Titanium Ti-6Al-2Sn-4Zr-6Mo Annealed vs Ti-6Al-2Sn-4Zr-6Mo-ST
Titanium · Ti-6Al-2Sn-4Zr-6Mo temper comparison
Ti-6Al-2Sn-4Zr-6Mo Annealed and Ti-6Al-2Sn-4Zr-6Mo-ST are two conditions of the same titanium grade, Ti-6Al-2Sn-4Zr-6Mo: Annealed versus ST (solution annealed). The chemistry is identical, so every difference below comes from the condition. Ti-6Al-2Sn-4Zr-6Mo Annealed is the stronger of the two: yield strength 950 MPa (138 ksi) against 900 MPa (131 ksi) for Ti-6Al-2Sn-4Zr-6Mo-ST, about 6% more; tensile strength follows at 1,030 MPa (149 ksi) vs 970 MPa (141 ksi). In exchange, Ti-6Al-2Sn-4Zr-6Mo-ST is the more ductile: elongation 15% versus 13% for Ti-6Al-2Sn-4Zr-6Mo Annealed, and Ti-6Al-2Sn-4Zr-6Mo Annealed is harder (34 HRC vs 32 HRC). Ti-6Al-2Sn-4Zr-6Mo Annealed runs hotter in service (400°C vs 315°C continuous). On the shop floor, Ti-6Al-2Sn-4Zr-6Mo-ST welds better (fair vs poor).
Ti-6Al-2Sn-4Zr-6Mo AnnealedChoose it when strength drives the design, or when the part sees heat.
Ti-6Al-2Sn-4Zr-6Mo-STChoose it when the part is bent, formed or impact-loaded, or when it will be welded.
Ti-6Al-2Sn-4Zr-6Mo Annealed vs Ti-6Al-2Sn-4Zr-6Mo-ST: 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-6Al-2Sn-4Zr-6Mo AnnealedTi-6Al-2Sn-4Zr-6Mo-ST
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 43 GPa6.2 Msi · Bulk Modulus 112 GPa16.2 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 4.65 g/cm³0.17 lb/in³ · 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
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 480 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 8 µm/m·K4.4 µin/in·°F · 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).
Same in both: Galvanic Potential (seawater, vs SCE) -0.1 V · Corrosion Resistance 88 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Same in both: Machinability 18 / 100 · Brazeability / Solderability 35 / 100 · Polishability 70 / 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 1,000 L/kg120 gal/lb · Typical Recycled Content 25%
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-2Sn-4Zr-6Mo Annealed vs Ti-6Al-2Sn-4Zr-6Mo-ST — frequently asked
Is Ti-6Al-2Sn-4Zr-6Mo Annealed stronger than Ti-6Al-2Sn-4Zr-6Mo-ST?
Yes. Ti-6Al-2Sn-4Zr-6Mo Annealed has a typical yield strength of 950 MPa (138 ksi) against 900 MPa (131 ksi) for Ti-6Al-2Sn-4Zr-6Mo-ST — about 6% more. Tensile strength is 1,030 MPa (149 ksi) vs 970 MPa (141 ksi).
Which condition does FabDigit quote by default, Annealed or ST?
STA is the default Ti-6Al-2Sn-4Zr-6Mo condition in the FabDigit quote flow (neither Annealed nor ST). 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-6Al-2Sn-4Zr-6Mo Annealed or Ti-6Al-2Sn-4Zr-6Mo-ST?
Ti-6Al-2Sn-4Zr-6Mo-ST. Its weldability rates fair (40/100) against poor (30/100) for Ti-6Al-2Sn-4Zr-6Mo Annealed.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Ti-6Al-2Sn-4Zr-6Mo Annealed and Ti-6Al-2Sn-4Zr-6Mo-ST 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.