316Ti Stainless Steel (UNS S31635)
Austenitic (Ti-stabilized) · ASTM A240/A240M, EN 10088-2 · Density 8 g/cm³
316Ti (UNS S31635, EN 1.4571) is titanium-stabilized 316 stainless steel. Titanium ties up carbon so the alloy resists intergranular corrosion after welding or prolonged service at 425–815 °C, combining the molybdenum-bearing corrosion resistance of 316 with high-temperature stability. It is the default molybdenum grade in many European specifications.
Quotation brief
Quote 316Ti When
Quote 316Ti when a molybdenum-bearing austenitic grade must retain resistance to sensitization during prolonged elevated-temperature exposure and the governing material specification explicitly requires titanium stabilization. It is not an automatic upgrade from 316L: polished hygienic surfaces, low-temperature toughness, weld procedure, product form and the applicable design code can favor a low-carbon grade instead.
Best fit
- European process-equipment drawings that explicitly call for EN 1.4571 or a titanium-stabilized molybdenum grade.
- Welded components exposed for extended periods within the sensitization range where stabilization is part of the approved material strategy.
- Heat-exchanger, expansion-joint and chemical-process parts that need 316-family corrosion behavior with elevated-temperature stability.
Limits to check
- The titanium addition does not make 316Ti a furnace alloy; oxidation service at higher temperatures requires a heat-resisting grade and code review.
- Titanium-bearing inclusions can affect very fine polished or hygienic surfaces, so finish acceptance and cleaning requirements must be agreed before ordering.
- 316Ti, 316L and EN 1.4571 are not interchangeable labels unless chemistry, mechanical properties, product standard and project approval all align.
Quoted product forms
Quoted product forms for 316Ti Stainless Steel (UNS S31635)
We quote 316Ti Stainless Steel as sheet / plate, coil / strip, pipe / tube, bar against the named product standard.
- Traceability: heat or lot identity plus the inspection document named in the RFQ (EN 10204 3.1 when that route supports it).
- Processing: decoiling, cutting, polishing, shearing and beveling as ordered.
- Next step: send product form, size and quantity; we quote the supply route.
Chemical Composition (wt%)
| C | Mn | Si | Cr | Ni | Mo | Ti | N | P | S |
|---|---|---|---|---|---|---|---|---|---|
| ≤0.08 | ≤2.00 | ≤0.75 | 16.0–18.0 | 10.0–14.0 | 2.00–3.00 | 5×(C+N)–0.70 | ≤0.10 | ≤0.045 | ≤0.030 |
Single values are maximums unless a range is shown. Balance: Fe. Per ASTM A240/A240M, EN 10088-2.
Mechanical Properties
| Tensile strength | ≥515 MPa (75 ksi) |
|---|---|
| Yield strength (0.2%) | ≥205 MPa (30 ksi) |
| Elongation (50 mm) | ≥40% |
| Hardness | ≤217 HBW |
Room-temperature minimum values are summarized for annealed flat product under ASTM A240/A240M, EN 10088-2 unless a condition is named in the property label; product form and thickness can change the requirement.
Physical Properties & Structure
| Density | 8 g/cm³ |
|---|---|
| Magnetic response | Essentially non-magnetic after solution annealing; cold work can introduce a measurable magnetic response. |
| Microstructure | Austenitic (Ti-stabilized) |
Corrosion Resistance & Limits
- General corrosion resistance comes from the chromium-rich passive film; nickel, molybdenum, nitrogen and copper change performance by grade.
- Check chlorides, temperature, crevices, deposits, process chemistry and cleaning conditions. A grade designation alone is not a service-life guarantee.
Fabrication & Heat Treatment
| Welding | Generally weldable with a qualified procedure and matching or over-alloyed filler where required; remove heat tint when corrosion service demands it. |
|---|---|
| Forming | Good ductility is typical, but rapid work hardening increases forming load and springback; bend radius and intermediate annealing depend on grade and reduction. |
| Machining | Use rigid tooling, positive feeds and controlled heat because the material work-hardens; free-machining grades require separate corrosion and welding review. |
| Heat treatment | Solution annealing and rapid cooling restore the intended condition where applicable. Austenitic grades are not hardened by conventional quench-and-temper treatment. |
Equivalent Grades
The closest international equivalents of 316Ti Stainless Steel are 1.4571 (X6CrNiMoTi17-12-2) in the EN system, SUS316Ti in the JIS system, 06Cr17Ni12Mo2Ti in the GB system.
These are common corresponding designations, not unconditional substitutes. Verify chemistry, mechanical properties, product standard, delivery condition, dimensions and project approval before changing designation.
| System | Designation |
|---|---|
| UNS | S31635 |
| EN | 1.4571 (X6CrNiMoTi17-12-2) |
| JIS | SUS316Ti |
| GB | 06Cr17Ni12Mo2Ti |
Ordering Checks for 316Ti
- State the exact product standard and designation, including UNS S31635 or EN 1.4571, instead of requesting generic stabilized 316.
- Provide product form, dimensions, delivery condition, finish and any pressure-equipment or project-specific supplementary requirements.
- Define design and operating temperature, exposure duration and corrosion medium so the stabilized-grade rationale can be reviewed.
- Request the required inspection certificate and confirm titanium stabilization, heat number and ordered designation on the material certificate.
Reference Product Forms & Dimensional Ranges
Common reference product forms for 316ti stainless steel: Sheet / Plate, Coil / Strip, Pipe / Tube, Bar.
| Finishes | No.1, 2B, BA |
|---|---|
| Sheet / coil thickness | 0.5–6.0 mm |
| Plate thickness | 6–60 mm |
Common surface and delivery options
- No.1, 2B, BA or mechanically polished finish when supported by the product route
- Annealed and pickled, descaled or polished tube finish as specified
- Hot rolled, peeled, bright drawn, ground or polished bar condition according to tolerance
These published ranges are engineering references, not a live-stock or production-capability promise. Send the required product form, dimensions, condition and finish; we quote the matching supply route.
Browse related product hubs:Sheet & plate,Coil & strip,Pipe & tube,Bar & rod.
Typical Applications
- Chemical plant operating at elevated temperature
- Exhaust bellows and expansion joints
- Condensers and heat exchangers
- Pressure vessels to European codes
- Pharmaceutical and process piping
Frequently Asked Questions
What is the difference between 316Ti and 316L?
Both fight sensitization, by different routes: 316L simply lowers carbon, while 316Ti binds carbon with titanium. 316Ti keeps slightly higher strength at elevated temperature and stays stable in long service at 425–815 °C; 316L is cleaner-surfaced (no titanium inclusions) and better for polished or deep-drawn parts.
Why do European specifications often call for 1.4571?
Historically German chemical industry standards adopted the titanium-stabilized grade before low-carbon steelmaking became cheap, and 1.4571 remains embedded in DIN/EN equipment specs. Functionally, dual-certified 316/316L satisfies most of the same duties, but when a drawing says 1.4571 the stabilized grade must be supplied.
Is 316Ti better than 316 for high temperature?
Yes, within the sensitization window. Between roughly 425 and 815 °C unstabilized 316 can precipitate chromium carbides and lose grain-boundary corrosion resistance, while titanium-stabilized 316Ti stays resistant. For continuous oxidation service above ~870 °C, move to a heat-resisting grade such as 309S/310S instead.
Published by Tsingshan (Shandong) Iron & Steel Co., Ltd..Sources, update policy and technical limitations.
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