| Property | TP310 | TP310S | 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 |
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)
Thermal Properties
Maximum Service Temperature:
Coefficient of Thermal Expansion: 14.5×10⁻⁶/°C (20-1000°C)
Thermal Conductivity: 16 W/m·K (at 100°C)
Surface & Testing
Surface Treatments:
Pickled & Annealed (standard): Removes scale, ideal for high-temperature oxidation resistance.
Bright Annealed: Maintains surface luster in non-corrosive heat applications.
Polished: Ra ≤0.8μm for aesthetic or hygienic requirements.
Quality Control:
100% Eddy Current Testing (ET) for surface defects.
Hydrostatic Pressure Testing (1.5×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.
Recuperators & Heat Exchangers: Recovering waste heat in thermal processing lines, withstanding 1000°C+ temperatures.
Fluidized Bed Furnaces: Coal combustors and wind boxes in power generation.
Petrochemical & Refining
Catalytic Cracking Units: Tube hangers and reactor internals in petroleum refining.
Flares & Exhaust Systems: Resisting oxidation in high-temperature flue gases (SO₂, CO₂).
Heat Recovery Systems: Transferring heat in heavy oil processing.
Power Generation
Coal Gasification Plants: Internals of gasifiers and pulverized coal burners.
Steam Superheaters: Tubes in high-pressure boilers operating at 540°C+
Waste-to-Energy Facilities: Incinerator pipes and ash handling systems.
Metal Processing
Steel Melting & Casting: Smelter equipment, continuous casting guides, and ladle components.
Ore Reduction Furnaces: Retorts and ducts in iron and steel production.
Aerospace & Energy
FAQ (Frequently Asked Questions)
Q: How does TP310 differ from 304 stainless steel at high temperatures?
A: TP310’s higher Cr/Ni content (24-26% Cr, 19-22% Ni vs. 304’s 18% Cr, 8% Ni) provides superior oxidation resistance above 800°C. 304 may scale or lose strength, while TP310 maintains integrity up to 1150°C.
Q: Can TP310 be used in wet or corrosive environments?
A: TP310 excels in dry, high-temperature conditions but is not optimized for aqueous corrosion. For wet environments, consider 316L or duplex steels. However, TP310S resists intergranular corrosion in mildly acidic solutions.
Q: What welding precautions are needed for TP310?
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?
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, unlike TP310S, which prioritizes weldability.
Q: Can TP310 be used in cryogenic applications?
A: Yes, TP310 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 TP310 custom orders?
A: Standard sizes (310/310S) are available within 2-4 weeks. TP310H or special dimensions require 6-8 weeks, including heat treatment and testing. Rush orders with expedited certification can be arranged.
