JIS G4304 & G4305 SUS310S Austenitic Stainless Steel Plate/Coil
SUS310S Austenitic Stainless Steel Plate/Coil per JIS G4304 & G4305
Comprehensive material data for SUS310S austenitic stainless steel including chemical composition, mechanical and physical properties, international equivalents, and application guidance.
Hot rolling, cold rolling, solution annealing, pickling, descaling, cutting, forming, welding, machining
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JIS G4304 & G4305 SUS310S Austenitic Stainless Steel Plate/Coil Introduction
SUS310S is an austenitic chromium-nickel stainless steel with low carbon content, providing excellent oxidation resistance at elevated temperatures up to 1050°C (1922°F). It combines good strength and corrosion resistance with excellent resistance to scaling and carburization in high-temperature service. The alloy is non-magnetic in the annealed condition and can be easily formed and welded. Its high chromium (~25%) and nickel (~20%) content ensure superior performance in oxidizing, reducing, and carburizing atmospheres. Common forms include plate, coil, sheet, and strip, delivered in solution-annealed or as-hot-rolled condition, often with pickled surface finish.
JIS G4304 & G4305 SUS310S Austenitic Stainless Steel Plate/Coil Chemical Composition
The chemical composition of SUS310S as specified in JIS G4304 ensures austenitic microstructure with enhanced high-temperature oxidation resistance. Low carbon minimizes carbide precipitation during welding, improving intergranular corrosion resistance.
| Chemical Element | Standard Value (wt%) | Remarks |
|---|---|---|
| Carbon (C) | ≤ 0.08 | |
| Silicon (Si) | ≤ 1.50 | |
| Manganese (Mn) | ≤ 2.00 | |
| Phosphorus (P) | ≤ 0.045 | |
| Sulfur (S) | ≤ 0.030 | |
| Nickel (Ni) | 19.00 - 22.00 | |
| Chromium (Cr) | 24.00 - 26.00 | |
| Iron (Fe) | Balance | Approximately 51% min |
JIS G4304 & G4305 SUS310S Austenitic Stainless Steel Plate/Coil Thermal and Electrical Physical Properties
Typical physical properties of SUS310S at room temperature and elevated temperatures. Data compiled from standard references and may vary slightly with processing. The alloy is non-magnetic in solution-annealed condition.
| Property | Standard Value | Unit | Test Condition |
|---|---|---|---|
| Density (ρ) | 7.98 | g/cm³ | 20°C |
| Elastic Modulus (E) | 200 | GPa | 20°C, dynamic method |
| Shear Modulus (G) | 77 | GPa | 20°C |
| Poisson's Ratio (ν) | 0.30 | - | 20°C |
| Thermal Expansion Coefficient (α) | 15.9 | 10⁻⁶/K (µm/m·°C) | 20-100°C |
| Thermal Expansion Coefficient (α) | 16.2 | 10⁻⁶/K | 20-300°C |
| Thermal Expansion Coefficient (α) | 17.5 | 10⁻⁶/K | 20-500°C |
| Thermal Expansion Coefficient (α) | 18.0 | 10⁻⁶/K | 20-1000°C |
| Thermal Conductivity (λ) | 14.0 | W/m·K | 100°C |
| Thermal Conductivity (λ) | 18.8 | W/m·K | 500°C |
| Thermal Conductivity (λ) | 21.5 | W/m·K | 1000°C |
| Specific Heat (c_p) | 500 | J/kg·K | 0-100°C |
| Electrical Resistivity (ρ_e) | 0.78 | µΩ·m | 20°C |
JIS G4304 & G4305 SUS310S Austenitic Stainless Steel Plate/Coil Mechanical Properties
Mechanical properties of SUS310S in solution-annealed condition per JIS G4304. Values represent minimum requirements unless noted. Elongation varies with thickness. Hardness values are typical maximums. Bending test applies to plates with appropriate thickness as per standard.
