Data completeness: partial. Last verified 19 August 2026.
Designations
| Common name | 316Ti |
| UNS | S31635 |
| EN number | 1.4571 |
| Class | Austenitic stainless steel |
| Specified by | ASTM A240/A240M, EN 10088-2 |
316Ti solves the same problem as 316L by the opposite route. Instead of removing the carbon, it adds titanium, which grabs the carbon first and forms titanium carbides, leaving the chromium in solution where it is useful. The practical consequence is that 316Ti keeps its stabilisation at temperature, where 316L only avoids the problem on the way through — which is why the titanium grades survive in the creep range and the L grades are not specified there.
Properties, with what each one rests on
| Property | Value | Unit | Condition | Evidence | Source | Retrieved |
|---|---|---|---|---|---|---|
| Proof strength Rp0.2, minimum (EN) | 240 | MPa | cold rolled coil and sheet, 20 °C | E3 | EN 10088-2 via Outokumpu Supra range datasheet — molybdenum-alloyed austenitic stainless steels | 2026-08-20 |
| Tensile strength Rm, minimum | 540 | MPa | cold rolled; datasheet gives a 540–690 range | E3 | EN 10088-2 via Outokumpu Supra range datasheet — molybdenum-alloyed austenitic stainless steels | 2026-08-20 |
| Elongation A, minimum | 40 | % | cold rolled; A and A80 both 40 | E3 | EN 10088-2 via Outokumpu Supra range datasheet — molybdenum-alloyed austenitic stainless steels | 2026-08-20 |
| PREN | 24 | — | from typical composition, not from a heat | E3 | Outokumpu Supra range datasheet — molybdenum-alloyed austenitic stainless steels | 2026-08-20 |
| Density | 8.0 | g/cm³ | 20 °C | E3 | Outokumpu Supra range datasheet — molybdenum-alloyed austenitic stainless steels | 2026-08-20 |
| Modulus of elasticity | 200 | GPa | 20 °C | E3 | Outokumpu Supra range datasheet — molybdenum-alloyed austenitic stainless steels | 2026-08-20 |
| Thermal conductivity | 15 | W/(m·K) | 20 °C | E3 | Outokumpu Supra range datasheet — molybdenum-alloyed austenitic stainless steels | 2026-08-20 |
| Titanium content and the Ti:C ratio required for stabilisation | not established | — | — | — | the ratio is set by the standard, which is paywalled; the datasheet lists titanium only as present | — |
| Elevated temperature strength | not established | — | — | — | the datasheet consulted carries no elevated temperature table for this grade | — |
| Composition limits | not established | — | — | — | ASTM A240 is paywalled; the datasheet gives typical values, which are not limits | — |
7 sourced values, 3 gaps named. Publishing the gaps is more useful than filling them from an aggregator that does not say where its numbers came from. The routes to filling them are the standard itself, a mill datasheet, or a mill certificate for your actual heat — which supersedes both at E5.
Where the numbers come from
PREN. 16.8% Cr and 2.1% Mo in the datasheet’s own formula give 23.7, printed as 24. Titanium does not appear in the formula, so stabilisation buys nothing in pitting terms.
Why we do not just copy an aggregator. Because then this page would be a worse copy of MatWeb with no way for you to tell which rows to trust, and the one thing we have that MatWeb does not is the evidence column. Our coverage and its limits.
What 316Ti is usually chosen for
Service where the part sits in the sensitisation range long enough that low carbon alone will not save it — exhaust and flue components, jacketed vessels, anything cycling through the mid hundreds of degrees. It is also the grade written into a lot of older European drawings, and requalifying those to 316L is often more work than buying 316Ti.
And what it is usually rejected for
Surface finish and cleanliness. Titanium carbides and nitrides are hard inclusions; they show up as streaks on polished surfaces and they are unwelcome in high-purity and food-contact work, where 316L is the default for exactly that reason. It is also less widely stocked than 316L in most product forms, which turns a small specification decision into a lead-time conversation.
The number to be more careful with than any of the above is the difference between a specified minimum and a typical value — a floor the standard guarantees, versus what a supplier’s production usually does. The full version, and the most expensive routine mistake in material data.
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What this page does not cover
- The titanium content and the stabilisation ratio are not established here, and they are what make the grade what it is.
- No elevated temperature values, which is the service the grade exists for.
- The ASTM plate minima are not established here.
- Fatigue, fracture toughness and chloride stress corrosion cracking.
- Weld filler selection for stabilised grades, which differs from 316L.
Generated from data/materials/316ti.yaml. Regenerate rather than editing this file by hand — edits here are lost on the next build.