Refractory Metal Nuclear Grade Hafnium (R1)-ANN vs Nuclear Grade Hafnium (R1)-CW
Refractory Metal · Nuclear Grade Hafnium (R1) temper comparison
Nuclear Grade Hafnium (R1)-ANN and Nuclear Grade Hafnium (R1)-CW are two conditions of the same refractory metal grade, Nuclear Grade Hafnium (R1): ANN (annealed) versus CW (cold worked). The chemistry is identical, so every difference below comes from the condition. Nuclear Grade Hafnium (R1)-CW is the stronger of the two: yield strength 550 MPa (79.8 ksi) against 240 MPa (34.8 ksi) for Nuclear Grade Hafnium (R1)-ANN, about 129% more; tensile strength follows at 650 MPa (94.3 ksi) vs 445 MPa (64.5 ksi). In exchange, Nuclear Grade Hafnium (R1)-ANN is the more ductile: elongation 25% versus 8% for Nuclear Grade Hafnium (R1)-CW, and Nuclear Grade Hafnium (R1)-CW is harder (235 HB vs 160 HB). Nuclear Grade Hafnium (R1)-ANN runs hotter in service (400°C vs 300°C continuous). On the shop floor, Nuclear Grade Hafnium (R1)-ANN welds better (good vs fair).
Nuclear Grade Hafnium (R1)-ANNChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Nuclear Grade Hafnium (R1)-CWChoose it when strength drives the design.
Nuclear Grade Hafnium (R1)-ANN vs Nuclear Grade Hafnium (R1)-CW: 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)-CW
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.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: 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 · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
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.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Same in both: 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)-CW — frequently asked
Is Nuclear Grade Hafnium (R1)-CW stronger than Nuclear Grade Hafnium (R1)-ANN?
Yes. Nuclear Grade Hafnium (R1)-CW has a typical yield strength of 550 MPa (79.8 ksi) against 240 MPa (34.8 ksi) for Nuclear Grade Hafnium (R1)-ANN — about 129% more. Tensile strength is 650 MPa (94.3 ksi) vs 445 MPa (64.5 ksi).
Which condition does FabDigit quote by default, ANN or CW?
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.
Which is easier to machine, Nuclear Grade Hafnium (R1)-ANN or Nuclear Grade Hafnium (R1)-CW?
Nuclear Grade Hafnium (R1)-CW. Its machinability rates fair (35/100) against poor (30/100) for Nuclear Grade Hafnium (R1)-ANN; for welding the order is Nuclear Grade Hafnium (R1)-ANN first (good, 60/100) then Nuclear Grade Hafnium (R1)-CW (fair, 50/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Nuclear Grade Hafnium (R1)-ANN and Nuclear Grade Hafnium (R1)-CW 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.