ASTM A312 TP310H Austenitic Stainless Steel Pipes
ASTM A312 TP310H (UNS S31009) is a high-carbon, heat-resistant austenitic stainless steel pipe designed for extreme high-temperature environments. The increased carbon content improves creep strength, thermal stability, and mechanical performance under prolonged exposure to elevated temperatures. TP310H exhibits exceptional oxidation resistance up to 1150°C, making it ideal for furnace parts, heat exchangers, reformer tubes, and petrochemical heating systems.
Engineered for industries that require maximum durability, TP310H offers outstanding corrosion resistance in carburizing, sulfidizing, and cyclic thermal conditions.
Key Features
- High Carbon (H-grade) for superior high-temperature creep strength
- Excellent oxidation & scaling resistance up to ~1150°C
- Outstanding corrosion resistance in carburizing & sulfidizing atmospheres
- Superior thermal stability & high-temperature performance
- Excellent weldability & formability
- Stable microstructure under prolonged heating cycles
- Long service life in high-heat industrial environments
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| UNS | S31009 |
| EN/DIN | 1.4845 |
| JIS | SUS310H |
| BS | 310S31 (H Variation) |
Available Sizes
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Outer Diameter: 6 mm – 610 mm
-
Wall Thickness: 1.2 mm – 60 mm
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Pipe Schedules: SCH 5 – XXS
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Length: Up to 12 meters
ASTM A312 TP310H Chemical Composition
| Element | % |
|---|---|
| C | 0.04 – 0.10 |
| Mn | ≤ 2.00 |
| Si | ≤ 1.50 |
| P | ≤ 0.045 |
| S | ≤ 0.030 |
| Cr | 24.0 – 26.0 |
| Ni | 19.0 – 22.0 |
| N | ≤ 0.10 |
| Fe | Balance |
ASTM A312 TP310H Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 515 MPa |
| Yield Strength | ≥ 205 MPa |
| Elongation | ≥ 40% |
| Hardness | ≤ 192 HB |
ASTM A312 TP310H Physical Properties
| Property | Value |
|---|---|
| Density | 7.9 g/cm³ |
| Melting Range | 1400–1450°C |
| Thermal Conductivity | 14.2 W/m·K |
| Electrical Resistivity | 0.78 µΩ·m |
| Elastic Modulus | 200 GPa |
| Thermal Expansion | 15.3 µm/m°C (20–100°C) |
Types of TP310H Pipes
- Seamless Pipes
- Welded Pipes
- ERW Pipes
- EFW Pipes
- Hot Finished Pipes
- Cold Drawn Pipes
- Polished Pipes (180 / 240 / 320 / 600 Grit)
- Fabricated Pipes
Applications
- Furnace Components & Burners
- Heat Exchanger Tubing
- Petrochemical Reformer Tubes
- Boiler & Superheater Tubes
- Thermal Processing Equipment
- Kilns & Incinerator Parts
- Power Plant Heating Systems
- Carburizing & Annealing Furnaces
- High-Temperature Chemical Reactors
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