Stainless Steel 316Ti (UNS S31635 / EN 1.4571) — Properties and Applications

Stainless steel 316Ti is a titanium-stabilised austenitic alloy derived from 316. It retains 316's corrosion resistance to acids and saltwater while using titanium to prevent intergranular corrosion - critical for high-heat or welded applications. This makes it ideal for industries needing thermal stability and corrosion protection.

 

Chemical Composition (Key, % ASTM A240) of Stainless Steel 316Ti

Element (wt%)	Value
C	≤ 0.08
Cr	16.0–18.0
Ni	10.0–14.0
Mo	2.0–3.0
Ti	≥ 5×(C+N), min 0.10 (no 0.70 maximum in A240)

Mechanical Properties (Annealed) of Stainless Steel 316Ti

Property	Value
Tensile strength	≥ 515 MPa
Yield strength	≥ 205 MPa
Elongation	≥ 40%
Hardness	≤ 217 HB

Physical Properties of Stainless Steel 316Ti

Condition: Solution‑annealed, typical values @20 °C

Property	Value
Density	7.90 g/cm³
Melting Range	1370‑1430 °C
Coefficient of Thermal Expansion (20‑100 °C)	16.0 ×10⁻⁶ /°C
Thermal Conductivity	15.1 W/(m·K)
Specific Heat Capacity	480 J/(kg·K)
Electrical Resistivity	0.75 μΩ·m
Elastic Modulus	193 GPa
Magnetic Response	Non‑magnetic (solution‑annealed); slight magnetism after cold working

 

Equivalent Grades of Stainless Steel 316Ti

Standard	Grade
UNS	S31635
EN / DIN	1.4571 (X6CrNiMoTi17‑12‑2)
ASTM	316Ti
JIS	SUS316Ti

 

Advantages of Stainless Steel 316Ti

1.Molybdenum addition improves resistance to chloride pitting & crevice corrosion, far better than 304.

2.Titanium stabilizes carbon, restricts chromium‑carbide precipitation; excellent resistance to intergranular corrosion. Welded assemblies can serve long‑term at 425‑850 °C without post‑weld solution annealing.

3.Higher nickel‑molybdenum content delivers superior creep‑rupture strength than 304 at 450‑750 °C.

4.Good thermal‑cycling performance, oxide scale is less prone to spalling.

5.Suitable for welded parts where post‑weld heat treatment is impractical on site.

Limitations: Not for long‑term full seawater immersion; avoid prolonged exposure 650‑900 °C to prevent sigma‑phase embrittlement. Max continuous service temperature approx 850 °C.

 

Applications of Stainless Steel 316Ti

1.Chemical & petrochemical: chloride‑containing process pipelines, heat exchangers, reaction vessel internals

2.High‑temperature exhaust system, boiler components, flue‑gas ducts

3.Welded equipment operating within 425‑850 °C with no possibility of post‑weld solution annealing

4.Coastal industrial facilities with salt‑spray exposure

5.Food & pharmaceutical equipment under moderate corrosive and elevated‑temperature conditions

Manufacturer of Stainless Steel 316Ti

GNEE supplies 316Ti (UNS S31635 / W.Nr.1.4571) titanium‑stabilized molybdenum‑bearing austenitic stainless steel. Our product range covers seamless & welded pipes, plates, coils, bars, flanges and pipe fittings, complying with ASTM A240, ASTM A312, EN 10088 and JIS standards

 

Value‑added services include cut‑to‑length, beveling, polishing and slitting. Free samples are offered, both small and bulk orders are acceptable. Export seaworthy packing with VCI anti‑rust paper, plastic end caps and fumigated wooden cases. Our products are exported to more than 60 countries worldwide. If you are sourcing reliable 316Ti stainless steel, contact GNEE for professional procurement solutions.

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FAQ

Why resist intergranular corrosion better than 316?

Titanium binds carbon before it forms chromium carbides (which deplete Cr and cause corrosion). This keeps Cr evenly distributed, even at 425–815°C, where 316 sensitizes. No post-weld annealing is needed, saving cost.

How is Ti content controlled?

ASTM requires 5×C to 0.70% Ti (min 0.10%). Too little Ti fails to bind carbon; too much reduces ductility. For 0.06% C, Ti needs at least 0.30% to balance corrosion resistance and workability.

Suitable for marine use?

Yes. Molybdenum resists chloride pitting (saltwater's main threat), and Ti prevents intergranular corrosion. It outperforms 304, avoiding rust/pitting and reducing maintenance.

Mechanical differences from 316?

Annealed properties are similar, but 316Ti retains strength better above 600°C. At 700°C, 316 loses 15–20% yield strength; 316Ti loses only 5–10%, ideal for high-heat parts.