Nickel Alloy Mu-metal ANN-MILL vs Mu-metal-CD
Nickel Alloy · Mu-metal temper comparison
Mu-metal ANN-MILL and Mu-metal-CD are two conditions of the same nickel alloy grade, Mu-metal: ANN-MILL (mill annealed) versus CD (cold drawn). The chemistry is identical, so every difference below comes from the condition. Mu-metal-CD is the stronger of the two: yield strength 680 MPa (98.6 ksi) against 280 MPa (40.6 ksi) for Mu-metal ANN-MILL, about 143% more; tensile strength follows at 830 MPa (120 ksi) vs 580 MPa (84.1 ksi). In exchange, Mu-metal ANN-MILL is the more ductile: elongation 35% versus 8% for Mu-metal-CD, and Mu-metal-CD is harder (213 HB vs 130 HB). Mu-metal ANN-MILL runs hotter in service (400°C vs 300°C continuous). On the shop floor, Mu-metal-CD machines more easily (fair vs poor).
Mu-metal ANN-MILLChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Mu-metal-CDChoose it when strength drives the design, or when the part is machined in volume.
Mu-metal ANN-MILL vs Mu-metal-CD: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all nickel alloy 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 nickel alloy 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
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 215 GPa31.2 Msi · Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 180 GPa26.1 Msi · Poisson's Ratio 0.3
Physical
Density and transition temperatures.
Same in both: Density 8.74 g/cm³0.32 lb/in³ · Melting Point (Solidus) 1,400°C2,552 °F · Liquidus Temperature 1,450°C2,642 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 31 W/m·K17.9 BTU/hr·ft·°F · Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 12.7 µm/m·K7.1 µin/in·°F · Latent Heat of Fusion 285 J/g123 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Same in both: Electrical Conductivity 3 % IACS
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.2 V · Corrosion Resistance 55 / 100
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 70 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 140 MJ/kg60,189 BTU/lb · Embodied Carbon (primary production) 10.5 kg CO₂/kg · Embodied Water 400 L/kg47.9 gal/lb · Typical Recycled Content 25%
Strength versus weight
Yield strength against density for every nickel alloy grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Mu-metal ANN-MILL vs Mu-metal-CD — frequently asked
Is Mu-metal-CD stronger than Mu-metal ANN-MILL?
Yes. Mu-metal-CD has a typical yield strength of 680 MPa (98.6 ksi) against 280 MPa (40.6 ksi) for Mu-metal ANN-MILL — about 143% more. Tensile strength is 830 MPa (120 ksi) vs 580 MPa (84.1 ksi).
Which condition does FabDigit quote by default, ANN-MILL or CD?
ANN-H2 is the default Mu-metal condition in the FabDigit quote flow (neither ANN-MILL nor CD). 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, Mu-metal ANN-MILL or Mu-metal-CD?
Mu-metal-CD. Its machinability rates fair (40/100) against poor (30/100) for Mu-metal ANN-MILL; for welding the order is Mu-metal ANN-MILL first (good, 55/100) then Mu-metal-CD (fair, 50/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Mu-metal ANN-MILL and Mu-metal-CD 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.