Precious Metal AgCu-Eutectic-H04 vs AgCu-Eutectic-O
Precious Metal · AgCu-Eutectic temper comparison
AgCu-Eutectic-H04 and AgCu-Eutectic-O are two conditions of the same precious metal grade, AgCu-Eutectic: H04 (full hard) versus O (annealed). The chemistry is identical, so every difference below comes from the condition. AgCu-Eutectic-H04 is the stronger of the two: yield strength 480 MPa (69.6 ksi) against 130 MPa (18.9 ksi) for AgCu-Eutectic-O, about 3.7 times as much; tensile strength follows at 550 MPa (79.8 ksi) vs 300 MPa (43.5 ksi). In exchange, AgCu-Eutectic-O is the more ductile: elongation 30% versus 3% for AgCu-Eutectic-H04, and AgCu-Eutectic-H04 is harder (138 HB vs 65 HB). On the shop floor, AgCu-Eutectic-H04 machines more easily (good vs fair).
AgCu-Eutectic-H04Choose it when strength drives the design, or when the part is machined in volume.
AgCu-Eutectic-OChoose it when the part is bent, formed or impact-loaded.
AgCu-Eutectic-H04 vs AgCu-Eutectic-O: 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.
AgCu-Eutectic-H04AgCu-Eutectic-O
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 85 GPa12.3 Msi · Shear Modulus 32 GPa4.6 Msi · Bulk Modulus 108 GPa15.7 Msi · Poisson's Ratio 0.36 · Reduction in Area 45% · Shear Strength 190 MPa27.6 ksi
Physical
Density and transition temperatures.
Same in both: Density 9.9 g/cm³0.36 lb/in³ · Melting Point (Solidus) 779°C1,434 °F · Liquidus Temperature 780°C1,436 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 355 W/m·K205 BTU/hr·ft·°F · Specific Heat Capacity 275 J/kg·K0.07 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 19 µm/m·K10.6 µin/in·°F · Latent Heat of Fusion 140 J/g60.2 BTU/lb · Max Service Temperature (continuous) 300°C572 °F · Min Service Temperature -200°C-328 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Same in both: Electrical Resistivity 2×10⁻⁸ Ω·m0.787 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.05 V · Corrosion Resistance 75 / 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 %) 50% · Weldability 40 / 100 · Castability 85 / 100 · Brazeability / Solderability 98 / 100 · Polishability 88 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 1,130 MJ/kg485,813 BTU/lb · Embodied Carbon (primary production) 80 kg CO₂/kg · Embodied Water 90,000 L/kg10,784 gal/lb · Typical Recycled Content 45%
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.
AgCu-Eutectic-H04 vs AgCu-Eutectic-O — frequently asked
Is AgCu-Eutectic-H04 stronger than AgCu-Eutectic-O?
Yes. AgCu-Eutectic-H04 has a typical yield strength of 480 MPa (69.6 ksi) against 130 MPa (18.9 ksi) for AgCu-Eutectic-O — about 3.7 times as much. Tensile strength is 550 MPa (79.8 ksi) vs 300 MPa (43.5 ksi).
Which condition does FabDigit quote by default, H04 or O?
O is the default AgCu-Eutectic 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, AgCu-Eutectic-H04 or AgCu-Eutectic-O?
AgCu-Eutectic-H04. Its machinability rates good (65/100) against fair (50/100) for AgCu-Eutectic-O.
Ready to make it?
Upload a CAD file and FabDigit prices the part in AgCu-Eutectic-H04 and AgCu-Eutectic-O 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.