Titanium Ti-6Al-7Nb-ANN vs Ti-6Al-7Nb-STA
Titanium · Ti-6Al-7Nb temper comparison
Ti-6Al-7Nb-ANN and Ti-6Al-7Nb-STA are two conditions of the same titanium grade, Ti-6Al-7Nb: ANN (annealed) versus STA (solution treated and aged). The chemistry is identical, so every difference below comes from the condition. Ti-6Al-7Nb-STA is the stronger of the two: yield strength 1,020 MPa (148 ksi) against 900 MPa (131 ksi) for Ti-6Al-7Nb-ANN, about 13% more; tensile strength follows at 1,120 MPa (162 ksi) vs 1,000 MPa (145 ksi). In exchange, Ti-6Al-7Nb-ANN is the more ductile: elongation 13% versus 10% for Ti-6Al-7Nb-STA, and Ti-6Al-7Nb-STA is harder (337 HB vs 305 HB). On the shop floor, Ti-6Al-7Nb-ANN welds better (good vs fair).
Ti-6Al-7Nb-ANNChoose it when the part is bent, formed or impact-loaded, or when it will be welded.
Ti-6Al-7Nb-STAChoose it when strength drives the design.
Ti-6Al-7Nb-ANN vs Ti-6Al-7Nb-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.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
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 0.34
Physical
Density and transition temperatures.
Same in both: Density 4.52 g/cm³0.16 lb/in³ · Melting Point (Solidus) 1,600°C2,912 °F · Liquidus Temperature 1,680°C3,056 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 7 W/m·K4 BTU/hr·ft·°F · Specific Heat Capacity 470 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 9 µm/m·K5 µin/in·°F · Latent Heat of Fusion 360 J/g155 BTU/lb · Max Service Temperature (continuous) 350°C662 °F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 1.3 % IACS · Electrical Resistivity 1.3×10⁻⁶ Ω·m51.2 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.1 V · Corrosion Resistance 93 / 100
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 30 / 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) 45 kg CO₂/kg · Embodied Water 600 L/kg71.9 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-6Al-7Nb-ANN vs Ti-6Al-7Nb-STA — frequently asked
Is Ti-6Al-7Nb-STA stronger than Ti-6Al-7Nb-ANN?
Yes. Ti-6Al-7Nb-STA has a typical yield strength of 1,020 MPa (148 ksi) against 900 MPa (131 ksi) for Ti-6Al-7Nb-ANN — about 13% more. Tensile strength is 1,120 MPa (162 ksi) vs 1,000 MPa (145 ksi).
Which condition does FabDigit quote by default, ANN or STA?
ANN is the default Ti-6Al-7Nb condition in the FabDigit quote flow. 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 is easier to machine, Ti-6Al-7Nb-ANN or Ti-6Al-7Nb-STA?
Ti-6Al-7Nb-ANN, by a small margin. Both rate poor for machinability — 20/100 against 15/100 for Ti-6Al-7Nb-STA; for welding the order is Ti-6Al-7Nb-ANN first (good, 65/100) then Ti-6Al-7Nb-STA (fair, 50/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Ti-6Al-7Nb-ANN and Ti-6Al-7Nb-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.