Copper Alloy CC766S-GC vs CC766S-GM
Copper Alloy · CC766S temper comparison
CC766S-GC and CC766S-GM are two conditions of the same copper alloy grade, CC766S: GC (continuously cast bar/tube) versus GM (gravity die cast). The chemistry is identical, so every difference below comes from the condition. CC766S-GC is the stronger of the two: yield strength 185 MPa (26.8 ksi) against 175 MPa (25.4 ksi) for CC766S-GM, about 6% more. CC766S-GC is harder — 62 HRB against 58 HRB for CC766S-GM — which matters for wear surfaces and threads.
CC766S-GCChoose it when strength drives the design, or when surface hardness matters.
CC766S-GC vs CC766S-GM: 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)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Shear Modulus 37 GPa5.4 Msi · Bulk Modulus 115 GPa16.7 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 8.35 g/cm³0.3 lb/in³ · Melting Point (Solidus) 885°C1,625 °F · Liquidus Temperature 905°C1,661 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: Specific Heat Capacity 380 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 20.5 µm/m·K11.4 µin/in·°F · Latent Heat of Fusion 175 J/g75.2 BTU/lb · Max Service Temperature (continuous) 200°C392 °F · Min Service Temperature -100°C-148 °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) -0.25 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Same in both: Weldability 35 / 100 · Formability (cold) 28 / 100 · Castability 75 / 100 · Brazeability / Solderability 45 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 55 MJ/kg23,646 BTU/lb · Embodied Carbon (primary production) 3.6 kg CO₂/kg · Embodied Water 250 L/kg30 gal/lb · Typical Recycled Content 70%
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.
CC766S-GC vs CC766S-GM — frequently asked
Is CC766S-GC stronger than CC766S-GM?
Yes. CC766S-GC has a typical yield strength of 185 MPa (26.8 ksi) against 175 MPa (25.4 ksi) for CC766S-GM — about 6% more. Tensile strength is 450 MPa (65.3 ksi) vs 440 MPa (63.8 ksi).
Which condition does FabDigit quote by default, GC or GM?
GS is the default CC766S condition in the FabDigit quote flow (neither GC nor GM). 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 CC766S-GC over CC766S-GM?
Pick CC766S-GC when strength drives the design, or when surface hardness matters.
Ready to make it?
Upload a CAD file and FabDigit prices the part in CC766S-GC and CC766S-GM 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.