ASTM A312 TP310S Austenitic Stainless Steel Pipe
ASTM A312 TP310S (UNS S31008) is a low-carbon, high-temperature austenitic stainless steel designed for superior resistance to oxidation, scaling, and thermal fatigue. The reduced carbon content provides enhanced weldability and minimizes carbide precipitation during welding, making TP310S ideal for high-temperature and moderately corrosive applications.
With a high chromium and nickel content, TP310S offers excellent strength and stability in temperatures up to 1100°C, widely used in heat treatment furnaces, petrochemical heaters, and thermal processing systems.
Key Features
- UNS S31008 low-carbon high-temperature stainless steel
- Excellent oxidation resistance up to 1100°C
- High nickel & chromium content for superior corrosion resistance
- Improved weldability due to low carbon composition
- Great creep resistance & mechanical stability
- Excellent structural integrity under thermal cycling
- Ideal for continuous and cyclic elevated temperatures
- Available in seamless, welded, ERW & EFW pipes
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| UNS | S31008 |
| WNR | 1.4845 |
| EN | X8CrNi25-21 |
| JIS | SUS 310S |
| BS / EU | 310S Stainless Steel |
Available Sizes
Outside Diameter (OD):
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6 mm – 610 mm
Wall Thickness (WT):
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1.0 mm – 50 mm
Length Options:
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Single Random Length (SRL)
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Double Random Length (DRL)
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Custom Cut-to-Length
ASTM A312 TP310S Chemical Composition
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.08 |
| 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 A312 TP310S Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 515 MPa |
| Yield Strength (0.2% Proof) | ≥ 205 MPa |
| Elongation | ≥ 40% |
| Hardness | ≤ 192 HBW |
ASTM A312 TP310S Physical Properties
| Property | Value |
|---|---|
| Density | 7.9 g/cm³ |
| Melting Range | 1400–1450°C |
| Thermal Conductivity | 14.2 W/m·K (at 100°C) |
| Electrical Resistivity | 0.78 µΩ·m |
| Specific Heat | 500 J/kg·K |
| Modulus of Elasticity | 193 GPa |
Available Types
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Seamless Stainless Steel Pipes
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Welded Stainless Steel Pipes
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ERW Pipes
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EFW Pipes
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Annealed & Pickled Pipes
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Polished Pipes (180–600 Grit)
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Custom Fabricated Pipes
Applications
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Heat Treatment & Annealing Furnaces
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Petrochemical & Chemical Processing Plants
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High-Temperature Process Piping
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Boiler & Superheater Tubes
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Thermal Processing Equipment
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Cement & Ceramic Kilns
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Power Generation Units
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Refinery Heaters & Radiant Tubes
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