Titanium Ti Grade 26-ANN (Annealed)
Heat-treated state · default condition
UNS R52404
Standard stocked condition: best formability, weldability and corrosion behaviour; use unless higher strength is needed.
Values for the ANN condition
Other Ti Grade 26 tempers and conditions
Ti Grade 26 is listed in 3 conditions; see the grade overview at Ti Grade 26.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
ANNDefaultThis page Annealed | Standard stocked condition: best formability, weldability and corrosion behaviour; use unless higher strength is needed. | 330 | 430 | 24 | 160 HB | — |
Grade 26H | Order when ASME Section VIII / B31.3 design stresses based on the higher 58 ksi UTS floor are required. | 345 | 460 | 22 | 168 HB | 3.1 % IACS |
Cold worked and stress relieved | Pick for drawn seamless tubing or bar where higher yield strength and tighter tolerances are wanted and forming is finished. | 520 | 600 | 15 | 16 HRC | 3 % IACS |
What is Ti Grade 26-ANN?
Ti Grade 26-ANN is Ti Grade 26 heat treated to ANN — standard stocked condition: best formability, weldability and corrosion behaviour; use unless higher strength is needed. Ti Grade 26-ANN has a yield strength of 330 MPa (47.9 ksi) and a tensile strength of 430 MPa (62.4 ksi) — weaker than 83% of titanium grades. Elongation at break is 24% and the elastic modulus is 105 GPa (15.2 Msi). Ti Grade 26-ANN has a density of 4.51 g/cm³ (0.163 lb/in³), heavier than 57% of titanium grades. It melts at 1,660°C (3,020 °F).
Advantages
- Readily welded — 90/100, better than 93% of titanium grades
- Forms and bends easily — 75/100, better than 83% of titanium grades
- Tough — resists crack growth — 80 MPa·√m (72.8 ksi·√in), better than 81% of titanium grades
- Easy to machine — 35/100, better than 78% of titanium grades
- Ductile — tolerates forming and impact — 24%, better than 77% of titanium grades
Limitations
- Low strength — 330 MPa (47.9 ksi), worse than 83% of titanium grades
Ti Grade 26-ANN properties
Typical room-temperature values for Ti Grade 26-ANN; 13 are specific to this condition. Other listed values are Ti Grade 26 reference data and may not represent this condition. Bars are the position among titanium grades.
Physical3
Ti Grade 26-ANN has a density of 4.51 g/cm³ (0.163 lb/in³), heavier than 57% of titanium grades. It melts at 1,660°C (3,020 °F).
Mechanical15
Ti Grade 26-ANN has a yield strength of 330 MPa (47.9 ksi) and a tensile strength of 430 MPa (62.4 ksi) — weaker than 83% of titanium grades. Elongation at break is 24% and the elastic modulus is 105 GPa (15.2 Msi).
Thermal6
Ti Grade 26-ANN is rated for continuous service to 300°C (572 °F). It conducts heat at 16.4 W/m·K (9.48 BTU/hr·ft·°F), better than 71% of titanium grades. Thermal expansion is 8.6 µm/m·K (4.78 µin/in·°F).
Electrical3
Ti Grade 26-ANN conducts electricity at 3.1 % IACS, better than 75% of titanium grades.
Chemical & Environmental3
Corrosion resistance is excellent (96/100), better than 92% of titanium grades.
Sustainability4
Producing a kilogram of Ti Grade 26-ANN takes about 650 MJ of energy and emits 40 kg of CO₂ — less than 75% of titanium grades. Typical recycled content is 25%.
Manufacturability8
Ti Grade 26-ANN's machinability is fair (35/100, better than 78% of titanium grades); weldability excellent (90/100); formability very good (75/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Ti Grade 26-ANN
Is Ti Grade 26 easy to machine?
Machine like Grade 2 CP Ti: low surface speed, heavy positive-rake sharp tooling, generous flood coolant, never dwell — work-hardening, galling and chip fire risk.
Can Ti Grade 26 be welded?