| Property | Standard Value | Unit | Test Condition |
|---|---|---|---|
| Tensile Strength (Rm) | ≥ 520 | MPa | Room temperature, solution-annealed condition |
| Yield Strength (ReH, 0.2% offset) | ≥ 205 | MPa | Room temperature, solution-annealed condition |
| Elongation (A) | ≥ 40 | % | Thickness ≤ 8 mm (gauge length 50 mm) |
| Elongation (A) | ≥ 35 | % | Thickness > 8 mm and ≤ 75 mm |
| Hardness | ≤ 187 | HBW | |
| Hardness | ≤ 90 | HRB | |
| Hardness | ≤ 200 | HV | |
| Bending Test | Crack free | - | 180° bend, bend radius = thickness (r=t), for t ≤ 8 mm |
JIS G4304 & G4305 SUS310S Austenitic Stainless Steel Plate/Coil Fully Equivalent Standards and Substitutable Grades
| Country/Region | Standard | Grade | Note |
|---|---|---|---|
| USA | ASTM A240/A240M, ASME SA-240 | 310S (UNS S31008) | Identical chemical and mechanical properties |
| European Union | EN 10088-2, EN 10095 | X8CrNi25-21 (1.4845) | Equivalent high-temperature grade |
| China | GB/T 4237, GB/T 3280 | 06Cr25Ni20 (formerly 0Cr25Ni20) | Direct equivalent |
| ISO | ISO 15510 | X8CrNi25-21 | International standard equivalent |
| United Kingdom | BS EN 10088-2/BS 1449 | 310S24 | Historical BS equivalent |
| France | NF EN 10088-2 | Z8CN25-21 | AFNOR designation |
| Germany | DIN EN 10088-2 | X8CrNi25-21 (1.4845) | DIN designation |
| Italy | UNI EN 10088-2 | X8CrNi2521 | UNI designation |
JIS G4304 & G4305 SUS310S Austenitic Stainless Steel Plate/Coil Application Introduction
SUS310S is widely used in high-temperature environments up to 1050°C in continuous service and up to 1100°C in intermittent service. It resists oxidation and scaling in air, combustion gases, and sulfur-containing atmospheres. It is suitable for carburizing and reducing environments but not for highly corrosive acids like hydrochloric. Fabrication includes forming, welding, and machining. Post-weld annealing is generally not required for thicknesses under 6 mm, but may be beneficial for thick sections to relieve stress.
Product Applications: Furnace parts: radiant tubes, muffles, retorts, conveyor belts, Heat exchangers, recuperators, and boiler components, Petrochemical reactor internals, catalyst support grids, Kiln linings and burners, Automotive exhaust piping and catalytic converters, Gas turbine combustion chambers and transition ducts, Flue gas ducts and stack liners, Food processing ovens and conveyor systems
Processed into products: Radiant tubes and furnace rolls, Muffle walls and baskets, Heat exchanger tubesheets and baffles, Burner tips and flame holders, Thermocouple protection tubes, Annealing and carburizing boxes, Expansion bellows, Welded wire mesh belts, Scraper bars and quench fixtures
Application industries: Power Generation, Petrochemical Processing, Heat Treatment and Industrial Furnaces, Chemical Processing, Automotive (Exhaust Systems), Aerospace (Auxiliary Power Units), Food Processing Equipment, Waste Incineration, Refining and Gasification
JIS G4304 & G4305 SUS310S Austenitic Stainless Steel Plate/Coil Similar or Alternative Material Recommendations
| Country/Region | Standard | Grade | Note |
|---|---|---|---|
| USA | ASTM A240 | 310 (UNS S31000) | Higher carbon (≤0.25) for better high-temperature strength, but reduced weldability and resistance to sensitization |
| USA | ASTM A240 | 309S (UNS S30908) | Lower Cr & Ni (22-24% Cr, 12-15% Ni), lower oxidation resistance up to 980°C |
| EU | EN 10095 | X15CrNiSi25-21 (1.4841) | Higher carbon and silicon for improved oxidation resistance at cyclic temperatures, electrical heating elements |
| Global | ASTM A297 | HK30 cast | Cast equivalent for higher creep strength in furnace parts |
| Global | Various | 253MA (S30815) | Contains nitrogen and rare earth metals, superior oxidation resistance up to 1150°C and higher strength |
Notes:
SUS310S is not recommended for continuous use in conditions where heavy thermal shock occurs, due to its relatively high thermal expansion. The material exhibits good resistance to sigma phase embrittlement compared to higher-chromium grades, but prolonged exposure between 600-900°C can lead to some loss of ductility. Machining requires rigid setups, sharp tools, and adequate cooling due to work hardening. Welding by all common methods is possible, but filler metal matching AWS ER310 or similar should be used to maintain corrosion resistance. For cryogenic applications, the alloy retains good toughness down to -196°C.
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