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| Grade | Code | AISI | Austenitic Stainless Steel |
| 1.4571 | X6CrNiMoTi17-12-2 | 316Ti |
1.4571 is a titanium-stabilized austenitic Cr-Ni-Mo stainless steel. AISI 316Ti provides good corrosion resistance in atmospheric conditions and in many natural and industrial waters. Its molybdenum content improves resistance to pitting and crevice corrosion in chloride-bearing environments compared with standard Cr-Ni stainless steels. Titanium stabilization reduces the risk of chromium carbide precipitation at grain boundaries during welding or elevated-temperature exposure, helping maintain resistance to intergranular corrosion. This makes 316Ti particularly suitable for welded and elevated-temperature applications.
| C % | Si % | Mn % | P % | S % | Cr % | Ni % | Mo % | Ti % | Fe % |
| ≤ 0.08 | ≤ 1.00 | ≤ 2.00 | ≤ 0.045 | ≤ 0.03 | 16.50–18.50 | 10.50–13.50 | 2.00–2.50 | ≥ 5×C, ≤ 0.70 | Bal. |
*Values are based on EN 10088-3.
| Product Form | Rp0.2 (MPa) | Rm (MPa) | A (%) | Hardness | Density |
| Bar | ≥210 | 515–700 | ≥40 | ≤215 HB | 8.00 |
| Plate | ≥220 | 520–670 | ≥40 | — | 8.00 |
| Cold-Rolled Sheet | ≥240 | 540–690 | ≥40 | ≤210 HB | 8.00 |
| Tube / Pipe | ≥220 | 510–710 | ≥35 | ≈155 HV | 8.00 |
| Industry | Common Products |
| Chemical & Process Industry | Heat exchangers, process piping, pressure vessels / reactors |
| Petrochemical & Oil & Gas | Process piping and fittings, valve/pump components, heat exchangers |
| Fertilizer Industry | Process piping systems, pressure vessels, valve and pump parts |
| Pulp & Paper | Heat exchangers and condensers, process piping, chemical process tanks |
| Power Generation | Condensers, heat exchangers, high-temperature piping/duct components |
| Chimney & Flue Gas Systems | Industrial chimneys, flue gas ducts, high-temperature connections and expansion components |
| Pharmaceutical | Process piping systems, process tanks, valve and pump components |
| Food & Beverage | Process tanks, hygienic piping and fittings, heat exchangers |
AISI 316Ti is notable for retaining mechanical strength at elevated temperatures better than standard 316 grades. Titanium stabilization helps reduce susceptibility to intergranular corrosion caused by chromium carbide precipitation after prolonged exposure within the 450–850°C sensitization range. This makes 316Ti a useful option for welded fabrications and service conditions involving elevated temperatures. However, 316Ti is not inherently superior to 316L in every application; grade selection should be based on operating temperature, corrosive environment and service conditions.
AISI 316Ti, 1.4571, X6CrNiMoTi17-12-2, UNS S31635
| Product Form | ASTM Specification |
| Round Bar | ASTM A276 / ASTM A479 |
| Plate | ASTM A240 |
| Sheet | ASTM A240 |
| Pipe | ASTM A312 – TP316Ti |
| Seamless Tube | ASTM A213 – TP316Ti |
| General Service Tube | ASTM A269 – TP316Ti |
| Grade | Why Consider It? |
| AISI 316/316L – 1.4401 / 1.4404 | Offers a similar Cr-Ni-Mo alloy concept and corrosion behavior. If Ti stabilization is not required for sustained elevated-temperature service, 316L should generally be the first grade considered. |
| AISI 317 | Its higher alloy content than the 316 family makes it a logical step-up option when greater corrosion resistance is required. |
| 904L – 1.4539 / UNS N08904 | With substantially higher Ni and Mo contents, this austenitic grade can be considered above 316Ti for more severe corrosive process conditions. |
Outokumpu – Supra 316Ti / 4571
Acerinox – ACX 280 / AISI 316Ti
Note: The information contained in this datasheet is for informational purposes only; no liability is accepted.
