310S Stainless Steel (EN 1.4845) is a high-chromium, high-nickel austenitic grade designed for excellent oxidation and corrosion resistance at elevated temperatures, making it ideal for chemical, petrochemical, and high-temperature process environments.
310S Stainless Steel (AISI 310S / ASTM A240 Type 310S)
High-Temperature Resistance: High Cr (24–26%) and Ni (19–22%) content provide outstanding oxidation resistance in continuous service up to ~1100 °C.
Excellent Corrosion Resistance: Good resistance to oxidation and carburization; performs well in mildly corrosive atmospheres and at high temperatures.
Good Fabricability and Weldability: Can be welded without post-weld heat treatment, though care is needed to avoid hot cracking.
310S Stainless Steel Equivalent Grades
| Standard | UNS | EN | DIN | JIS | GB |
| Grade | S31008 | 1.4845 | X15CrNiSi25-20 | SUS310S | 0Cr25Ni20Si |
Typical Chemical Composition (wt %)
| Element | C≤ | Cr | Ni | Si | Mn≤ | P≤ | S≤ |
| 310S | 0.08 | 24–26 | 19–22 | 0.75–1.5 | 2 | 0.045 | 0.03 |
Mechanical Properties (ASTM A240, Room Temp.)
| Property | Value |
| Tensile Strength (UTS) | ≥ 515 MPa |
| Yield Strength (0.2%) | ≥ 205 MPa |
| Elongation (50 mm) | ≥ 40 % |
| Brinell Hardness | ≤ 217 |
Typical Applications
- Furnace components, heat exchangers, and kiln linings
- Boiler and combustion equipment
- Chemical and petrochemical vessels at high temperatures
- Food and pharmaceutical equipment exposed to heat
- Flue-gas desulfurization units and exhaust systems
Common Product Forms
- Hot-/cold-rolled sheet and coil
- Seamless & welded pipe, fittings (elbows, tees, reducers)
- Bar, forgings, shafts
- Weld neck, slip-on, blind flanges
- Fasteners (bolts, nuts)
- Welding wire & electrodes
310S VS 316L VS 316Ti
310S vs 316L / 316Ti:
310S has much higher Cr and Ni, giving it excellent oxidation resistance at very high temperatures (up to 1100 °C), but lower resistance to chloride stress corrosion cracking compared to 316L/Ti.
316L vs 316Ti:
316Ti contains Ti (~0.5%) to stabilize carbon and prevent intergranular corrosion in welds or prolonged high-temp service (400–550 °C).
316L has very low carbon to minimize carbide precipitation, suitable for most moderate-temperature applications.
316L / 316Ti vs 310S:
316 variants are better for corrosive chemical and chloride environments, while 310S is for high-temperature oxidation and furnace service.
310S Stainless Steel vs High-Temperature Alloys
| Material | Continuous Service Temp | Short-Term Max Temp | Creep/High-Temp Strength | Typical Applications |
| 310S | ≤ 1100 °C | ~1150 °C | Moderate | High-temperature furnaces, boilers, heat exchangers |
| Inconel 600 | 650–700 °C | >800 °C | Good | Aerospace, furnace tubes, oxidation-resistant environments |
| Inconel 625 | 650–700 °C | >800 °C | Excellent | Seawater pumps, acid vessels, chemical equipment |
| Hastelloy C-276 | 600–650 °C | 700 °C | Good | Strong acids, chloride-rich environments |
| Alloy 800H/HT | 800–900 °C | 1000 °C | Outstanding | Petrochemical heaters, heat treatment furnaces |
310S performs well under continuous high temperatures in oxidizing environments but has much lower creep strength and corrosion resistance than Ni-based or Fe–Ni high-temperature alloys.
High-temperature alloys offer higher strength, superior corrosion resistance, and long-term stability under mechanical and chemical loads, whereas 310S is mainly suitable for oxidizing or mildly corrosive conditions.
FAQs – 310S stainless steel
310S is a low-carbon version of 310 (C ≤ 0.08%), which reduces the risk of carbide precipitation and improves resistance to intergranular corrosion during welding or prolonged high-temperature service.
Yes, 310S has excellent oxidation resistance and can be used in continuous service up to ~1100 °C in oxidizing atmospheres.
Generally no—only stress-relief heat treatment is applied when specifically required by service conditions.
Continuous service up to ~1100 °C; short-term peaks can reach ~1150 °C. For long-term structural or pressure applications, service temperatures are typically limited to below ~1000 °C to avoid creep.
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