Copper Alloy C63600-H04 vs C63600-O61
Copper Alloy · C63600 temper comparison
C63600-H04 and C63600-O61 are two conditions of the same copper alloy grade, C63600: H04 (full hard) versus O61 (annealed). The chemistry is identical, so every difference below comes from the condition. C63600-H04 is the stronger of the two: yield strength 550 MPa (79.8 ksi) against 170 MPa (24.7 ksi) for C63600-O61, about 3.2 times as much; tensile strength follows at 640 MPa (92.8 ksi) vs 415 MPa (60.2 ksi). In exchange, C63600-O61 is the more ductile: elongation 45% versus 8% for C63600-H04, and C63600-H04 is harder (200 HB vs 105 HB). C63600-O61 runs hotter in service (300°C vs 180°C continuous). On the shop floor, C63600-H04 machines more easily (50 vs 35 out of 100).
C63600-H04Choose it when strength drives the design, or when the part is machined in volume.
C63600-O61Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C63600-H04 vs C63600-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
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Rockwell B
Same in both: Elastic (Young's) Modulus 117 GPa17 Msi · Shear Modulus 44 GPa6.4 Msi · Bulk Modulus 125 GPa18.1 Msi · Poisson's Ratio 0.33 · Reduction in Area 55% · Charpy V-Notch Impact (RT) 60 J44.3 ft·lbf
Physical
Density and transition temperatures.
Same in both: Density 8.3 g/cm³0.3 lb/in³ · Melting Point (Solidus) 1,027°C1,881 °F · Liquidus Temperature 1,054°C1,929 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 45 W/m·K26 BTU/hr·ft·°F · Specific Heat Capacity 377 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 16.7 µm/m·K9.3 µin/in·°F · Latent Heat of Fusion 205 J/g88.1 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 9.5 % IACS · Electrical Resistivity 1.92×10⁻⁷ Ω·m7.56 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.25 V · Corrosion Resistance 72 / 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 %) 30% · Weldability 70 / 100 · Castability 45 / 100 · Brazeability / Solderability 45 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 62 MJ/kg26,655 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.
C63600-H04 vs C63600-O61 — frequently asked
Is C63600-H04 stronger than C63600-O61?
Yes. C63600-H04 has a typical yield strength of 550 MPa (79.8 ksi) against 170 MPa (24.7 ksi) for C63600-O61 — about 3.2 times as much. Tensile strength is 640 MPa (92.8 ksi) vs 415 MPa (60.2 ksi).
Which condition does FabDigit quote by default, H04 or O61?
O61 is the default C63600 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, C63600-H04 or C63600-O61?
C63600-H04, by a small margin. Both rate fair for machinability — 50/100 against 35/100 for C63600-O61.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C63600-H04 and C63600-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.