Titanium Ti-15Mo
UNS R58150 · ASTM F2066
Ti-15Mo is a binary beta titanium alloy (ASTM F2066, UNS R58150) stabilized with molybdenum only, containing no aluminum or vanadium.
Reference datasheet — Ti-15Mo 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 ST condition
Ti-15Mo tempers and conditions
Ti-15Mo is supplied in 5 conditions, soft to hard. ST is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
STDefault Solution annealed | Standard stocked implant condition: single-phase beta, lowest modulus, best ductility and cold formability. | 570 | 760 | 22 | 27 HRC | — |
Mill annealed / hot worked and annealed | Plate, sheet and bar as hot worked then recrystallisation annealed; slightly higher strength than water-quenched ST because of fine α, marginally lower ductility. | 650 | 820 | 18 | 30 HRC | — |
Cold worked | Cold drawn wire, screws and small bar where high yield strength is needed without an aging cycle. | 900 | 980 | 12 | 34 HRC | 1.2 % IACS |
Solution treated and aged | Choose when implant or component strength must exceed 1000 MPa and reduced ductility/toughness is acceptable. | 1,010 | 1,100 | 10 | 38 HRC | — |
Cold worked and aged | Highest strength route for small-section wire, pins and fixation screws; ductility drops to single digits. | 1,150 | 1,220 | 8 | 41 HRC | — |
What is Ti-15Mo?
Ti-15Mo is a binary beta titanium alloy (ASTM F2066, UNS R58150) stabilized with molybdenum only, containing no aluminum or vanadium. Engineers specify it for implants because the elastic modulus is about 78 GPa — well below alpha-beta titanium — with 570 MPa yield, 760 MPa tensile, 22% elongation and 27 HRC in the default condition; it is supplied as bar, wire, plate and forgings in ST, MA, STA, CW and CW+A conditions. Limits are poor machinability (score 24), a service ceiling near 300 °C, and narrower mill availability than Ti-6Al-4V. Where higher strength matters more than low modulus, Ti-6Al-4V ELI is the usual alternative. Ti-15Mo has a density of 4.96 g/cm³ (0.179 lb/in³), heavier than 98% of titanium grades. It melts at 1,670°C (3,038 °F). Ti-15Mo has a yield strength of 570 MPa (82.7 ksi) and a tensile strength of 760 MPa (110 ksi) — weaker than 52% of titanium grades. Elongation at break is 22% and the elastic modulus is 78 GPa (11.3 Msi).
What is Ti-15Mo used for?
- surgical implants
- dental devices
- biomedical fasteners
Advantages
- Polishes to a fine finish — 80/100, better than 98% of titanium grades
- Tough — resists crack growth — 90 MPa·√m (81.9 ksi·√in), better than 97% of titanium grades
- Forms and bends easily — 80/100, better than 90% of titanium grades
Limitations
- Low stiffness — 78 GPa (11.3 Msi), worse than 99% of titanium grades
Ti-15Mo properties
Typical room-temperature values for Ti-15Mo-ST; bars are the position among titanium grades.
Physical3
Ti-15Mo has a density of 4.96 g/cm³ (0.179 lb/in³), heavier than 98% of titanium grades. It melts at 1,670°C (3,038 °F).
Mechanical15
Ti-15Mo has a yield strength of 570 MPa (82.7 ksi) and a tensile strength of 760 MPa (110 ksi) — weaker than 52% of titanium grades. Elongation at break is 22% and the elastic modulus is 78 GPa (11.3 Msi).
Thermal6
Ti-15Mo is rated for continuous service to 300°C (572 °F). It conducts heat at 8.5 W/m·K (4.91 BTU/hr·ft·°F), better than 55% of titanium grades. Thermal expansion is 8.7 µm/m·K (4.83 µin/in·°F).
Electrical3
Ti-15Mo conducts electricity at 1.2 % IACS, worse than 55% of titanium grades.
Chemical & Environmental3
Corrosion resistance is excellent (93/100), better than 72% of titanium grades.
Sustainability4
Producing a kilogram of Ti-15Mo takes about 700 MJ of energy and emits 45 kg of CO₂ — more than 74% of titanium grades. Typical recycled content is 5%.
Manufacturability8
Ti-15Mo's machinability is poor (24/100, worse than 51% of titanium grades); weldability very good (72/100); formability very good (80/100).
