Refractory Metal NbTi-ANN vs NbTi-HW
Refractory Metal · NbTi temper comparison
NbTi-ANN and NbTi-HW are two conditions of the same refractory metal grade, NbTi: ANN (annealed) versus HW (hot worked (extruded / forged) bar, as-worked). The chemistry is identical, so every difference below comes from the condition. NbTi-HW is the stronger of the two: yield strength 520 MPa (75.4 ksi) against 350 MPa (50.8 ksi) for NbTi-ANN, about 49% more; tensile strength follows at 720 MPa (104 ksi) vs 620 MPa (89.9 ksi). In exchange, NbTi-ANN is the more ductile: elongation 25% versus 18% for NbTi-HW, and NbTi-HW is harder (185 HB vs 160 HB).
NbTi-ANNChoose it when the part is bent, formed or impact-loaded.
NbTi-HWChoose it when strength drives the design.
NbTi-ANN vs NbTi-HW: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all refractory metal 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 refractory metal 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.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 65 GPa9.4 Msi · Shear Modulus 24 GPa3.5 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 6.05 g/cm³0.22 lb/in³ · Melting Point (Solidus) 1,900°C3,452 °F · Liquidus Temperature 2,020°C3,668 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 12 W/m·K6.9 BTU/hr·ft·°F · Specific Heat Capacity 350 J/kg·K0.08 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 8 µm/m·K4.4 µin/in·°F · Latent Heat of Fusion 290 J/g125 BTU/lb · Max Service Temperature (continuous) 400°C752 °F · Min Service Temperature -271°C-456 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 2.9 % IACS · Electrical Resistivity 6×10⁻⁷ Ω·m23.6 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 %)
Formability (cold)
Same in both: Weldability 45 / 100 · Castability 25 / 100 · Brazeability / Solderability 40 / 100 · Polishability 60 / 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 · Typical Recycled Content 10%
Strength versus weight
Yield strength against density for every refractory metal grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
NbTi-ANN vs NbTi-HW — frequently asked
Is NbTi-HW stronger than NbTi-ANN?
Yes. NbTi-HW has a typical yield strength of 520 MPa (75.4 ksi) against 350 MPa (50.8 ksi) for NbTi-ANN — about 49% more. Tensile strength is 720 MPa (104 ksi) vs 620 MPa (89.9 ksi).
Which condition does FabDigit quote by default, ANN or HW?
ANN is the default NbTi 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 NbTi-ANN over NbTi-HW?
Pick NbTi-ANN when the part is bent, formed or impact-loaded. Pick NbTi-HW when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in NbTi-ANN and NbTi-HW 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.