Titanium Ti-12Mo-6Zr-2Fe HW-A vs Ti-12Mo-6Zr-2Fe-ST
Titanium · Ti-12Mo-6Zr-2Fe temper comparison
Ti-12Mo-6Zr-2Fe HW-A and Ti-12Mo-6Zr-2Fe-ST are two conditions of the same titanium grade, Ti-12Mo-6Zr-2Fe: HW-A (hot worked and annealed) versus ST (solution annealed). The chemistry is identical, so every difference below comes from the condition. Ti-12Mo-6Zr-2Fe-ST is the stronger of the two: yield strength 990 MPa (144 ksi) against 930 MPa (135 ksi) for Ti-12Mo-6Zr-2Fe HW-A, about 6% more; tensile strength follows at 1,060 MPa (154 ksi) vs 1,000 MPa (145 ksi). Ti-12Mo-6Zr-2Fe-ST is harder — 32 HRC against 30 HRC for Ti-12Mo-6Zr-2Fe HW-A — which matters for wear surfaces and threads.
Ti-12Mo-6Zr-2Fe-STChoose it when strength drives the design, or when surface hardness matters.
Ti-12Mo-6Zr-2Fe HW-A vs Ti-12Mo-6Zr-2Fe-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-12Mo-6Zr-2Fe HW-ATi-12Mo-6Zr-2Fe-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)
Hardness, Rockwell C
Hardness, Vickers
Same in both: Shear Modulus 30 GPa4.4 Msi · Bulk Modulus 90 GPa13.1 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 5 g/cm³0.18 lb/in³ · Melting Point (Solidus) 1,620°C2,948 °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 6.8 W/m·K3.9 BTU/hr·ft·°F · Specific Heat Capacity 500 J/kg·K0.12 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 9 µm/m·K5 µin/in·°F · Max Service Temperature (continuous) 250°C482 °F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: 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 %)
Formability (cold)
Same in both: Weldability 60 / 100 · Castability 35 / 100 · Brazeability / Solderability 40 / 100 · Polishability 80 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 660 MJ/kg283,749 BTU/lb · Embodied Carbon (primary production) 42 kg CO₂/kg · Embodied Water 600 L/kg71.9 gal/lb · Typical Recycled Content 10%
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-12Mo-6Zr-2Fe HW-A vs Ti-12Mo-6Zr-2Fe-ST — frequently asked
Is Ti-12Mo-6Zr-2Fe-ST stronger than Ti-12Mo-6Zr-2Fe HW-A?
Yes. Ti-12Mo-6Zr-2Fe-ST has a typical yield strength of 990 MPa (144 ksi) against 930 MPa (135 ksi) for Ti-12Mo-6Zr-2Fe HW-A — about 6% more. Tensile strength is 1,060 MPa (154 ksi) vs 1,000 MPa (145 ksi).
Which condition does FabDigit quote by default, HW-A or ST?
ST is the default Ti-12Mo-6Zr-2Fe 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.
When should I choose Ti-12Mo-6Zr-2Fe HW-A over Ti-12Mo-6Zr-2Fe-ST?
Pick Ti-12Mo-6Zr-2Fe-ST when strength drives the design, or when surface hardness matters.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Ti-12Mo-6Zr-2Fe HW-A and Ti-12Mo-6Zr-2Fe-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.