Copper Alloy C44500-H01 vs C44500-O61
Copper Alloy · C44500 temper comparison
C44500-H01 and C44500-O61 are two conditions of the same copper alloy grade, C44500: H01 (quarter hard) versus O61 (annealed). The chemistry is identical, so every difference below comes from the condition. C44500-H01 is the stronger of the two: yield strength 275 MPa (39.9 ksi) against 124 MPa (18 ksi) for C44500-O61, about 122% more; tensile strength follows at 395 MPa (57.3 ksi) vs 331 MPa (48 ksi). In exchange, C44500-O61 is the more ductile: elongation 65% versus 30% for C44500-H01, and C44500-H01 is harder (95 HB vs 60 HB). C44500-O61 runs hotter in service (200°C vs 150°C continuous).
C44500-H01Choose it when strength drives the design.
C44500-O61Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C44500-H01 vs C44500-O61: 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.
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, Vickers
Same in both: Elastic (Young's) Modulus 110 GPa16 Msi · Shear Modulus 41 GPa5.9 Msi · Bulk Modulus 112 GPa16.2 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 8.53 g/cm³0.31 lb/in³ · Melting Point (Solidus) 900°C1,652 °F · Liquidus Temperature 935°C1,715 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 111 W/m·K64.1 BTU/hr·ft·°F · Specific Heat Capacity 377 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 20.2 µm/m·K11.2 µin/in·°F · Latent Heat of Fusion 170 J/g73.1 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 25 % IACS · Electrical Resistivity 6.9×10⁻⁸ Ω·m2.72 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.28 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Same in both: Weldability 55 / 100 · Brazeability / Solderability 88 / 100 · Polishability 75 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 58 MJ/kg24,936 BTU/lb · Embodied Carbon (primary production) 3.8 kg CO₂/kg · Embodied Water 300 L/kg35.9 gal/lb · Typical Recycled Content 40%
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.
C44500-H01 vs C44500-O61 — frequently asked
Is C44500-H01 stronger than C44500-O61?
Yes. C44500-H01 has a typical yield strength of 275 MPa (39.9 ksi) against 124 MPa (18 ksi) for C44500-O61 — about 122% more. Tensile strength is 395 MPa (57.3 ksi) vs 331 MPa (48 ksi).
Which condition does FabDigit quote by default, H01 or O61?
O61 is the default C44500 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.
When should I choose C44500-H01 over C44500-O61?
Pick C44500-H01 when strength drives the design. Pick C44500-O61 when the part is bent, formed or impact-loaded, or when the part sees heat.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C44500-H01 and C44500-O61 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.