Titanium VT5L-HIP (Hot isostatic pressed)
Print state
GB VT5L
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 %.
Values for the HIP condition
Other VT5L tempers and conditions
VT5L is listed in 4 conditions; see the grade overview at VT5L.
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 | — |
HIPThis page 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-HIP?
VT5L-HIP is VT5L in the HIP condition — 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 %. VT5L-HIP has a yield strength of 655 MPa (95 ksi) and a tensile strength of 770 MPa (112 ksi) — stronger than 52% of titanium grades. Elongation at break is 12% and the elastic modulus is 112 GPa (16.2 Msi). VT5L-HIP 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). F is the default condition FabDigit quotes; HIP is available on request or by drawing note.
Advantages
- High service temperature — 400°C (752 °F), better than 78% of titanium grades
Limitations
- Hard to polish — 60/100, worse than 97% of titanium grades
- Limited ductility — 12%, worse than 78% of titanium grades
- Limited formability — 22/100, worse than 78% of titanium grades
VT5L-HIP properties
Typical room-temperature values for VT5L-HIP; 22 are specific to this condition. Other listed values are VT5L reference data and may not represent this condition. Bars are the position among titanium grades.
Physical3
VT5L-HIP 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-HIP has a yield strength of 655 MPa (95 ksi) and a tensile strength of 770 MPa (112 ksi) — stronger than 52% of titanium grades. Elongation at break is 12% and the elastic modulus is 112 GPa (16.2 Msi).
Thermal6
VT5L-HIP 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-HIP 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-HIP 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-HIP's machinability is poor (23/100, worse than 52% of titanium grades); weldability very good (80/100); formability poor (22/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with VT5L-HIP
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.
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.
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 | — |
VT5L-HIP — frequently asked
What is VT5L-HIP used for?
VT5L-HIP 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-HIP?
VT5L-HIP has a typical yield strength of 655 MPa (95 ksi) and a tensile strength of 770 MPa (112 ksi) — stronger than 52% of titanium grades. Strength varies by condition: see the 4 listed tempers.
Is VT5L-HIP easy to machine?
Not especially — machinability is rated poor (23/100, worse than 52% 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-HIP 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-HIP?
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-HIP 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-HIP?
VT5L-HIP 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.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.