Excellent GTAW/PAW/EBW weldability with matching CP Ti or Gr26 filler; requires trailing shield and back purge to keep weld and HAZ below ~200 ppm oxygen pickup (bright silver bead).
Can Ti Grade 26 be formed, bent or molded?
Cold form with generous bend radii (2–3 t) and allow for springback; warm forming at 200–350 °C eases severe draws; avoid steel tooling contact that embeds iron.
What surface finishes work on Ti Grade 26?
Pickle in HNO₃/HF to remove alpha case and embedded iron; anodize (AMS 2488) for colour ID and anti-galling; polishes well but avoid chloride-bearing residues on hot surfaces.
Ti Grade 26 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Ruruthenium addition for crevice-corrosion resistance | 0.08 – 0.14 | 0.1 |
| Fe | ≤ 0.3 | 0.1 |
| Oprimary strengthener, controls strength level | ≤ 0.25 | 0.14 |
| C | ≤ 0.08 | 0.02 |
| N | ≤ 0.03 | 0.01 |
| H0.015 % max for sheet/plate; lower limits apply to some product forms | ≤ 0.02 | 0.01 |
| Other, eachresidual elements | ≤ 0.1 | — |
| Other, totalresidual elements total | ≤ 0.4 | — |
| Ti | balance | — |
Ti Grade 26-ANN — frequently asked
What is Ti Grade 26-ANN used for?
Ti Grade 26-ANN is typically used for chemical process equipment, desalination plant components, pulp bleaching equipment, shell-and-tube heat exchanger tubing, welded pressure vessel shells and liners and clad plate for reactors and columns. In short: ruthenium alternative to Grade 16; crevice-resistant Grade 2; excellent weldability.
What is the yield strength of Ti Grade 26-ANN?
Ti Grade 26-ANN has a typical yield strength of 330 MPa (47.9 ksi) and a tensile strength of 430 MPa (62.4 ksi) — weaker than 83% of titanium grades. Strength varies by condition: see the 3 listed tempers.
Is Ti Grade 26-ANN easy to machine?
Not especially — machinability is rated fair (35/100, better than 78% of titanium grades). Machine like Grade 2 CP Ti: low surface speed, heavy positive-rake sharp tooling, generous flood coolant, never dwell — work-hardening, galling and chip fire risk.
Can Ti Grade 26-ANN be welded?
Yes — weldability is rated excellent (90/100). Excellent GTAW/PAW/EBW weldability with matching CP Ti or Gr26 filler; requires trailing shield and back purge to keep weld and HAZ below ~200 ppm oxygen pickup (bright silver bead).
What surface finishes work on Ti Grade 26-ANN?
Pickle in HNO₃/HF to remove alpha case and embedded iron; anodize (AMS 2488) for colour ID and anti-galling; polishes well but avoid chloride-bearing residues on hot surfaces.
Can Ti Grade 26-ANN be formed, bent or molded?
Cold form with generous bend radii (2–3 t) and allow for springback; warm forming at 200–350 °C eases severe draws; avoid steel tooling contact that embeds iron.
What is the maximum service temperature of Ti Grade 26-ANN?
Ti Grade 26-ANN is rated for continuous use to about 300°C (572 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Ti Grade 26-ANN and Ti Grade 26 CWSR?
ANN is the default condition — standard stocked condition: best formability, weldability and corrosion behaviour; use unless higher strength is needed. CWSR: pick for drawn seamless tubing or bar where higher yield strength and tighter tolerances are wanted and forming is finished. Yield strength is 330 MPa in ANN versus 520 MPa in CWSR.
Sources
- ASTM B265 — Titanium and Titanium Alloy Strip, Sheet and Plate — ASTM International (2020)
- ASTM B348 — Titanium and Titanium Alloy Bars and Billets — ASTM International (2021)
- ASTM B338 / B861 / B862 — Titanium Tube and Pipe — ASTM International (2022)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials (Titanium) — ASM International (2005)
- Corrosion-resistant titanium grades (Ru- and Pd-enhanced) technical data — Titanium mill producer literature (2020)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.