Titanium VT5L
GB VT5L
VT5L is an alpha titanium casting alloy to GOST 19807, the cast analogue of wrought VT5, combining moderate strength with good castability and weldability for general industrial castings.
Reference datasheet — VT5L 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 F condition
VT5L tempers and conditions
VT5L is supplied in 4 conditions, soft to hard. F 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 |
|---|---|---|---|---|---|---|
Annealed | Pick when casting and weld-repair residual stress must be removed and dimensions stabilised: a 750–800 °C air-cooled anneal trades yield down to 620 MPa for 10 % elongation and more toughness. | 620 | 730 | 10 | 25 HRC | 1.2 % IACS |
HIP + Anneal | Specify the highest aerospace quality level: densification plus a 750–800 °C stress-relief anneal balances fatigue life, 13 % elongation and dimensional stability in machining at 635 MPa yield. | 635 | 750 | 13 | 24 HRC | 1.2 % IACS |
FDefault As fabricated | Default delivery state: vacuum skull-melted graphite-mould or investment castings that are only cleaned, for complex, moderately loaded housings, pumps and valve bodies at 650 MPa yield. | 650 | 750 | 8 | 270 HB | — |
Hot isostatic pressed | Choose for aerospace and marine load-bearing castings held to X-ray internal-quality limits: ~920 °C / 100–140 MPa / 2 h pressing closes shrinkage and gas porosity, lifting fatigue life and elongation to 12 %. | 655 | 770 | 12 | 26 HRC | 1.2 % IACS |
What is VT5L?
VT5L is an alpha titanium casting alloy to GOST 19807, the cast analogue of wrought VT5, combining moderate strength with good castability and weldability for general industrial castings. Typical properties are 650 MPa yield, 750 MPa tensile, 8 % elongation and 270 HB, with service to about 400 °C, supplied as-cast, annealed, HIP or HIP + annealed. Its single-phase alpha structure resists hot cracking and flows better than two-phase titanium alloys, but strength is well below cast Ti-6Al-4V (ZTC4 / C-23), machinability is low (score 22) and supply is tied to GOST-standard foundries. VT5L has a density of 4.42 g/cm³ (0.16 lb/in³), lighter than 96% of titanium grades. It melts at 1,600°C (2,912 °F). VT5L has a yield strength of 650 MPa (94.3 ksi) and a tensile strength of 750 MPa (109 ksi) — stronger than 52% of titanium grades. Elongation at break is 8% and the elastic modulus is 112 GPa (16.2 Msi).
What is VT5L used for?
- pump housings
- aerospace fittings
- chemical equipment castings
Advantages
- High service temperature — 400°C (752 °F), better than 78% of titanium grades
Limitations
- Limited ductility — 8%, worse than 99% of titanium grades
- Hard to polish — 60/100, worse than 97% of titanium grades
- Low fracture toughness — 58 MPa·√m (52.8 ksi·√in), worse than 87% of titanium grades
- Limited formability — 20/100, worse than 83% of titanium grades
VT5L properties
Typical room-temperature values for VT5L-F; bars are the position among titanium grades.
Physical3
VT5L has a density of 4.42 g/cm³ (0.16 lb/in³), lighter than 96% of titanium grades. It melts at 1,600°C (2,912 °F).
Mechanical16
VT5L has a yield strength of 650 MPa (94.3 ksi) and a tensile strength of 750 MPa (109 ksi) — stronger than 52% of titanium grades. Elongation at break is 8% and the elastic modulus is 112 GPa (16.2 Msi).
Thermal6
VT5L is rated for continuous service to 400°C (752 °F). It conducts heat at 8.4 W/m·K (4.85 BTU/hr·ft·°F), better than 53% of titanium grades. Thermal expansion is 8.8 µm/m·K (4.89 µin/in·°F).
Electrical3
VT5L conducts electricity at 1.2 % IACS, worse than 55% of titanium grades.
Chemical & Environmental3
Corrosion resistance is excellent (90/100), worse than 63% of titanium grades.
Sustainability4
Producing a kilogram of VT5L takes about 640 MJ of energy and emits 40 kg of CO₂ — less than 93% of titanium grades. Typical recycled content is 30%.
Manufacturability8
VT5L's machinability is poor (22/100, worse than 55% of titanium grades); weldability very good (80/100); formability poor (20/100).
