Titanium Ti Grade 19 STA-M
Precip hard
UNS R58640 · also Beta C
Pick when 1100–1200 MPa with useful ductility, toughness and SCC resistance is preferred over peak strength.
Values for the STA-M condition
Other Ti Grade 19 tempers and conditions
Ti Grade 19 is listed in 4 conditions; see the grade overview at Ti Grade 19.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
STDefault Solution annealed | Pick for cold forming, coiling of springs, deep drawing or machining before a final aging cycle. | 860 | 930 | 18 | 30 HRC | — |
STA-MThis page STA | Pick when 1100–1200 MPa with useful ductility, toughness and SCC resistance is preferred over peak strength. | 1,120 | 1,180 | 10 | 38 HRC | — |
STA | Pick for maximum strength fasteners, springs and downhole tools where ductility and toughness can be traded away. | 1,240 | 1,310 | 6 | 43 HRC | — |
Cold drawn (solution treated) then aged, spring wire condition | Pick for coil and torsion springs: cold drawing before aging raises strength above conventional STA at equal ductility. | 1,330 | 1,400 | 6 | 45 HRC | — |
What is Ti Grade 19 STA-M?
Ti Grade 19 STA-M is Ti Grade 19 in the STA-M condition — pick when 1100–1200 MPa with useful ductility, toughness and SCC resistance is preferred over peak strength. Ti Grade 19 STA-M has a yield strength of 1,120 MPa (162 ksi) and a tensile strength of 1,180 MPa (171 ksi) — stronger than 99% of titanium grades. Elongation at break is 10% and the elastic modulus is 105 GPa (15.2 Msi). Ti Grade 19 STA-M has a density of 4.82 g/cm³ (0.174 lb/in³), heavier than 94% of titanium grades. It melts at 1,600°C (2,912 °F). ST is the default condition FabDigit quotes; STA-M is available on request or by drawing note.
Advantages
- High strength — 1,120 MPa (162 ksi), better than 99% of titanium grades
Limitations
- Difficult to weld — 40/100, worse than 94% of titanium grades
- Limited ductility — 10%, worse than 93% of titanium grades
- Low fracture toughness — 55 MPa·√m (50.1 ksi·√in), worse than 90% of titanium grades
- Limited formability — 20/100, worse than 83% of titanium grades
Ti Grade 19 STA-M properties
Typical room-temperature values for Ti Grade 19 STA-M; 18 are specific to this condition. Other listed values are Ti Grade 19 reference data and may not represent this condition. Bars are the position among titanium grades.
Physical3
Ti Grade 19 STA-M has a density of 4.82 g/cm³ (0.174 lb/in³), heavier than 94% of titanium grades. It melts at 1,600°C (2,912 °F).
Mechanical16
Ti Grade 19 STA-M has a yield strength of 1,120 MPa (162 ksi) and a tensile strength of 1,180 MPa (171 ksi) — stronger than 99% of titanium grades. Elongation at break is 10% and the elastic modulus is 105 GPa (15.2 Msi).
Thermal6
Ti Grade 19 STA-M is rated for continuous service to 315°C (599 °F). It conducts heat at 7.6 W/m·K (4.39 BTU/hr·ft·°F), worse than 59% of titanium grades. Thermal expansion is 9 µm/m·K (5 µin/in·°F).
Electrical3
Ti Grade 19 STA-M conducts electricity at 1.1 % IACS, worse than 67% of titanium grades.
Chemical & Environmental3
Corrosion resistance is excellent (87/100), worse than 85% of titanium grades.
Sustainability4
Producing a kilogram of Ti Grade 19 STA-M takes about 700 MJ of energy and emits 45 kg of CO₂ — more than 74% of titanium grades. Typical recycled content is 30%.
Manufacturability8
Ti Grade 19 STA-M's machinability is poor (15/100, worse than 97% of titanium grades); weldability fair (40/100); formability poor (20/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Ti Grade 19 STA-M
Is Ti Grade 19 easy to machine?
Machine with rigid setups, sharp uncoated-carbide or PVD-coated tools, low surface speed (15–30 m/min aged), heavy feed and flood high-pressure coolant; never dwell, and machine in the solution-treated state where possible.
