Titanium Ti Grade 25
UNS R56403
Ti Grade 25 (UNS R56403) is a Ti-6Al-4V variant with nickel and palladium additions, supplied to ASTM B265/B348, that keeps Grade 5-level strength while improving resistance to crevice attack in hot chloride environments.
Reference datasheet — Ti Grade 25 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the Annealed condition
Ti Grade 25 tempers and conditions
Ti Grade 25 is supplied in 4 conditions, soft to hard. Annealed is the default FabDigit quotes; the values on this page are for it.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
above beta transus anneal, slow cooled | Pick when fracture toughness and damage tolerance in thick sections matter more than ductility or fatigue life. | 860 | 940 | 10 | 34 HRC | 1 % IACS |
AnnealedDefault mill annealed (ASTM B265/B348 Grade 25) | Standard stock condition for plate, sheet, bar and pipe; best combination of ductility, weldability and corrosion resistance. | 880 | 950 | 14 | 35 HRC | — |
GTAW weld metal / HAZ, unstress-relieved | Property set for autogenous or matching-filler GTAW joints before post-weld stress relief; ductility drops appreciably. | 890 | 960 | 7 | 37 HRC | 1 % IACS |
Solution treated and aged | Choose for maximum strength in thin sections (downhole tubulars, fasteners); slightly lower toughness and ductility than annealed. | 1,010 | 1,100 | 10 | 39 HRC | — |
Supply forms, finishes and certifications
Ways Ti Grade 25 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
Hot Worked | Hot Worked / As-forged | Surface finish |
What is Ti Grade 25?
Ti Grade 25 (UNS R56403) is a Ti-6Al-4V variant with nickel and palladium additions, supplied to ASTM B265/B348, that keeps Grade 5-level strength while improving resistance to crevice attack in hot chloride environments. It is specified for high-strength parts in seawater and downhole service, with default annealed/STA properties of 880 MPa yield, 950 MPa tensile, 14% elongation and 330 HB (35 HRC), and service to 400 °C in bar, plate, sheet and forgings. Machinability is low (score 20) and cold formability limited (score 25, bend radii 4–5t), and the alloy addition raises cost — use plain Grade 5 where crevice corrosion is not a concern, or Grade 29 where toughness governs. Ti Grade 25 has a density of 4.43 g/cm³ (0.16 lb/in³), lighter than 89% of titanium grades. It melts at 1,604°C (2,919 °F). Ti Grade 25 has a yield strength of 880 MPa (128 ksi) and a tensile strength of 950 MPa (138 ksi) — stronger than 78% of titanium grades. Elongation at break is 14% and the elastic modulus is 113 GPa (16.4 Msi).
What is Ti Grade 25 used for?
- Oil and gas downhole components
- Marine high-strength hardware
- Subsea valve and pump internals
- Seawater-service fasteners and studs
- Chloride-service pressure-retaining forgings
- Wellhead and completion tooling parts
Advantages
- Low embodied carbon — 35 kg CO₂/kg, better than 100% of titanium grades
- High strength — 880 MPa (128 ksi), better than 78% of titanium grades
- High service temperature — 400°C (752 °F), better than 78% of titanium grades
Limitations
- Poor heat conductor — 6.7 W/m·K (3.87 BTU/hr·ft·°F), worse than 92% of titanium grades
- Low electrical conductivity — 1 % IACS, worse than 89% of titanium grades
- Difficult to weld — 65/100, worse than 77% of titanium grades
Ti Grade 25 properties
Typical room-temperature values for Ti Grade 25-Annealed; bars are the position among titanium grades.
Physical3
Ti Grade 25 has a density of 4.43 g/cm³ (0.16 lb/in³), lighter than 89% of titanium grades. It melts at 1,604°C (2,919 °F).
Mechanical16
Ti Grade 25 has a yield strength of 880 MPa (128 ksi) and a tensile strength of 950 MPa (138 ksi) — stronger than 78% of titanium grades. Elongation at break is 14% and the elastic modulus is 113 GPa (16.4 Msi).
Thermal6
Ti Grade 25 is rated for continuous service to 400°C (752 °F). It conducts heat at 6.7 W/m·K (3.87 BTU/hr·ft·°F), worse than 92% of titanium grades. Thermal expansion is 8.7 µm/m·K (4.83 µin/in·°F).
Electrical3
Ti Grade 25 conducts electricity at 1 % IACS, worse than 89% of titanium grades.
Chemical & Environmental3
Corrosion resistance is excellent (95/100), better than 83% of titanium grades.
Sustainability4
Producing a kilogram of Ti Grade 25 takes about 640 MJ of energy and emits 35 kg of CO₂ — less than 93% of titanium grades. Typical recycled content is 25%.