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. VT5L is highlighted; hover a dot for its name, or open the interactive family chart.
Working with VT5L
Is VT5L easy to machine?
Run low speed with heavy feed, rigid clamping and copious high-pressure coolant, using sharp uncoated-carbide or PVD-coated tools. Keep depth of cut greater than the work-hardened layer left by the previous pass, and treat chips as flammable.
Can VT5L be welded?
The single-phase alpha structure has no hot-cracking tendency, so TIG, plasma and electron-beam welding, including casting weld repair, are practical. Maintain full inert-gas or vacuum shielding throughout, then stress-relief anneal at 750–800 °C.
Can VT5L be formed, bent or molded?
Normally vacuum skull-melted and poured into graphite, metal or investment moulds, including centrifugal casting; fluidity is better than that of two-phase titanium alloys. Use large risers for feeding and HIP the castings to close internal porosity.
VT5L 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 |
|---|---|---|
| Almain alpha-stabilizing solid-solution strengthening element | 4.1 – 6.2 | 5.2 |
| Zrresidual amount permitted | ≤ 0.8 | |
| Si | ≤ 0.15 | |
| Fe | ≤ 0.3 | |
| C | ≤ 0.15 | |
| Ooxygen content directly affects strength and ductility | ≤ 0.2 | |
| N | ≤ 0.05 | |
| H | ≤ 0.02 | |
| other impurities (total)sum of other impurities | ≤ 0.3 | |
| Ti | balance |
What surface finishes work on VT5L?
After grit blasting, pickle in HNO3/HF to remove the oxygen-rich alpha case. Colour anodizing, micro-arc oxidation or sprayed coatings can follow; electroplating is generally not used.
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
How much does VT5L cost?
VT5L 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.
VT5L — frequently asked
What is VT5L used for?
VT5L is typically used for pump housings, aerospace fittings and chemical equipment castings. In short: good-flowing alpha cast titanium; no hot-cracking tendency; weldable general-purpose castings.
What is the yield strength of VT5L?
VT5L has a typical yield strength of 650 MPa (94.3 ksi) and a tensile strength of 750 MPa (109 ksi) — stronger than 52% of titanium grades. Strength varies by condition: see the 4 listed tempers.
Is VT5L easy to machine?
Not especially — machinability is rated poor (22/100, worse than 55% of titanium grades). Run low speed with heavy feed, rigid clamping and copious high-pressure coolant, using sharp uncoated-carbide or PVD-coated tools. Keep depth of cut greater than the work-hardened layer left by the previous pass, and treat chips as flammable.
Can VT5L be welded?
Yes — weldability is rated very good (80/100). The single-phase alpha structure has no hot-cracking tendency, so TIG, plasma and electron-beam welding, including casting weld repair, are practical. Maintain full inert-gas or vacuum shielding throughout, then stress-relief anneal at 750–800 °C.
What surface finishes work on VT5L?
After grit blasting, pickle in HNO3/HF to remove the oxygen-rich alpha case. Colour anodizing, micro-arc oxidation or sprayed coatings can follow; electroplating is generally not used.
Can VT5L be formed, bent or molded?
Normally vacuum skull-melted and poured into graphite, metal or investment moulds, including centrifugal casting; fluidity is better than that of two-phase titanium alloys. Use large risers for feeding and HIP the castings to close internal porosity.
What is the maximum service temperature of VT5L?
VT5L 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 VT5L-F and VT5L-ANN?
F is the default condition — default delivery state: vacuum skull-melted graphite-mould or investment castings that are only cleaned, for complex, moderately loaded housings, pumps and valve bodies at 650 MPa yield. ANN: pick when casting and weld-repair residual stress must be removed and dimensions stabilised: a 750–800 °C air-cooled anneal trades yield down to 620 MPa for 10 % elongation and more toughness. Yield strength is 650 MPa in F versus 620 MPa in ANN.
How much does VT5L cost?
VT5L 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
- ГОСТ 19807 — Титан и сплавы титановые деформируемые. Марки — Госстандарт (1991)
- ОСТ 1 90060 — Титановые сплавы литейные — Минавиапром (1992)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- Materials Properties Handbook: Titanium Alloys — ASM International (1994)
- ASTM B367 — Titanium and Titanium Alloy Castings — ASTM (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.