SS310 Tube Sheet
The highest chromium and nickel content in the standard stainless family gives 310 the best oxidation resistance of any austenitic grade — the reach before moving to Inconel or Incoloy for extreme continuous high-temperature exposure.
Chemical Composition
| Element | Min % | Max % |
|---|---|---|
| Chromium (Cr) | 24.0 | 26.0 |
| Nickel (Ni) | 19.0 | 22.0 |
| Silicon (Si) | — | 1.50 |
| Carbon (C) | — | 0.25 |
Mechanical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength | 515 MPa min |
| Yield Strength (0.2% offset) | 205 MPa min |
| Elongation | 40% min |
| Continuous Oxidation Resistance | ~1035-1150°C |
Equivalent Grades
| Standard | Designation |
|---|---|
| ASTM / UNS | S31000 |
| EN / DIN | 1.4841 |
| JIS | SUS310S (low-carbon variant) |
A Necessary Caveat on Temperature Numbers
Available Product Forms
SS310 is most often specified as a U-Tube Tube Sheet for furnace, kiln-adjacent, and high-temperature process gas equipment.
Applications
Furnace components, heat-treating equipment, and high-temperature process gas heat exchangers where extreme oxidation resistance is the primary driver rather than pressure-boundary strength at temperature.
Advantages & Limitations
Advantages
- Best oxidation resistance in the standard stainless family
- Good resistance to carburizing and sulfur-bearing atmospheres
- Lower cost than nickel alloys for equivalent oxidation duty
Limitations
- Allowable stress at high temperature is limited despite oxidation resistance
- No chloride advantage — still no molybdenum
- 310S (lower carbon) generally preferred for welded applications
FAQ
310S, with its lower carbon content, is generally preferred for welded applications for the same sensitization-avoidance reason 304L is preferred over 304. See the SS310S datasheet for the low-carbon variant.
Only within limits — 310 handles oxidation well but has lower allowable stress at extreme temperature and less resistance to certain aggressive atmospheres than Inconel. It's a cost-effective step below Inconel, not a full substitute for the most demanding services.
310 is typically sourced to order given its specialist high-temperature demand profile — send your specification and quantity for a confirmed lead time.