Titanium Ti-5Al-2.5Fe-CDA vs Ti-5Al-2.5Fe-STA
Titanium · Ti-5Al-2.5Fe temper comparison
Ti-5Al-2.5Fe-CDA and Ti-5Al-2.5Fe-STA are two conditions of the same titanium grade, Ti-5Al-2.5Fe: CDA (cold drawn + stress relieved bar/wire) versus STA (solution treated and aged). The chemistry is identical, so every difference below comes from the condition. Both yield at about 960 MPa — the mechanical properties are the same, and the difference is in how the stock is processed and what it is certified to (cold drawn + stress relieved bar/wire versus solution treated and aged). Ti-5Al-2.5Fe-STA is harder — 37 HRC against 35 HRC for Ti-5Al-2.5Fe-CDA — which matters for wear surfaces and threads. On the shop floor, Ti-5Al-2.5Fe-CDA welds better (good vs fair).
Ti-5Al-2.5Fe-CDAChoose it when it will be welded.
Ti-5Al-2.5Fe-STAChoose it when surface hardness matters.
Ti-5Al-2.5Fe-CDA vs Ti-5Al-2.5Fe-STA: 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.
Ti-5Al-2.5Fe-CDATi-5Al-2.5Fe-STA
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
Hardness, Vickers
Same in both: Shear Modulus 42 GPa6.1 Msi · Bulk Modulus 110 GPa16 Msi · Poisson's Ratio 0.33 · Reduction in Area 30% · Fracture Toughness (K_IC) 55 MPa·√m50.1 ksi·√in
Physical
Density and transition temperatures.
Same in both: Density 4.45 g/cm³0.16 lb/in³ · Melting Point (Solidus) 1,600°C2,912 °F · Liquidus Temperature 1,650°C3,002 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: Specific Heat Capacity 540 J/kg·K0.13 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 9.5 µm/m·K5.3 µin/in·°F · Latent Heat of Fusion 365 J/g157 BTU/lb · Max Service Temperature (continuous) 300°C572 °F · Min Service Temperature -250°C-418 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Same in both: Electrical Conductivity 1.1 % IACS
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
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Same in both: Castability 35 / 100 · Brazeability / Solderability 40 / 100 · Polishability 80 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 700 MJ/kg300,946 BTU/lb · Embodied Carbon (primary production) 42 kg CO₂/kg · Embodied Water 500 L/kg59.9 gal/lb · Typical Recycled Content 15%
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.
Ti-5Al-2.5Fe-CDA vs Ti-5Al-2.5Fe-STA — frequently asked
What is the difference between Ti-5Al-2.5Fe-CDA and Ti-5Al-2.5Fe-STA?
Ti-5Al-2.5Fe-CDA and Ti-5Al-2.5Fe-STA are two conditions of the same titanium grade, Ti-5Al-2.5Fe: CDA (cold drawn + stress relieved bar/wire) versus STA (solution treated and aged). The chemistry is identical, so every difference below comes from the condition. Both yield at about 960 MPa — the mechanical properties are the same, and the difference is in how the stock is processed and what it is certified to (cold drawn + stress relieved bar/wire versus solution treated and aged).
Which condition does FabDigit quote by default, CDA or STA?
Annealed is the default Ti-5Al-2.5Fe condition in the FabDigit quote flow (neither CDA nor STA). The other condition is available on request or by drawing note — specify it in the material field or the part notes and the quote is priced for it.
Which welds better, Ti-5Al-2.5Fe-CDA or Ti-5Al-2.5Fe-STA?
Ti-5Al-2.5Fe-CDA. Its weldability rates good (60/100) against fair (50/100) for Ti-5Al-2.5Fe-STA.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Ti-5Al-2.5Fe-CDA and Ti-5Al-2.5Fe-STA 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.