Copper Alloy CuAg0.04-HR vs CuAg0.04-M
Copper Alloy · CuAg0.04 temper comparison
CuAg0.04-HR and CuAg0.04-M are two conditions of the same copper alloy grade, CuAg0.04: HR (hot rolled) versus M (thermomechanically controlled processed). The chemistry is identical, so every difference below comes from the condition. CuAg0.04-HR is the stronger of the two: yield strength 290 MPa (42.1 ksi) against 60 MPa (8.7 ksi) for CuAg0.04-M, about 4.8 times as much; tensile strength follows at 340 MPa (49.3 ksi) vs 180 MPa (26.1 ksi). In exchange, CuAg0.04-M is the more ductile: elongation 35% versus 10% for CuAg0.04-HR, and CuAg0.04-HR is harder (99 HB vs 42 HB). CuAg0.04-HR is stiffer (120 GPa vs 110 GPa) and CuAg0.04-HR runs hotter in service (250°C vs 200°C continuous).
CuAg0.04-HRChoose it when strength drives the design, or when the part sees heat.
CuAg0.04-MChoose it when the part is bent, formed or impact-loaded.
CuAg0.04-HR vs CuAg0.04-M: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all copper 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 copper 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.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Shear Modulus 45 GPa6.5 Msi · Bulk Modulus 140 GPa20.3 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 8.94 g/cm³0.32 lb/in³ · Melting Point (Solidus) 1,065°C1,949 °F · Liquidus Temperature 1,083°C1,981 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 388 W/m·K224 BTU/hr·ft·°F · Specific Heat Capacity 385 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 17.1 µm/m·K9.5 µin/in·°F · Latent Heat of Fusion 205 J/g88.1 BTU/lb · Min Service Temperature -200°C-328 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 99 % IACS · Electrical Resistivity 1.74×10⁻⁸ Ω·m0.685 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.2 V · Corrosion Resistance 65 / 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 45 / 100 · Brazeability / Solderability 92 / 100 · Polishability 80 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 57 MJ/kg24,506 BTU/lb · Embodied Carbon (primary production) 3.9 kg CO₂/kg · Embodied Water 280 L/kg33.6 gal/lb · Typical Recycled Content 35%
Strength versus weight
Yield strength against density for every copper alloy grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
CuAg0.04-HR vs CuAg0.04-M — frequently asked
Is CuAg0.04-HR stronger than CuAg0.04-M?
Yes. CuAg0.04-HR has a typical yield strength of 290 MPa (42.1 ksi) against 60 MPa (8.7 ksi) for CuAg0.04-M — about 4.8 times as much. Tensile strength is 340 MPa (49.3 ksi) vs 180 MPa (26.1 ksi).
Which condition does FabDigit quote by default, HR or M?
H04 is the default CuAg0.04 condition in the FabDigit quote flow (neither HR nor M). 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, CuAg0.04-HR or CuAg0.04-M?
CuAg0.04-HR, by a small margin. Both rate poor for machinability — 27/100 against 20/100 for CuAg0.04-M.
Ready to make it?
Upload a CAD file and FabDigit prices the part in CuAg0.04-HR and CuAg0.04-M 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.