Titanium-Stabilized Molybdenum Austenitic Stainless for Welded High-Temp Service
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UNS NUMBER
S31635
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ALLOY FAMILY
Austenitic (Mo, Ti-stabilized)
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STRUCTURE
100% Austenite
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UTS (MIN)
≥515 MPa
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MAX TEMP
~870°C
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DENSITY
8.00 g/cm³
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Stainless Steel 316Ti (UNS S31635) is 316 stabilized with titanium (≥ 5× the carbon-plus-nitrogen content). The titanium ties up carbon as TiC so the steel resists intergranular sensitization after welding — the European / CIS preference where 316L is less common. EN equivalent is 1.4571 (X6CrNiMoTi17-12-2).
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Cr
16–18%
Oxidation resistance
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Ni
10–14%
Austenite stabilizer
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Mo
2–3%
Pitting / crevice resistance
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Ti
5×(C+N) min
Stabilizer, ties up carbon
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UTS
≥515 MPa
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YS 0.2%
≥205 MPa
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Elong.
≥40%
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Service
-196~870°C
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What is Stainless Steel 316Ti?
316Ti is the titanium-stabilized answer to the same need 316L meets by lowering carbon: instead of removing carbon, it adds enough titanium (minimum 5×(C+N), max 0.70%) to preferentially form TiC, leaving chromium in solution and preventing sensitization during and after welding. It is the dominant stabilized 316 grade in Europe and the CIS (GOST 08Х17Н13М2Т).
Because the carbon can stay at the 316 level (up to 0.08%), 316Ti keeps the full 316 strength floor and adds weld-sensitization immunity. The trade-off is that titanium can reduce high-temperature creep ductility compared with niobium-stabilized 347, and titanium-stabilized welds need controlled heat input. Where the priority is high-temperature creep, 347H is often preferred; where European specs dominate, 316Ti is the natural choice.
Chemical Composition (Weight %)
| Element |
Min (%) |
Max (%) |
Role in Alloy |
| Chromium (Cr) |
16.0 |
18.0 |
Oxidation resistance |
| Nickel (Ni) |
10.0 |
14.0 |
Austenite stabilizer |
| Molybdenum (Mo) |
2.0 |
3.0 |
Pitting / crevice resistance |
| Titanium (Ti) |
5×(C+N) min |
0.70 max |
Stabilizer; forms TiC |
| Carbon (C) |
— |
0.08 |
At 316 level |
| Manganese (Mn) |
— |
2.00 |
Deoxidizer |
| Silicon (Si) |
— |
1.00 |
Deoxidizer |
| Phosphorus (P) |
— |
0.045 |
Impurity |
| Sulfur (S) |
— |
0.030 |
Impurity |
| Iron (Fe) |
Balance |
— |
Matrix former |
★ Titanium ≥ 5×(C+N), maximum 0.70%, is the stabilizing element that prevents chromium-carbide sensitization after welding. EN 1.4571 / GOST 08Х17Н13М2Т are the common equivalents.
Mechanical Properties
Values are for the solution-annealed condition per ASTM A240, A182 (F316Ti), and A312 (TP316Ti).
| Condition / Form |
UTS (MPa) |
YS 0.2% (MPa) |
Elong. % (min) |
Hardness (max) |
| Minimum (ASTM A240 / A182 F316Ti) |
≥515 |
≥205 |
40 |
217 HBW (95 HRB) |
| Typical mill-annealed |
515–700 |
205–340 |
45–55 |
150–200 HBW |
Modulus of Elasticity 193 GPa. Titanium stabilization avoids sensitization but can slightly reduce elevated-temperature creep ductility versus niobium-stabilized 347. Match filler ER316Ti.
Physical Properties
| Property |
Value |
Note |
| Density |
8.00 g/cm³ |
Slightly above 316L |
| Melting Range |
1375–1400°C |
Solidus ~1375°C |
| Thermal Conductivity (100°C) |
16.3 W/m·K |
Comparable to austenitics |
| Thermal Expansion (20–100°C) |
16.0 ×10⁻⁶ /K |
Higher than carbon steel |
| Specific Heat |
500 J/kg·K |
At 21°C |
| Electrical Resistivity |
0.74 µΩ·m |
At 21°C |
| Magnetic Property |
Non-magnetic* |
*Slight after cold work |
| PREN (Pitting Resistance) |
~26 |
PREN = %Cr + 3.3×%Mo + 16×%N |
Corrosion Resistance
Weld Sensitization Immunity
The titanium ties up carbon as TiC, so 316Ti does not sensitize in the 425–815°C range after welding. It is chosen where post-weld annealing is impractical and 316L is not specified.
