Copper Alloy C77600-H04 vs C77600-O60
Copper Alloy · C77600 temper comparison
C77600-H04 and C77600-O60 are two conditions of the same copper alloy grade, C77600: H04 (full hard) versus O60 (soft annealed). The chemistry is identical, so every difference below comes from the condition. C77600-H04 is the stronger of the two: yield strength 550 MPa (79.8 ksi) against 170 MPa (24.7 ksi) for C77600-O60, about 3.2 times as much; tensile strength follows at 620 MPa (89.9 ksi) vs 400 MPa (58 ksi). In exchange, C77600-O60 is the more ductile: elongation 40% versus 5% for C77600-H04, and C77600-H04 is harder (174 HB vs 90 HB). C77600-O60 runs hotter in service (250°C vs 175°C continuous). On the shop floor, C77600-H04 machines more easily (32 vs 22 out of 100) and C77600-O60 welds better (good vs fair).
C77600-H04Choose it when strength drives the design, or when the part is machined in volume.
C77600-O60Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C77600-H04 vs C77600-O60: 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, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 125 GPa18.1 Msi · Shear Modulus 47 GPa6.8 Msi · Bulk Modulus 120 GPa17.4 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 8.7 g/cm³0.31 lb/in³ · Melting Point (Solidus) 1,030°C1,886 °F · Liquidus Temperature 1,080°C1,976 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 380 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 16.2 µm/m·K9 µin/in·°F · Latent Heat of Fusion 200 J/g86 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.27 V
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: Brazeability / Solderability 85 / 100 · Polishability 88 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 62 MJ/kg26,655 BTU/lb · Embodied Carbon (primary production) 4.5 kg CO₂/kg · Embodied Water 260 L/kg31.2 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.
C77600-H04 vs C77600-O60 — frequently asked
Is C77600-H04 stronger than C77600-O60?
Yes. C77600-H04 has a typical yield strength of 550 MPa (79.8 ksi) against 170 MPa (24.7 ksi) for C77600-O60 — about 3.2 times as much. Tensile strength is 620 MPa (89.9 ksi) vs 400 MPa (58 ksi).
Which condition does FabDigit quote by default, H04 or O60?
H02 is the default C77600 condition in the FabDigit quote flow (neither H04 nor O60). 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, C77600-H04 or C77600-O60?
C77600-H04, by a small margin. Both rate poor for machinability — 32/100 against 22/100 for C77600-O60; for welding the order is C77600-O60 first (good, 60/100) then C77600-H04 (fair, 50/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C77600-H04 and C77600-O60 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.