Can Ti Grade 19 be welded?
GTAW/plasma/EB weld with full inert-gas or vacuum shielding and matching filler; welds are soft as-welded and should be re-solution treated and aged to restore strength.
Can Ti Grade 19 be formed, bent or molded?
Cold form, coil, bend and draw in the solution-treated condition (springback is high, allow generous overbend), then age to final strength; hot work above the ~730–760 °C beta transus.
What surface finishes work on Ti Grade 19?
Pickle in HNO₃/HF or grit-blast plus chemical clean to remove alpha case; color anodize per AMS 2488 Type II, or apply dry-film lube/anti-gall coatings for threaded parts.
Ti Grade 19 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 | 3 – 4 | 3.5 |
| V | 7.5 – 8.5 | 8 |
| Cr | 5.5 – 6.5 | 6 |
| Mo | 3.5 – 4.5 | 4 |
| Zr | 3.5 – 4.5 | 4 |
| Fe | ≤ 0.3 | — |
| O | ≤ 0.14 | — |
| C | ≤ 0.05 | — |
| N | ≤ 0.03 | — |
| Hmax, bar/billet | ≤ 0.02 | — |
| Other, eachresiduals, each | ≤ 0.1 | — |
| Other, totalresiduals, total | ≤ 0.4 | — |
| Ti | balance | — |
Ti Grade 19 STA-M — frequently asked
What is Ti Grade 19 STA-M used for?
Ti Grade 19 STA-M is typically used for aerospace fasteners and springs, landing gear components and high-strength structural parts. In short: heat-treatable beta titanium; cold formable then aged; low modulus spring alloy.
What is the yield strength of Ti Grade 19 STA-M?
Ti Grade 19 STA-M has a typical yield strength of 1,120 MPa (162 ksi) and a tensile strength of 1,180 MPa (171 ksi) — stronger than 99% of titanium grades. Strength varies by condition: see the 4 listed tempers.
Is Ti Grade 19 STA-M easy to machine?
Not especially — machinability is rated poor (15/100, worse than 97% of titanium grades). Machine with rigid setups, sharp uncoated-carbide or PVD-coated tools, low surface speed (15–30 m/min aged), heavy feed and flood high-pressure coolant; never dwell, and machine in the solution-treated state where possible.
Can Ti Grade 19 STA-M be welded?
With care — weldability is rated fair (40/100). GTAW/plasma/EB weld with full inert-gas or vacuum shielding and matching filler; welds are soft as-welded and should be re-solution treated and aged to restore strength.
What surface finishes work on Ti Grade 19 STA-M?
Pickle in HNO₃/HF or grit-blast plus chemical clean to remove alpha case; color anodize per AMS 2488 Type II, or apply dry-film lube/anti-gall coatings for threaded parts.
Can Ti Grade 19 STA-M be formed, bent or molded?
Cold form, coil, bend and draw in the solution-treated condition (springback is high, allow generous overbend), then age to final strength; hot work above the ~730–760 °C beta transus.
What is the maximum service temperature of Ti Grade 19 STA-M?
Ti Grade 19 STA-M 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 Grade 19-ST and Ti Grade 19 STA-H?
ST is the default condition — pick for cold forming, coiling of springs, deep drawing or machining before a final aging cycle. STA-H: pick for maximum strength fasteners, springs and downhole tools where ductility and toughness can be traded away. Yield strength is 860 MPa in ST versus 1,240 MPa in STA-H.
Sources
- ASTM B348 / B348M — Titanium and Titanium Alloy Bars and Billets (Grade 19) — ASTM International (2021)
- ASTM B265 — Titanium and Titanium Alloy Strip, Sheet and Plate — ASTM International (2020)
- AMS 4957 / AMS 4958 — Ti-3Al-8V-6Cr-4Mo-4Zr bar and wire — SAE International (2018)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- Materials Properties Handbook: Titanium Alloys — ASM International (1994)
- Beta C (Ti-3Al-8V-6Cr-4Mo-4Zr) alloy datasheet — RMI Titanium / TIMET (2015)
- GB/T 2965 (TB9) — SAC (2007)
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.