for use in extreme environments such as furnaces, heat exchangers, and petrochemical plants. The alloy's high chromium and nickel content provides excellent resistance to oxidation, sulfidation, and carburization, while the low carbon content improves weldability and minimizes the risk of intergranular corrosion.
Why Use TP310S Instead of TP310?
- TP310S has lower carbon content, reducing the risk of sensitization and intergranular corrosion after welding or prolonged exposure to high temperatures.
- Better for welded structures and components that operate in cyclic high-temperature environments.
Specification
ASTM A312/A312M-21 Standard Specification for Seamless Cold Worked Austenitic Stainless Steel Pipes
| Specifications | ASTM A/ASME SA213 / A249 / A269 |
| Dimensions | ASTM, ASME and API |
| 310S Tubes Size | 10.29 OD (mm) – 762 OD (mm) |
| Thickness | 0.35 OD (mm) to 6.35 OD (mm) in thickness ranging from 0.1mm to 1.2mm. |
| Schedule | SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS |
| Type | Seamless / ERW / Welded / Fabricated |
| Form | Round Tubes, Custom Tubes, Square Tubes, Rectangular Tubes, “U” Shape, Hydraulic Tubes |
| Length | Single Random, Double Random & Cut Length. |
| End | Plain End, Beveled End, Treaded |
Equivalent Grades of TP310S (UNS S31008)
| Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS | ||
| BS | En | No | Name | ||||
| 310S | S31008 | 310S16 | - | 1.4845 | X8CrNi25-21 | 2361 | SUS 310S |
Chemical Composition of TP310S (UNS S31008) Seamless Pipe
| Grade | C | Mn | Si | P | S | Cr | Ni | |
| 310S | min. | – | – | – | – | – | 24.0 | 19.0 |
| max. | 0.08 | 2.00 | 1.50 | 0.045 | 0.030 | 26.0 | 22.0 | |
Mechanical Properties of TP310S (UNS S31008) Seamless Pipe
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 310S | 515 | 205 | 40 | 95 | 217 |
Physical Properties of TP310S (UNS S31008) Seamless Pipe
| Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (m/m/0C) | Thermal Conductivity (W/m.K) | Specific Heat 0-1000C (J/kg.K) | Electrical Resistivity (n.m) | |||
| 0-100°C | 0-315°C | 0-538°C | at 100°C | at 500°C | |||||
| 310S | 7750 | 200 | 15.9 | 16.2 | 17.0 | 14.2 | 18.7 | 500 | 720 |
A312 TP310S Pipe Applications
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Heat exchangers
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Furnace components
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Petrochemical plants
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Thermal processing equipment
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Power generation (especially superheater and reheater tubing)
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High-temperature service piping in refineries
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