SS316Ti Tube Sheet
Combines 316's molybdenum-based chloride resistance with 321's titanium stabilization — the specification for welded service that runs both moderately corrosive and elevated in temperature at the same time.
Chemical Composition
| Element | Min % | Max % |
|---|---|---|
| Chromium (Cr) | 16.0 | 18.0 |
| Nickel (Ni) | 10.5 | 13.5 |
| Molybdenum (Mo) | 2.0 | 3.0 |
| Titanium (Ti) | 5×%C min | 0.70 |
| Carbon (C) | — | 0.08 |
Mechanical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength | 540 MPa min |
| Yield Strength (0.2% offset) | 240 MPa min |
| Elongation | 35% min |
| Max. Practical Service Temp. | ~850°C (oxidation-limited) |
Equivalent Grades
| Standard | Designation |
|---|---|
| ASTM / UNS | S31635 |
| EN / DIN | 1.4571 |
| JIS | SUS316Ti (reference) |
Why Both, At Once
Applications
European-market chemical processing and pharmaceutical equipment operating at elevated temperature with moderate chloride exposure, where EN-standard specifications commonly default to 316Ti over plain 316L.
Advantages & Limitations
Advantages
- Combines chloride resistance and high-temp stabilization
- Well-established in EN-standard specifications
- No PWHT required for most welded applications
Limitations
- Cost premium over plain 316/316L
- Less commonly stocked outside EN-standard markets
- Overkill if only one of the two properties (chloride OR temperature) is actually needed
FAQ
Not exactly — 316Ti's carbon content is closer to standard 316 than to 316L, since the titanium stabilization itself addresses the sensitization risk that 316L's low carbon otherwise solves. The two approaches (stabilization vs. low carbon) are alternative solutions to the same underlying problem.
If service temperature stays below the sensitization range (roughly under 425°C), 316L is simpler and typically more available. 316Ti earns its place specifically when elevated temperature is a genuine part of the service profile.
Yes — 316Ti with EN 10088/1.4571 documentation is available for EU-bound orders. Confirm your specific PED or CE marking requirement at enquiry stage.