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-15Mo is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Ti-15Mo
Is Ti-15Mo easy to machine?
Machine like a tough beta titanium: rigid setup, sharp uncoated-carbide or AlTiN tools, low surface speed (~20–35 m/min), heavy feed, copious flood coolant and no dwelling — work hardening and galling are worse than Ti-6Al-4V.
Can Ti-15Mo be welded?
GTAW/PAW/EBW/laser weld readily in inert gas or vacuum with matching filler; beta phase keeps welds ductile as-welded, but avoid contamination pickup and re-solution treat if aging is planned.
Can Ti-15Mo be formed, bent or molded?
In the solution-treated beta condition it is the most cold-formable titanium class — bending, deep drawing and wire drawing are practical; hot working above the ~750 °C beta transus for forging, then solution treat before final forming.
Ti-15Mo 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 |
|---|---|---|
| Mobeta stabiliser | 14 – 16 | 15 |
| Fe | ≤ 0.1 | 0.03 |
| Ointerstitial, controls strength | ≤ 0.2 | 0.12 |
| C | ≤ 0.1 | 0.02 |
| N | ≤ 0.05 | 0.01 |
| H | ≤ 0.02 | 0.01 |
| Other, eachresidual elements | ≤ 0.1 | |
| Other, totalresidual elements total | ≤ 0.4 | |
| Ti | balance |
What surface finishes work on Ti-15Mo?
Polishes to implant-quality finish; passivates spontaneously and can be nitric-acid passivated, colour-anodised for part identification, chemically etched/blasted, or given hydroxyapatite/anodic bio-surfaces.
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-15Mo in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- R58150
- ASTM
- F2066
How much does Ti-15Mo cost?
Ti-15Mo 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-15Mo — frequently asked
What is Ti-15Mo used for?
Ti-15Mo is typically used for surgical implants, dental devices and biomedical fasteners. In short: lowest-modulus implant titanium; most cold-formable titanium class; aluminum- and vanadium-free.
What is the yield strength of Ti-15Mo?
Ti-15Mo has a typical yield strength of 570 MPa (82.7 ksi) and a tensile strength of 760 MPa (110 ksi) — weaker than 52% of titanium grades. Strength varies by condition: see the 5 listed tempers.
Is Ti-15Mo easy to machine?
Not especially — machinability is rated poor (24/100, worse than 51% of titanium grades). Machine like a tough beta titanium: rigid setup, sharp uncoated-carbide or AlTiN tools, low surface speed (~20–35 m/min), heavy feed, copious flood coolant and no dwelling — work hardening and galling are worse than Ti-6Al-4V.
Can Ti-15Mo be welded?
Yes — weldability is rated very good (72/100). GTAW/PAW/EBW/laser weld readily in inert gas or vacuum with matching filler; beta phase keeps welds ductile as-welded, but avoid contamination pickup and re-solution treat if aging is planned.
What surface finishes work on Ti-15Mo?
Polishes to implant-quality finish; passivates spontaneously and can be nitric-acid passivated, colour-anodised for part identification, chemically etched/blasted, or given hydroxyapatite/anodic bio-surfaces.
Can Ti-15Mo be formed, bent or molded?
In the solution-treated beta condition it is the most cold-formable titanium class — bending, deep drawing and wire drawing are practical; hot working above the ~750 °C beta transus for forging, then solution treat before final forming.
What is the maximum service temperature of Ti-15Mo?
Ti-15Mo 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-15Mo-ST and Ti-15Mo-STA?
ST is the default condition — standard stocked implant condition: single-phase beta, lowest modulus, best ductility and cold formability. STA: choose when implant or component strength must exceed 1000 MPa and reduced ductility/toughness is acceptable. Yield strength is 570 MPa in ST versus 1,010 MPa in STA.
How much does Ti-15Mo cost?
Ti-15Mo 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 F2066 — Standard Specification for Wrought Titanium-15 Molybdenum Alloy for Surgical Implant Applications (UNS R58150) — ASTM International (2018)
- ASM Handbook, Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- Materials Properties Handbook: Titanium Alloys — ASM International (1994)
- Medical-grade beta titanium bar and wire datasheets (Ti-15Mo) — titanium mill suppliers (2023)
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.