Titanium IMI 829 AB-STA vs IMI 829-ANN
Titanium · IMI 829 temper comparison
IMI 829 AB-STA and IMI 829-ANN are two conditions of the same titanium grade, IMI 829: AB-STA (α+β STA) versus ANN (annealed). The chemistry is identical, so every difference below comes from the condition. IMI 829 AB-STA is the stronger of the two: yield strength 890 MPa (129 ksi) against 820 MPa (119 ksi) for IMI 829-ANN, about 9% more; tensile strength follows at 1,000 MPa (145 ksi) vs 930 MPa (135 ksi). IMI 829 AB-STA is harder — 323 HB against 295 HB for IMI 829-ANN — which matters for wear surfaces and threads.
IMI 829 AB-STAChoose it when strength drives the design, or when surface hardness matters.
IMI 829 AB-STA vs IMI 829-ANN: 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)
Reduction in Area
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Hardness, Brinell
Hardness, Rockwell C
Hardness, Vickers
Same in both: Shear Modulus 45 GPa6.5 Msi · Bulk Modulus 110 GPa16 Msi · Poisson's Ratio 0.32 · Elongation at Break 13% · Charpy V-Notch Impact (RT) 19 J14 ft·lbf
Physical
Density and transition temperatures.
Same in both: Density 4.54 g/cm³0.16 lb/in³ · Melting Point (Solidus) 1,550°C2,822 °F · Liquidus Temperature 1,630°C2,966 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 530 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 390 J/g168 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 1.1 % IACS · Electrical Resistivity 1.6×10⁻⁶ Ω·m63 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.1 V · Corrosion Resistance 85 / 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 30 / 100 · Brazeability / Solderability 40 / 100 · Polishability 65 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 700 MJ/kg300,946 BTU/lb · Embodied Carbon (primary production) 43 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.
IMI 829 AB-STA vs IMI 829-ANN — frequently asked
Is IMI 829 AB-STA stronger than IMI 829-ANN?
Yes. IMI 829 AB-STA has a typical yield strength of 890 MPa (129 ksi) against 820 MPa (119 ksi) for IMI 829-ANN — about 9% more. Tensile strength is 1,000 MPa (145 ksi) vs 930 MPa (135 ksi).
Which condition does FabDigit quote by default, AB-STA or ANN?
BETA-STA is the default IMI 829 condition in the FabDigit quote flow (neither AB-STA nor ANN). 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, IMI 829 AB-STA or IMI 829-ANN?
IMI 829-ANN. Its weldability rates fair (50/100) against fair (45/100) for IMI 829 AB-STA.
Ready to make it?
Upload a CAD file and FabDigit prices the part in IMI 829 AB-STA and IMI 829-ANN 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.