Titanium Ti Grade 3
UNS R50550 · EN 3.7065 · JIS Class 3 · GB TA3
Ti Grade 3 (UNS R50550, 3.7065, ASTM B265/B348, TA3) is the higher-strength commercially pure titanium, using increased oxygen content to lift strength above Grade 2 while keeping the same corrosion behaviour.
Reference datasheet — Ti Grade 3 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 ANN condition
Ti Grade 3 tempers and conditions
Ti Grade 3 is supplied in 4 conditions, soft to hard. ANN 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 |
|---|---|---|---|---|---|---|
Hot Worked | Economical condition for thick plate, billet and forgings that will be machined or annealed later. | 415 | 510 | 19 | 205 HB | 3.1 % IACS |
ANNDefault Annealed | Default stocked condition for ASTM B265 plate/sheet and B348 bar; best balance of strength, ductility and weldability. | 420 | 500 | 20 | 200 HB | — |
Cold Worked + Stress Relieved | Standard condition for seamless condenser/heat-exchanger tube (ASTM B338) and precision bar; retains most cold-work strength with reduced residual stress. | 480 | 550 | 16 | 21 HRC | 3.1 % IACS |
Cold worked | Pick for cold-drawn bar, wire and strip where higher strength and straightness matter more than ductility. | 550 | 620 | 14 | 22 HRC | — |
Supply forms, finishes and certifications
Ways Ti Grade 3 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
F67 | ASTM F67 Grade 3 | Certification |
What is Ti Grade 3?
Ti Grade 3 (UNS R50550, 3.7065, ASTM B265/B348, TA3) is the higher-strength commercially pure titanium, using increased oxygen content to lift strength above Grade 2 while keeping the same corrosion behaviour. Annealed properties are 420 MPa yield, 500 MPa tensile, 20% elongation and 200 HB (94 HRB), with weldability scored 85 and formability 55, supplied as sheet, plate, bar and cold-worked stress-relieved product. The higher oxygen reduces ductility and cold formability, machinability is low (score 30), and service is limited to about 300 °C. Grade 2 is the alternative when forming or drawing governs. Ti Grade 3 has a density of 4.51 g/cm³ (0.163 lb/in³), heavier than 57% of titanium grades. It melts at 1,660°C (3,020 °F). Ti Grade 3 has a yield strength of 420 MPa (60.9 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 68% of titanium grades. Elongation at break is 20% and the elastic modulus is 103 GPa (14.9 Msi).
What is Ti Grade 3 used for?
- aircraft structural sheet
- pressure vessels
- cryogenic tanks
- marine components
Advantages
- High electrical conductivity — 3.1 % IACS, better than 75% of titanium grades
Limitations
- High embodied carbon — 48 kg CO₂/kg, worse than 95% of titanium grades
Ti Grade 3 properties
Typical room-temperature values for Ti Grade 3-ANN; bars are the position among titanium grades.
Physical3
Ti Grade 3 has a density of 4.51 g/cm³ (0.163 lb/in³), heavier than 57% of titanium grades. It melts at 1,660°C (3,020 °F).
Mechanical16
Ti Grade 3 has a yield strength of 420 MPa (60.9 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 68% of titanium grades. Elongation at break is 20% and the elastic modulus is 103 GPa (14.9 Msi).
Thermal6
Ti Grade 3 is rated for continuous service to 300°C (572 °F). It conducts heat at 16.4 W/m·K (9.48 BTU/hr·ft·°F), better than 71% of titanium grades. Thermal expansion is 8.6 µm/m·K (4.78 µin/in·°F).
Electrical3
Ti Grade 3 conducts electricity at 3.1 % IACS, better than 75% of titanium grades.
Chemical & Environmental3
Corrosion resistance is excellent (92/100), better than 53% of titanium grades.
Sustainability4
Producing a kilogram of Ti Grade 3 takes about 690 MJ of energy and emits 48 kg of CO₂ — more than 57% of titanium grades. Typical recycled content is 25%.
Manufacturability8
Ti Grade 3's machinability is poor (30/100, better than 64% of titanium grades); weldability excellent (85/100); formability good (55/100).
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 Grade 3 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Ti Grade 3
Is Ti Grade 3 easy to machine?
