Precious Metal B522 Class II 1/2H vs B522 Class II-ANN
Precious Metal · B522 Class II temper comparison
B522 Class II 1/2H and B522 Class II-ANN are two conditions of the same precious metal grade, B522 Class II: 1/2H (half hard) versus ANN (annealed). The chemistry is identical, so every difference below comes from the condition. B522 Class II 1/2H is the stronger of the two: yield strength 420 MPa (60.9 ksi) against 180 MPa (26.1 ksi) for B522 Class II-ANN, about 133% more; tensile strength follows at 560 MPa (81.2 ksi) vs 390 MPa (56.6 ksi). In exchange, B522 Class II-ANN is the more ductile: elongation 30% versus 10% for B522 Class II 1/2H, and B522 Class II 1/2H is harder (155 HV vs 95 HV). B522 Class II-ANN runs hotter in service (400°C vs 250°C continuous). On the shop floor, B522 Class II 1/2H machines more easily (50 vs 40 out of 100).
B522 Class II 1/2HChoose it when strength drives the design, or when the part is machined in volume.
B522 Class II-ANNChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
B522 Class II 1/2H vs B522 Class II-ANN: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all precious 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 precious 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.
B522 Class II 1/2HB522 Class II-ANN
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Vickers
Same in both: Shear Modulus 32 GPa4.6 Msi · Bulk Modulus 145 GPa21 Msi · Poisson's Ratio 0.4 · Reduction in Area 65% · Hardness, Brinell 90 HB
Physical
Density and transition temperatures.
Same in both: Density 16 g/cm³0.58 lb/in³ · Melting Point (Solidus) 1,035°C1,895 °F · Liquidus Temperature 1,065°C1,949 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 50 W/m·K28.9 BTU/hr·ft·°F · Specific Heat Capacity 150 J/kg·K0.04 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 15 µm/m·K8.3 µin/in·°F · Latent Heat of Fusion 75 J/g32.2 BTU/lb · Min Service Temperature -200°C-328 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Same in both: Electrical Resistivity 2.15×10⁻⁷ Ω·m8.46 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) 0.25 V · Corrosion Resistance 97 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Formability (cold)
Same in both: Machinability Rating (AISI 1212 = 100 %) 35% · Weldability 60 / 100 · Castability 70 / 100 · Brazeability / Solderability 90 / 100 · Polishability 92 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 180,000 MJ/kg7.74×10⁷ BTU/lb · Embodied Carbon (primary production) 12,000 kg CO₂/kg · Embodied Water 150,000 L/kg17,974 gal/lb · Typical Recycled Content 85%
Strength versus weight
Yield strength against density for every precious metal grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
B522 Class II 1/2H vs B522 Class II-ANN — frequently asked
Is B522 Class II 1/2H stronger than B522 Class II-ANN?
Yes. B522 Class II 1/2H has a typical yield strength of 420 MPa (60.9 ksi) against 180 MPa (26.1 ksi) for B522 Class II-ANN — about 133% more. Tensile strength is 560 MPa (81.2 ksi) vs 390 MPa (56.6 ksi).
Which condition does FabDigit quote by default, 1/2H or ANN?
ANN is the default B522 Class II 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, B522 Class II 1/2H or B522 Class II-ANN?
B522 Class II 1/2H, by a small margin. Both rate fair for machinability — 50/100 against 40/100 for B522 Class II-ANN.
Ready to make it?
Upload a CAD file and FabDigit prices the part in B522 Class II 1/2H and B522 Class II-ANN 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.