Titanium Ti-6Al-4V (AM, F2924)-STA (Solution treated and aged)
Heat-treated state
UNS R56400 · ASTM F2924
Use when maximum strength in thin sections is needed and reduced ductility/toughness is acceptable.
Values for the STA condition
Other Ti-6Al-4V (AM, F2924) tempers and conditions
Ti-6Al-4V (AM, F2924) is listed in 6 conditions; see the grade overview at Ti-6Al-4V (AM, F2924).
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Hot isostatic pressed | Standard for flight- and implant-critical parts: closes gas porosity and lack-of-fusion, maximising ductility, toughness and fatigue life. | 880 | 970 | 16 | 32 HRC | 7 W/m·K |
Electron-beam PBF as-built | Pick for EBM/EB-PBF parts (large Ti implants, lattices): built structure is already annealed-like, so ductility is good without post-HT, but surface roughness is higher. | 900 | 990 | 14 | 33 HRC | — |
Annealed | Choose for wrought-annealed-equivalent properties and better ductility/anisotropy balance when HIP is not required. | 920 | 1,010 | 14 | 33 HRC | 7 W/m·K |
SRDefault Stress relieved | Default commercial condition: removes build residual stress before plate removal while keeping high strength; use where static strength dominates. | 1,040 | 1,150 | 11 | 36 HRC | — |
STAThis page Solution treated and aged | Use when maximum strength in thin sections is needed and reduced ductility/toughness is acceptable. | 1,090 | 1,180 | 10 | 38 HRC | — |
As built (as printed) | Pick only for non-critical or prototype parts: highest strength but high residual stress, α' martensitic structure, low ductility and poor fatigue life. | 1,120 | 1,250 | 7 | 41 HRC | 7 W/m·K |
What is Ti-6Al-4V (AM, F2924)-STA?
Ti-6Al-4V (AM, F2924)-STA is Ti-6Al-4V (AM, F2924) heat treated to STA — use when maximum strength in thin sections is needed and reduced ductility/toughness is acceptable. Ti-6Al-4V (AM, F2924)-STA has a yield strength of 1,090 MPa (158 ksi) and a tensile strength of 1,180 MPa (171 ksi) — stronger than 98% of titanium grades. Elongation at break is 10% and the elastic modulus is 113 GPa (16.4 Msi). Ti-6Al-4V (AM, F2924)-STA 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). SR is the default condition FabDigit quotes; STA is available on request or by drawing note.
Advantages
- High strength — 1,090 MPa (158 ksi), better than 98% of titanium grades
Limitations
- Low fracture toughness — 48 MPa·√m (43.7 ksi·√in), worse than 97% of titanium grades
- Limited ductility — 10%, worse than 93% of titanium grades
- Low electrical conductivity — 1 % IACS, worse than 89% of titanium grades
- Poor heat conductor — 6.8 W/m·K (3.93 BTU/hr·ft·°F), worse than 86% of titanium grades
- Limited formability — 20/100, worse than 83% of titanium grades
Ti-6Al-4V (AM, F2924)-STA properties
Typical room-temperature values for Ti-6Al-4V (AM, F2924)-STA; 11 are specific to this condition. Other listed values are Ti-6Al-4V (AM, F2924) reference data and may not represent this condition. Bars are the position among titanium grades.
Physical3
Ti-6Al-4V (AM, F2924)-STA 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-6Al-4V (AM, F2924)-STA has a yield strength of 1,090 MPa (158 ksi) and a tensile strength of 1,180 MPa (171 ksi) — stronger than 98% of titanium grades. Elongation at break is 10% and the elastic modulus is 113 GPa (16.4 Msi).
Thermal6
Ti-6Al-4V (AM, F2924)-STA is rated for continuous service to 315°C (599 °F). It conducts heat at 6.8 W/m·K (3.93 BTU/hr·ft·°F), worse than 86% of titanium grades. Thermal expansion is 8.7 µm/m·K (4.83 µin/in·°F).
Electrical3
Ti-6Al-4V (AM, F2924)-STA conducts electricity at 1 % IACS, worse than 89% of titanium grades.
Chemical & Environmental3
Corrosion resistance is excellent (92/100), better than 53% of titanium grades.
Sustainability4
Producing a kilogram of Ti-6Al-4V (AM, F2924)-STA takes about 720 MJ of energy and emits 46 kg of CO₂ — more than 92% of titanium grades. Typical recycled content is 10%.
Manufacturability7
Ti-6Al-4V (AM, F2924)-STA's machinability is poor (16/100, worse than 93% of titanium grades); weldability good (65/100); formability poor (20/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Ti-6Al-4V (AM, F2924)-STA
Is Ti-6Al-4V (AM, F2924) easy to machine?
