High Temperature Stainless Steel SS 310 Seamless Pipe For Extreme Heat Service
SS 310 pipe is an austenitic stainless steel grade specifically designed for high-temperature applications. With excellent oxidation resistance and good strength at elevated temperatures, this grade is the preferred choice for furnace parts, heat treatment equipment, and high-temperature industrial piping systems.
The 310 grade contains high levels of chromium (24-26%) and nickel (19-22%), which provide exceptional resistance to scaling at temperatures up to 1100°C (2012°F) under intermittent service and 1150°C (2100°F) under continuous service. This makes SS 310 pipe far superior to standard 304 or 316 grades when heat resistance is the primary requirement.
UNS S31000 is the standard designation for this grade, and ASTM A312 is the governing specification for seamless and welded austenitic stainless steel pipe intended for high-temperature and general corrosive service. Both seamless and welded constructions are available, depending on your application requirements.
Beyond high-temperature performance, SS 310 pipe also offers good resistance to sulfidation and carburization, making it suitable for reducing or oxidizing atmospheres. However, it is important to note that 310 has lower corrosion resistance when exposed to aqueous solutions compared to 316L, so its primary application focus remains thermal.
Key advantages of SS 310 pipe:
- Outstanding oxidation resistance up to 1100°C (2012°F)
- High creep strength for sustained high-temperature loading
- Resistance to carburization and sulfidation in aggressive furnace atmospheres
- Good ductility and weldability for fabrication
- Suitable for both continuous and intermittent high-temperature service
| Parameter | Details |
|---|---|
| Product Name | SS 310 Stainless Steel Pipe |
| Standard | ASTM A312 / ASME SA312 |
| Grade | TP310 (UNS S31000) |
| EN Equivalent | 1.4845 |
| Trade Names | 310 Stainless, Incoloy 310 (equivalent) |
| Form | Seamless Pipe (SMLS) or Welded Pipe (ERW / EFW) |
| Manufacturing Process | Hot finished or cold drawn (seamless) / Rolled and welded (welded) |
| Size Range (NPS) | 1/8" to 24" (larger diameters available upon request) |
| Wall Thickness | SCH 5S to SCH XXS (per ASME B36.10 / B36.19) |
| Length | Single random (5-7m), double random (10-13m), or exact cut |
| Pipe Ends | Plain End (PE), Beveled End (BE), Threaded (T&C) |
| Packing Method | Bundled with steel strapping, plastic caps on ends, waterproof wrapping for sea freight |
| Certification | Mill Test Certificate EN 10204 Type 3.1 or 3.2 |
The chemical composition of SS 310 pipe is strictly controlled to ensure high-temperature performance and oxidation resistance.
| Element | Content (% by weight) |
|---|---|
| Carbon (C) | 0.25 max |
| Manganese (Mn) | 2.00 max |
| Silicon (Si) | 1.50 max |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.030 max |
| Chromium (Cr) | 24.00 – 26.00 |
| Nickel (Ni) | 19.00 – 22.00 |
| Molybdenum (Mo) | 0.75 max (typically not specified) |
| Iron (Fe) | Balance |
Note: The high chromium and nickel content is responsible for the superior oxidation resistance and scaling resistance at elevated temperatures.
SS 310 pipe delivers the following mechanical properties in the annealed condition:
| Property | Required Value (Typical) |
|---|---|
| Tensile Strength | 515 MPa (75 ksi) min |
| Yield Strength (0.2% offset) | 205 MPa (30 ksi) min |
| Elongation (2" or 50mm) | 35% min (seamless) / 30% min (welded) |
| Hardness (Rockwell B) | 85 HRB max |
| Modulus of Elasticity (20°C) | 200 GPa (29,000 ksi) |
| Density | 7.98 g/cm³ (0.288 lb/in³) |
High-Temperature Tensile Strength (Typical values at elevated temperatures):
| Temperature (°C) | Tensile Strength (MPa) | Yield Strength (MPa) |
|---|---|---|
| 400°C | 470 | 170 |
| 500°C | 440 | 160 |
| 600°C | 410 | 150 |
| 700°C | 370 | 140 |
| 800°C | 310 | 120 |
| 900°C | 220 | 80 |
Seamless Pipe
Produced by hot extruding or cold drawing solid billets to form a hollow tube. Seamless construction provides uniform strength with no weld seam, making it ideal for high-pressure and high-temperature applications.
Welded Pipe (ERW / EFW)
Formed from flat rolled coils, then welded longitudinally. Electric Fusion Welding (EFW) is used for larger diameters. Welded pipes are available with or without post-weld heat treatment.
| Finish | Description |
|---|---|
| Pickled (AP) | Acid pickled to remove mill scale and heat tint |
| Bright Annealed (BA) | Annealed in controlled atmosphere for a bright, oxide-free surface |
| Polished | Mechanical polishing to various grit finishes (180#, 240#, 400#, etc.) |
| As-Descaled (AD) | Rough surface with scale removed but not polished |
SS 310 pipe is specified for high-temperature applications across multiple industries where oxidation resistance and hot strength are critical.
- Furnace rolls and radiant tubes
- Retorts, muffles, and burner nozzles
- Heat exchanger tubes for high-temperature process gases
- Annealing covers and boxes
The excellent oxidation resistance of SS 310 pipe prevents scaling and maintains integrity even after repeated thermal cycling.
- Catalytic reformer tubes
- Pyrolysis tubes in ethylene production
- High-temperature process piping
- Sulfur recovery unit components
SS 310 pipe resists carburization and sulfidation in hydrocarbon processing environments.
- Superheater and reheater tubes in coal-fired boilers
- High-temperature steam lines
- Gas turbine exhaust ducting
- Preheaters and cyclones
- Kiln components
- Clinker cooler ducting
- Roaster and calciner tubes
- High-temperature gas handling systems
- Exhaust gas recirculation (EGR) system components
- Diesel particulate filter housings
For inquiries, technical data sheets, or a quotation for SS 310 stainless steel pipe (ASTM A312 TP310 / UNS S31000) for high-temperature applications, please contact our sales team.
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- Mill test certificates with full traceability
- Competitive pricing for both standard sizes and custom orders
- On-time delivery to global destinations
- Technical support from material selection to installation
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