ASTM A511 MT 310S Stainless Steel Seamless Mechanical Tube
ASTM A511 MT 310S Stainless Steel Seamless Mechanical Tube Data and Properties
Detailed material data sheet for ASTM A511 MT 310S stainless steel tube: chemical composition, mechanical properties, thermal and electrical physical properties, international equivalents, and similar materials.
Hot-finished or cold-finished, annealing, pickling, and cutting to length
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ASTM A511 MT 310S Stainless Steel Seamless Mechanical Tube Introduction
ASTM A511 MT 310S is an austenitic stainless steel seamless mechanical tube designed for elevated temperature and corrosive environments. The grade 310S (UNS S31008) offers excellent oxidation resistance up to 1035°C (1900°F) and good resistance to sulfidation and carburization. Its high chromium (24–26%) and nickel (19–22%) contents, combined with a low carbon content (≤0.08%), minimize carbide precipitation and provide superior corrosion resistance in oxidizing and reducing atmospheres.
- High creep strength and rupture properties at elevated temperatures.
- Good ductility and weldability.
- Typical applications include furnace components, heat exchangers, burners, and annealing covers.
- Delivered in annealed and pickled condition as per ASTM A511.
This material is often selected for applications where 304 or 316 stainless steels would suffer from excessive scaling or thermal fatigue.
ASTM A511 MT 310S Stainless Steel Seamless Mechanical Tube Chemical Composition
The chemical composition of ASTM A511 MT 310S shall conform to the percent by weight limits specified for 310S in ASTM A511/A511M, which are identical to those in ASTM A240/A240M for UNS S31008. Iron is the balance.
| Chemical Element | Value (wt%) | Remarks |
|---|---|---|
| Carbon (C) | 0.08 max | |
| Manganese (Mn) | 2.00 max | |
| Phosphorus (P) | 0.045 max | |
| Sulfur (S) | 0.030 max | |
| Silicon (Si) | 1.50 max | |
| Chromium (Cr) | 24.0 – 26.0 | |
| Nickel (Ni) | 19.0 – 22.0 | |
| Iron (Fe) | Balance | Approximately 50% |
ASTM A511 MT 310S Stainless Steel Seamless Mechanical Tube Thermal and Electrical Physical Properties
Typical physical properties for 310S stainless steel at various temperatures. These values are provided for design guidance and are not part of ASTM A511 requirements. Data sourced from standard references for UNS S31008.
| Property | Typical Value | Unit | Test Conditions |
|---|---|---|---|
| Density (ρ) | 7.9 | g/cm³ | 20°C |
| Elastic Modulus (E) | 193 | GPa | 20°C |
| Shear Modulus (G) | 77 | GPa | 20°C, calculated from E and ν |
| Poisson's Ratio (ν) | 0.30 | — | 20°C |
| Thermal Expansion (α) | 14.4 | µm/m-°C | 20 – 100°C |
| Thermal Expansion (α) | 16.7 | µm/m-°C | 20 – 500°C |
| Thermal Expansion (α) | 18.0 | µm/m-°C | 20 – 1000°C |
| Thermal Conductivity (λ) | 14.9 | W/m-K | at 100°C |
| Thermal Conductivity (λ) | 18.6 | W/m-K | at 500°C |
| Thermal Conductivity (λ) | 22.5 | W/m-K | at 1000°C |
| Specific Heat Capacity | 500 | J/kg-K | 0 – 100°C |
| Electrical Resistivity (ρ_e) | 0.78 | µΩ-m | 20°C |
ASTM A511 MT 310S Stainless Steel Seamless Mechanical Tube Mechanical Properties
Mechanical properties for annealed ASTM A511 MT 310S seamless tube as required by the standard. Values apply to room temperature tensile testing on longitudinal specimens. Full-section tube samples or strip specimens may be used.
| Property | Value | Unit | Test Conditions |
|---|---|---|---|
| Tensile Strength (Rm) | 515 min | MPa | Room temperature, annealed |
| Yield Strength (ReH, 0.2% offset) | 205 min | MPa | Room temperature, annealed |
| Elongation (A) | 35 min | % | Gauge length 50 mm (2 in.), wall thickness ≤ 7.94 mm (5/16 in.) |
| Elongation (A) | 30 min | % | Gauge length 50 mm, wall thickness > 7.94 mm (5/16 in.) |
ASTM A511 MT 310S Stainless Steel Seamless Mechanical Tube Directly Equivalent Material Standards and Substitution Grades
| Country/Region | Standard | Grade/Designation | Remarks |
|---|---|---|---|
| USA | ASTM A240/A240M | UNS S31008, Type 310S | Plate, sheet, strip – same chemical composition |
| USA | ASTM A312/A312M | TP310S | Seamless and welded pipe |
| USA | ASTM A213/A213M | TP310S | Seamless boiler and heat exchanger tube |
| Europe | EN 10088-1 | 1.4845 (X6CrNi25-21) | Equivalent austenitic grade |
| International | ISO 4955 | X6CrNi25-21 | Heat-resisting steel |
| Japan | JIS G4303 | SUS310S | Stainless steel bars |
| China | GB/T 20878 | 06Cr25Ni20 (S31008) | Stainless steel, equivalent to 310S |
ASTM A511 MT 310S Stainless Steel Seamless Mechanical Tube Application Introduction
ASTM A511 MT 310S is widely used in high-temperature and corrosive environments where superior oxidation resistance is essential. It is suitable for both static and dynamic components.
Product Applications: Furnace rollers, radiant tubes, burners, muffles, Heat exchanger tubing, Boiler tubes, Annealing covers, Combustion chamber parts, Piping systems in high-temperature plants
Processed into products: Annealing radiant tubes, Burner nozzles, Thermocouple protection tubes, Recuperator tubing, Furnace conveyors, Exhaust gas systems, High-temperature flanges and fittings
Application industries: Heat Treatment, Chemical Processing, Power Generation, Petrochemical, Automotive (exhaust systems), Aerospace (engine components)
ASTM A511 MT 310S Stainless Steel Seamless Mechanical Tube Similar or Closely Related Materials
| Country/Region | Standard | Grade/Designation | Remarks |
|---|---|---|---|
| USA | ASTM A240 | UNS S31000 (Type 310) | Higher carbon (0.25% max), similar oxidation resistance but lower weldability |
| USA | ASTM A240 | UNS S31609 (Type 316H) | Lower Cr-Ni content, better resistance to reducing acids, lower maximum service temperature |
| USA | ASTM A240 | UNS N08330 (Alloy 330) | Higher nickel (34–37%), superior carburization resistance up to 1150°C |
| Europe | EN 10095 | 1.4835 (X9CrNiSiNCe21-11-2) | High-temperature grade with nitrogen and rare earths for enhanced oxidation resistance |
Notes:
The material may be susceptible to sigma phase embrittlement after prolonged exposure between 540°C and 900°C. Preheating and post-weld heat treatment are generally not required for 310S due to its fully austenitic structure, but caution is needed to avoid hot cracking. Low carbon content minimizes sensitization during welding.
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