Machine with rigid setups, sharp uncoated-carbide or AlTiN tools, low surface speed (30–50 m/min) and copious high-pressure coolant; never dwell — work hardening and chip fires are the main risks.
Can Ti-6Al-4V (AM, F2924) be welded?
Excellent by GTAW, laser and EB welding with full argon/vacuum shielding and back purge; keep O/N/H pick-up low, avoid oxide-contaminated (straw/blue) welds, no flux processes.
Can Ti-6Al-4V (AM, F2924) be formed, bent or molded?
Net shape comes from the build; supports and lattices must be designed for removal, and thin walls need stress relief on the plate before cutting off to prevent distortion.
What surface finishes work on Ti-6Al-4V (AM, F2924)?
Blast/tumble to remove partially sintered powder, then chemical milling, abrasive-flow or shot-peening for fatigue-critical surfaces; anodize (AMS2488) or passivate for medical use.
Ti-6Al-4V (AM, F2924) 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 | 6.1 |
| V | 3.5 – 4.5 | 4 |
| Fe | ≤ 0.3 | 0.18 |
| Ocontrolled on powder reuse; ELI variants ≤0.13 | ≤ 0.2 | 0.12 |
| N | ≤ 0.05 | 0.02 |
| C | ≤ 0.08 | 0.02 |
| H0.015 max for powder-bed fusion parts | ≤ 0.02 | 0 |
| Y | ≤ 0.01 | — |
| Other elements, each | ≤ 0.1 | — |
| Other elements, total | ≤ 0.4 | — |
| Tibalance ≈ 89–91 % | balance | — |
Ti-6Al-4V (AM, F2924)-STA — frequently asked
What is Ti-6Al-4V (AM, F2924)-STA used for?
Ti-6Al-4V (AM, F2924)-STA is typically used for aerospace brackets and housings, medical implants (non-ELI), complex lattice structures, prototype tooling and turbine and engine components. In short: highest-strength printed titanium; powder-bed fusion Ti-6Al-4V; aerospace and medical AM spec.
What is the yield strength of Ti-6Al-4V (AM, F2924)-STA?
Ti-6Al-4V (AM, F2924)-STA has a typical yield strength of 1,090 MPa (158 ksi) and a tensile strength of 1,180 MPa (171 ksi) — stronger than 98% of titanium grades. Strength varies by condition: see the 6 listed tempers.
Is Ti-6Al-4V (AM, F2924)-STA easy to machine?
Not especially — machinability is rated poor (16/100, worse than 93% of titanium grades). Machine with rigid setups, sharp uncoated-carbide or AlTiN tools, low surface speed (30–50 m/min) and copious high-pressure coolant; never dwell — work hardening and chip fires are the main risks.
Can Ti-6Al-4V (AM, F2924)-STA be welded?
Yes — weldability is rated good (65/100). Excellent by GTAW, laser and EB welding with full argon/vacuum shielding and back purge; keep O/N/H pick-up low, avoid oxide-contaminated (straw/blue) welds, no flux processes.
What surface finishes work on Ti-6Al-4V (AM, F2924)-STA?
Blast/tumble to remove partially sintered powder, then chemical milling, abrasive-flow or shot-peening for fatigue-critical surfaces; anodize (AMS2488) or passivate for medical use.
Can Ti-6Al-4V (AM, F2924)-STA be formed, bent or molded?
Net shape comes from the build; supports and lattices must be designed for removal, and thin walls need stress relief on the plate before cutting off to prevent distortion.
What is the maximum service temperature of Ti-6Al-4V (AM, F2924)-STA?
Ti-6Al-4V (AM, F2924)-STA is rated for continuous use to about 315°C (599 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Ti-6Al-4V (AM, F2924)-SR and Ti-6Al-4V (AM, F2924)-HIP?
SR is the default condition — default commercial condition: removes build residual stress before plate removal while keeping high strength; use where static strength dominates. HIP: standard for flight- and implant-critical parts: closes gas porosity and lack-of-fusion, maximising ductility, toughness and fatigue life. Yield strength is 1,040 MPa in SR versus 880 MPa in HIP.
Sources
- ASTM F2924 — Additive Manufacturing Ti-6Al-4V with Powder Bed Fusion — ASTM International (2021)
- ASTM F3001 — Additive Manufacturing Ti-6Al-4V ELI with Powder Bed Fusion — ASTM International (2022)
- ASM Handbook Vol. 2 — Properties of Nonferrous Alloys (Titanium) — ASM International (1990)
- MMPDS-18, Ti-6Al-4V design allowables — Battelle/FAA (2023)
- EOS Titanium Ti64 / Ti64 ELI material data sheet — EOS GmbH (2023)
- Arcam EBM Ti6Al4V material specification — GE Additive (Arcam) (2022)
- Senvol / NIST AM Materials Database — Ti-6Al-4V PBF mechanical data compilation — Senvol (2023)
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.