Machine at low surface speed with high feed, sharp uncoated-carbide or PVD tooling and flood coolant; never dwell — Ti work-hardens, galls and chips ignite as fine swarf.
Can Ti Grade 3 be welded?
Excellent GTAW/plasma/EBW weldability with argon torch, trailing and back purge; keep O/N/H pickup low, weld bead must stay silver-straw, no filler needed for thin sheet (ERTi-3 otherwise).
Can Ti Grade 3 be formed, bent or molded?
Cold form with generous bend radii (≈3–4 t) and allow for high springback; warm forming at 200–400 °C markedly improves formability over the higher-oxygen Grade 3.
Ti Grade 3 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 |
|---|---|---|
| Nmax per ASTM B265 | ≤ 0.05 | 0.02 |
| C | ≤ 0.08 | 0.02 |
| Hmax; 0.0125 for tube/bar in some forms | ≤ 0.02 | 0.01 |
| Fe | ≤ 0.3 | 0.2 |
| Omax; principal strengthener vs Grade 2 | ≤ 0.35 | 0.28 |
| Residuals (each)max each | ≤ 0.1 | |
| Residuals (total)max total | ≤ 0.4 | |
| Ti | balance |
What surface finishes work on Ti Grade 3?
Pickle in HNO₃/HF to remove alpha case and scale, then anodize (ASTM F86 / AMS 2488) for colour or wear; electropolishing and mechanical polishing both give good results — avoid iron contamination from steel tooling.
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 Grade 3 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- R50550
- EN / DIN / Werkstoff-Nr.
- 3.7065
- GB (China)
- TA3
- JIS
- Class 3
How much does Ti Grade 3 cost?
Ti Grade 3 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 Grade 3 — frequently asked
What is Ti Grade 3 used for?
Ti Grade 3 is typically used for aircraft structural sheet, pressure vessels, cryogenic tanks and marine components. In short: strongest common CP grade; higher strength than Grade 2; still readily weldable.
What is the yield strength of Ti Grade 3?
Ti Grade 3 has a typical yield strength of 420 MPa (60.9 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 68% of titanium grades. Strength varies by condition: see the 4 listed tempers.
Is Ti Grade 3 easy to machine?
Not especially — machinability is rated poor (30/100, better than 64% of titanium grades). Machine at low surface speed with high feed, sharp uncoated-carbide or PVD tooling and flood coolant; never dwell — Ti work-hardens, galls and chips ignite as fine swarf.
Can Ti Grade 3 be welded?
Yes — weldability is rated excellent (85/100). Excellent GTAW/plasma/EBW weldability with argon torch, trailing and back purge; keep O/N/H pickup low, weld bead must stay silver-straw, no filler needed for thin sheet (ERTi-3 otherwise).
What surface finishes work on Ti Grade 3?
Pickle in HNO₃/HF to remove alpha case and scale, then anodize (ASTM F86 / AMS 2488) for colour or wear; electropolishing and mechanical polishing both give good results — avoid iron contamination from steel tooling.
Can Ti Grade 3 be formed, bent or molded?
Cold form with generous bend radii (≈3–4 t) and allow for high springback; warm forming at 200–400 °C markedly improves formability over the higher-oxygen Grade 3.
What is the maximum service temperature of Ti Grade 3?
Ti Grade 3 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 Grade 3-ANN and Ti Grade 3-CW?
ANN is the default condition — default stocked condition for ASTM B265 plate/sheet and B348 bar; best balance of strength, ductility and weldability. CW: pick for cold-drawn bar, wire and strip where higher strength and straightness matter more than ductility. Yield strength is 420 MPa in ANN versus 550 MPa in CW.
How much does Ti Grade 3 cost?
Ti Grade 3 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 B265 – Titanium and Titanium Alloy Strip, Sheet, and Plate — ASTM International (2020)
- ASTM B348 – Titanium and Titanium Alloy Bars and Billets — ASTM International (2021)
- ASTM B338 – Seamless and Welded Titanium Tubes for Condensers and Heat Exchangers — ASTM International (2022)
- ASTM F67 – Unalloyed Titanium for Surgical Implant Applications — ASTM International (2017)
- ASM Handbook Vol.2 – Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol.13B – Corrosion: Materials — ASM International (2005)
- Commercially Pure Titanium Grades 1–4 datasheet — TIMET / VSMPO (2021)
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.