| Property | TP310S | TP310 | TP310H |
| Tensile Strength | ≥515 MPa | ≥515 MPa | ≥485 MPa |
| Yield Strength | ≥205 MPa | ≥205 MPa | ≥170 MPa |
| Elongation | ≥35% | ≥35% | ≥35% |
| Hardness (HRB) | ≤90 | ≤90 | ≤90 |
| Creep Rupture Strength (1000°C, 1000h) | - | - | ≥60 MPa |
Thermal Properties
Maximum Service Temperature:
Continuous use: 1150°C
Intermittent use: 1200°C
Coefficient of Thermal Expansion: 14.5×10⁻⁶/°C (20-1000°C)
Thermal Conductivity: 16 W/m·K (at 100°C)
Dimension Range
Outer Diameter (OD): 6 mm to 1016 mm (0.24" to 40")
Wall Thickness: 1 mm to 65 mm (0.04" to 2.56")
Length: Customizable up to 12 meters (standard: 6 meters)
Manufacturing & Quality Control
Process Flow:
Vacuum induction melting (VIM) for chemical purity.
Hot-rolling of ingots into billets.
Cold-drawing/extrusion for precise dimensions.
Solution annealing at 1040-1120°C to refine grain structure.
Pickling to remove scale and ensure surface cleanliness.
Surface Treatments:
Pickled & Annealed (standard): Removes oxidation, ideal for high-temperature resistance.
Bright Annealed: Maintains surface luster in non-corrosive heat applications.
Polished: Ra ≤0.8μm for aesthetic or hygienic requirements.
Testing Regime:
100% Eddy Current Testing (ET) for surface defects.
Hydrostatic Pressure Testing (1.5x design pressure).
Grain size analysis and intergranular corrosion (IGC) testing per ASTM A262.
Application Scenarios
Industrial Furnaces & Heat Treatment
Furnace Components: Burner grids, retorts, muffles, and walking beams in annealing and carburizing furnaces operating at 1000°C+.
Recuperators & Heat Exchangers: Recovering waste heat in thermal processing lines, withstanding constant exposure to flue gases.
Fluidized Bed Furnaces: Coal combustors and wind boxes in power generation facilities.
Petrochemical & Refining
Catalytic Cracking Units: Tube hangers and reactor internals in petroleum refining, resisting high-temperature cracking gases.
Flares & Exhaust Systems: Constructing flare tips and exhaust ducts exposed to 1000°C+ flue gases containing SO₂ and CO₂.
Heat Recovery Systems: Transferring heat in heavy oil processing and visbreaking units.
Power Generation
Coal Gasification Plants: Internals of gasifiers and pulverized coal burners in integrated gasification combined cycle (IGCC) systems.
Steam Superheaters: Tubes in high-pressure boilers operating at 540°C+ in thermal power plants.
Waste-to-Energy Facilities: Incinerator pipes and ash handling systems in waste treatment plants.
Metal Processing
Steel Melting & Casting: Smelter equipment, continuous casting guides, and ladle components in steel mills.
Ore Reduction Furnaces: Retorts and ducts in iron ore reduction processes using direct reduced iron (DRI) methods.
Aerospace & Energy
Jet Engine Components: Exhaust nozzles and afterburner liners in aircraft engines (temporary exposure to 1200°C).
Nuclear Reactor Internals: Structural supports in high-temperature zones of nuclear reactors.
FAQ (Frequently Asked Questions)
Q: How does TP310S differ from TP310 at high temperatures?
A: TP310S’s lower carbon content (≤0.08%) prevents intergranular corrosion during welding, while TP310 (≤0.25% C) is more susceptible to carbide precipitation. Both offer similar oxidation resistance, but TP310S is preferred for welded high-temperature components.
Q: Can TP310S be used in wet or corrosive environments?
A: TP310S excels in dry, high-temperature conditions but is not optimized for aqueous corrosion. For wet environments, consider 316L or duplex steels. However, it resists mild acids and alkalis at room temperature.
Q: What welding precautions are needed for TP310S?
A: Use low-heat-input TIG welding with 310L filler wire. Preheat to 150-200°C for thick sections, and avoid continuous exposure to 425-815°C (sensitization range). Post-weld annealing is optional but improves ductility.
Q: How does carbon content affect TP310H’s performance compared to TP310S?
A: TP310H’s higher carbon (0.04-0.10%) stabilizes the austenitic structure, enhancing creep resistance at 650-1000°C. This makes it ideal for long-term high-temperature service, while TP310S prioritizes weldability for applications like furnace components.
Q: Can TP310S be used in cryogenic applications?
A: Yes, TP310S maintains ductility at -196°C, though its primary advantage is high-temperature performance. For cryogenics, 304/316 may be more cost-effective unless thermal cycling is required.
Q: What is the typical lead time for TP310S custom orders?
A: Standard sizes are available within 2-4 weeks. Custom dimensions or special finishes (e.g., bright annealing) require 6-8 weeks, including heat treatment and testing. Rush orders with expedited certification can be arranged for urgent projects.
