Refractory Metal Nuclear Grade Hafnium (R1)-ANN vs Nuclear Grade Hafnium (R1)-HW
Refractory Metal · Nuclear Grade Hafnium (R1) temper comparison
Nuclear Grade Hafnium (R1)-ANN and Nuclear Grade Hafnium (R1)-HW are two conditions of the same refractory metal grade, Nuclear Grade Hafnium (R1): ANN (annealed) versus HW (hot Worked). The chemistry is identical, so every difference below comes from the condition. Nuclear Grade Hafnium (R1)-HW is the stronger of the two: yield strength 285 MPa (41.3 ksi) against 240 MPa (34.8 ksi) for Nuclear Grade Hafnium (R1)-ANN, about 19% more; tensile strength follows at 480 MPa (69.6 ksi) vs 445 MPa (64.5 ksi). In exchange, Nuclear Grade Hafnium (R1)-ANN is the more ductile: elongation 25% versus 20% for Nuclear Grade Hafnium (R1)-HW, and Nuclear Grade Hafnium (R1)-HW is harder (175 HB vs 160 HB).
Nuclear Grade Hafnium (R1)-ANNChoose it when the part is bent, formed or impact-loaded.
Nuclear Grade Hafnium (R1)-HWChoose it when strength drives the design.
Nuclear Grade Hafnium (R1)-ANN vs Nuclear Grade Hafnium (R1)-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.
Nuclear Grade Hafnium (R1)-ANNNuclear Grade Hafnium (R1)-HW
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Shear Strength
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 140 GPa20.3 Msi · Shear Modulus 30 GPa4.4 Msi · Bulk Modulus 110 GPa16 Msi · Poisson's Ratio 0.26
Physical
Density and transition temperatures.
Same in both: Density 13.31 g/cm³0.48 lb/in³ · Melting Point (Solidus) 2,233°C4,051 °F · Liquidus Temperature 2,233°C4,051 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 23 W/m·K13.3 BTU/hr·ft·°F · Specific Heat Capacity 144 J/kg·K0.03 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 5.9 µm/m·K3.3 µin/in·°F · Latent Heat of Fusion 134 J/g57.6 BTU/lb · Max Service Temperature (continuous) 400°C752 °F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 5.2 % IACS · Electrical Resistivity 3.31×10⁻⁷ Ω·m13 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.1 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Formability (cold)
Same in both: Machinability 30 / 100 · Machinability Rating (AISI 1212 = 100 %) 25% · Weldability 60 / 100 · Castability 30 / 100 · Brazeability / Solderability 35 / 100 · Polishability 65 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 1,400 MJ/kg601,892 BTU/lb · Embodied Carbon (primary production) 95 kg CO₂/kg
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.
Nuclear Grade Hafnium (R1)-ANN vs Nuclear Grade Hafnium (R1)-HW — frequently asked
Is Nuclear Grade Hafnium (R1)-HW stronger than Nuclear Grade Hafnium (R1)-ANN?
Yes. Nuclear Grade Hafnium (R1)-HW has a typical yield strength of 285 MPa (41.3 ksi) against 240 MPa (34.8 ksi) for Nuclear Grade Hafnium (R1)-ANN — about 19% more. Tensile strength is 480 MPa (69.6 ksi) vs 445 MPa (64.5 ksi).
Which condition does FabDigit quote by default, ANN or HW?
ANN is the default Nuclear Grade Hafnium (R1) 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 Nuclear Grade Hafnium (R1)-ANN over Nuclear Grade Hafnium (R1)-HW?
Pick Nuclear Grade Hafnium (R1)-ANN when the part is bent, formed or impact-loaded. Pick Nuclear Grade Hafnium (R1)-HW when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Nuclear Grade Hafnium (R1)-ANN and Nuclear Grade Hafnium (R1)-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.