Manufacturability8
Ti Grade 25's machinability is poor (20/100, worse than 68% of titanium grades); weldability good (65/100); formability poor (25/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the titanium family
Yield strength against density for every titanium grade FabDigit runs. Ti Grade 25 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Ti Grade 25
Is Ti Grade 25 easy to machine?
Machine like Ti-6Al-4V: rigid setups, sharp uncoated-carbide or PVD tools, ~30–60 m/min surface speed, heavy flood coolant, never dwell in the cut.
Can Ti Grade 25 be welded?
GTAW/EBW/plasma with full inert shielding and trailing/backing gas; clean joints, keep interstitial pickup low, use matching Gr.25 or ERTi-5 filler.
Can Ti Grade 25 be formed, bent or molded?
Cold formability is limited (bend radii ≥4–5t); hot form or superplastic form at 750–900 °C, then descale and pickle.
Ti Grade 25 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 |
|---|---|---|
| Al | 5.5 – 6.75 | 6.2 |
| V | 3.5 – 4.5 | 4 |
| Ni | 0.3 – 0.8 | 0.5 |
| Pd | 0.04 – 0.08 | 0.06 |
| Fe | ≤ 0.4 | 0.2 |
| O | ≤ 0.2 | 0.15 |
| C | ≤ 0.08 | 0.02 |
| N | ≤ 0.05 | 0.02 |
| H0.0125 % max for sheet/strip per B265 | ≤ 0.02 | 0.01 |
| Residuals, each | ≤ 0.1 | |
| Residuals, total | ≤ 0.4 | |
| Ti | balance |
What surface finishes work on Ti Grade 25?
Pickle in HNO3/HF after hot work to remove alpha case; colour anodize or polish; avoid chloride-bearing marking inks before heat treatment.
Surface treatments FabDigit runs on titanium parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Titanium Ti Grade 25 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- R56403
- Also called
- Ti-6Al-4V-Ni-Pd
How much does Ti Grade 25 cost?
Ti Grade 25 is a high-cost titanium ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Ti Grade 25 — frequently asked
What is Ti Grade 25 used for?
Ti Grade 25 is typically used for oil and gas downhole components, marine high-strength hardware, subsea valve and pump internals, seawater-service fasteners and studs, chloride-service pressure-retaining forgings and wellhead and completion tooling parts. In short: grade 5 strength, crevice resistant; built for hot chlorides; high-cost alloy addition.
What is the yield strength of Ti Grade 25?
Ti Grade 25 has a typical yield strength of 880 MPa (128 ksi) and a tensile strength of 950 MPa (138 ksi) — stronger than 78% of titanium grades. Strength varies by condition: see the 4 listed tempers.
Is Ti Grade 25 easy to machine?
Not especially — machinability is rated poor (20/100, worse than 68% of titanium grades). Machine like Ti-6Al-4V: rigid setups, sharp uncoated-carbide or PVD tools, ~30–60 m/min surface speed, heavy flood coolant, never dwell in the cut.
Can Ti Grade 25 be welded?
Yes — weldability is rated good (65/100). GTAW/EBW/plasma with full inert shielding and trailing/backing gas; clean joints, keep interstitial pickup low, use matching Gr.25 or ERTi-5 filler.
What surface finishes work on Ti Grade 25?
Pickle in HNO3/HF after hot work to remove alpha case; colour anodize or polish; avoid chloride-bearing marking inks before heat treatment.
Can Ti Grade 25 be formed, bent or molded?
Cold formability is limited (bend radii ≥4–5t); hot form or superplastic form at 750–900 °C, then descale and pickle.
What is the maximum service temperature of Ti Grade 25?
Ti Grade 25 is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Ti Grade 25 Annealed and Ti Grade 25-STA?
Annealed is the default condition — standard stock condition for plate, sheet, bar and pipe; best combination of ductility, weldability and corrosion resistance. STA: choose for maximum strength in thin sections (downhole tubulars, fasteners); slightly lower toughness and ductility than annealed. Yield strength is 880 MPa in Annealed versus 1,010 MPa in STA.
How much does Ti Grade 25 cost?
Ti Grade 25 is a high-cost titanium ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
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 B861 – Titanium and Titanium Alloy Seamless Pipe — ASTM International (2019)
- ASM Handbook Vol. 2 – Properties and Selection: Nonferrous Alloys — ASM International (1990)
- Materials Properties Handbook: Titanium Alloys — ASM International (1994)
- MMPDS Ti-6Al-4V design allowables — Battelle/FAA (2023)
- Corrosion-resistant titanium alloy grades (Gr.7/Gr.16/Gr.24/Gr.25) data — Titanium mill producer literature (2022)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.