Pitting & Crevice Corrosion
Same 2–3% molybdenum as 316 gives PREN ~26 — good chloride resistance at ambient temperature, but it still pits in warm/stagnant seawater like 316.
European / CIS Preference
316Ti (EN 1.4571) is the historical stabilized 316 in European and Russian/CIS codes, where 316L was less common. Many legacy specs call out 316Ti by default.
High-Temperature Creep
Titanium stabilization is acceptable to ~870°C but offers less creep ductility than niobium-stabilized 347. For the highest creep duty, 347H is often preferred.
Stainless Steel 316Ti vs Similar Grades — Selection Guide
| If you need... |
Choose... |
Why |
| Welded 316, no PWHT (EU/CIS) |
316Ti |
Ti stabilization, EN 1.4571 |
| Welded 316, lowest cost |
316L |
Low-carbon route |
| High-temp creep >650°C |
347H |
Nb stabilization, better creep |
| Warm seawater / aggressive Cl⁻ |
904L / 254SMO |
PREN 36–45 |
Applicable Standards
| Standard |
Product Form |
| ASTM A240 |
Plate, sheet, strip |
| ASTM A182 F316Ti |
Forged flanges & fittings |
| ASTM A312 TP316Ti |
Seamless & welded pipe |
| ASTM A403 WP316Ti |
Butt-weld fittings |
| ASTM A276 / A479 |
Bar, rod, forging stock |
| EN 1.4571 / GOST 08Х17Н13М2Т |
European / CIS equiv. |
HT PIPE Supply — Stainless Steel 316Ti Product Forms
| Product Form |
Specifications |
HT PIPE Supply |
| Seamless Pipe |
ASTM A312 TP316Ti |
✅ Available |
| Forged Flanges |
ASTM A182 F316Ti, ASME B16.5 |
✅ In stock |
| Butt-Weld Fittings |
ASTM A403 WP316Ti |
✅ Available |
| Plate / Sheet |
ASTM A240 |
✅ Available |
| Bar / Rod |
ASTM A276 / A479 |
✅ Available |
| Welded Pipe |
ASTM A312 TP316Ti |
✅ Available |
HT PIPE supplies 316Ti (EN 1.4571) in pipe, flanges, fittings, plate, and bar for European and CIS projects, with MTRs and matching ER316Ti welding consumables.
Project Experience — Stainless Steel 316Ti
HT PIPE supplies 316Ti for European and CIS process, chemical, and welded high-temperature systems.
| Project |
Product |
Specification |
| European Chemical Plant (EU) |
316Ti Pipe + Fittings |
A312, A403 |
| CIS Refinery Piping (Russia) |
316Ti Flanges + Forgings |
A182 F316Ti, GOST |
| Food & Dairy Process (Europe) |
316Ti Plate + Tube |
A240, A269 |
We advise 316Ti vs 316L selection and supply matching ER316Ti filler for stabilized welds.
| FREQUENTLY ASKED QUESTIONS |
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FAQ — Stainless Steel 316Ti
| What is the difference between 316Ti and 316L? |
| Both avoid weld sensitization, but by different routes: 316L removes carbon (≤0.030%); 316Ti keeps 316-level carbon and adds titanium (≥5×(C+N)) to stabilize it. 316Ti keeps the full 316 strength and is the European/CIS convention. |
| Is 316Ti the same as 1.4571? |
| Yes. EN 1.4571 (X6CrNiMoTi17-12-2) is the European designation of 316Ti, and GOST 08Х17Н13М2Т is the Russian equivalent. |
| What filler is used for 316Ti? |
| ER316Ti / E316Ti to preserve stabilization. Using plain 316L filler is acceptable for strength but loses the titanium-stabilized weld concept. |
| Can 316Ti be used at high temperature? |
| Up to about 870°C for oxidation, but its creep ductility is lower than niobium-stabilized 347. For the highest creep duty, 347H is usually preferred. |
| Is 316Ti good in seawater? |
| Like 316, PREN ~26 makes it adequate at ambient temperature with flow but prone to pitting in warm/stagnant seawater. Use 904L or 254SMO for aggressive chloride. |
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Need Stainless Steel 316Ti for Your Project?
HT PIPE supplies 316Ti (UNS S31635 / EN 1.4571) pipe, flanges, fittings, plate, and bar with full MTR documentation and matching welding consumables. Contact our technical team for advice.
Request a Quote |
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