ASTM A213 TP310H Seamless Austenitic Stainless Steel Tube
ASTM A213 TP310H (UNS S31009) Seamless Austenitic Stainless Steel Tubes are designed for high-temperature and high-pressure applications, offering superior oxidation resistance, creep strength, and thermal stability. With a higher carbon content than TP310S, TP310H delivers excellent elevated-temperature performance, making it ideal for boilers, heat exchangers, superheaters, and furnace components.
Key Features
- High carbon grade ensuring improved high-temperature strength
- Excellent resistance to oxidation and carburization
- Superior creep and stress-rupture properties
- Suitable for continuous exposure up to 1150°C
- Smooth inner surface for efficient fluid/heat transfer
- Ideal for high-pressure boiler and superheater systems
Equivalent Grades
| Standard | Grade / Designation |
|---|---|
| UNS | S31009 |
| WNR / Werkstoff Nr. | 1.4845 |
| EN | X8CrNi25-20 |
| JIS | SUH310 |
| BS | 310S24 (High Carbon Variant Equivalent) |
| GOST | 20Ch23N18 |
| AFNOR | Z12CNR25-20 |
| DIN | 1.4845 |
Available Sizes
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Outside Diameter: 1/4″ to 4″
-
Wall Thickness: SCH 5 to SCH 80
-
Custom sizes available on request
ASTM A213 TP310H Chemical Composition
| Element | % |
|---|---|
| Carbon (C) | 0.04 – 0.10 |
| Chromium (Cr) | 24.0 – 26.0 |
| Nickel (Ni) | 19.0 – 22.0 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 1.50 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Nitrogen (N) | ≤ 0.10 |
| Iron (Fe) | Balance |
ASTM A213 TP310H Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 515 MPa |
| Yield Strength (0.2% Offset) | ≥ 205 MPa |
| Elongation | ≥ 40% |
| Hardness (HBW) | ≤ 217 |
Physical Properties
| Property | Value |
|---|---|
| Density | 7.9 g/cm³ |
| Melting Point | 1400–1450°C |
| Thermal Conductivity | 14.2 W/m·K (at 100°C) |
| Electrical Resistivity | 0.99 µΩ·m |
| Modulus of Elasticity | 200 GPa |
Types of ASTM A213 TP310H Tubes
- Seamless Round Tubes
- Boiler & Superheater Tubes
- Heat Exchanger Tubes
- Instrumentation Tubes
- Furnace & Heater Tubes
Applications
- Power plant boilers
- Superheater & reheater tubes
- Heat exchangers
- Petrochemical refinery heaters
- Furnace tubes & radiant burners
- Thermal processing equipment
- High-temperature chemical plants
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