Titanium IMI 550 vs Ti-6-22-22
Titanium · grade comparison
Titanium IMI 550 and Ti-6-22-22 are both titanium grades. Ti-6-22-22 is the stronger of the two: yield strength 1,160 MPa (168 ksi) against 1,050 MPa (152 ksi) for IMI 550, about 10% more; tensile strength follows at 1,240 MPa (180 ksi) vs 1,150 MPa (167 ksi). In exchange, IMI 550 is the more ductile: elongation 13% versus 10% for Ti-6-22-22, and Ti-6-22-22 is harder (38 HRC vs 36 HRC). IMI 550 runs hotter in service (400°C vs 315°C continuous). On the shop floor, Ti-6-22-22 welds better (fair vs poor).
IMI 550Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Ti-6-22-22Choose it when strength drives the design, or when it will be welded.
IMI 550 vs Ti-6-22-22: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all titanium grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all titanium grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Shear Modulus
Bulk Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Compressive Strength
Shear Strength
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
Hardness, Vickers
Same in both: Poisson's Ratio 0.32 · Fatigue Strength (Endurance Limit) 580 MPa84.1 ksi
Physical
Density and transition temperatures.
Density
Same in both: Melting Point (Solidus) 1,590°C2,894 °F · Liquidus Temperature 1,650°C3,002 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Same in both: Latent Heat of Fusion 365 J/g157 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.1 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Castability
Brazeability / Solderability
Polishability
Same in both: Machinability 16 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Water
Typical Recycled Content
Same in both: Embodied Energy (primary production) 650 MJ/kg279,450 BTU/lb · Embodied Carbon (primary production) 42 kg CO₂/kg
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Same in both: Thermal Shock Resistance Index 8
Strength versus weight
Yield strength against density for every titanium grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | IMI 550 | Ti-6-22-22 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 1 finish: Plasma Spray.
IMI 550 vs Ti-6-22-22 — frequently asked
Is Ti-6-22-22 stronger than IMI 550?
Yes. Ti-6-22-22 has a typical yield strength of 1,160 MPa (168 ksi) against 1,050 MPa (152 ksi) for IMI 550 — about 10% more. Tensile strength is 1,240 MPa (180 ksi) vs 1,150 MPa (167 ksi).
Which is cheaper, IMI 550 or Ti-6-22-22?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which welds better, IMI 550 or Ti-6-22-22?
Ti-6-22-22. Its weldability rates fair (45/100) against poor (25/100) for IMI 550.
Ready to make it?
Upload a CAD file and FabDigit prices the part in IMI 550 and Ti-6-22-22 side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.