Copper Alloy CC767S-GM vs CC767S-GS
Copper Alloy · CC767S temper comparison
CC767S-GM and CC767S-GS are two conditions of the same copper alloy grade, CC767S: GM (permanent (metal) mould cast) versus GS (sand cast). The chemistry is identical, so every difference below comes from the condition. CC767S-GM is the stronger of the two: yield strength 180 MPa (26.1 ksi) against 150 MPa (21.8 ksi) for CC767S-GS, about 20% more; tensile strength follows at 450 MPa (65.3 ksi) vs 400 MPa (58 ksi). In exchange, CC767S-GS is the more ductile: elongation 32% versus 22% for CC767S-GM, and CC767S-GM is harder (95 HB vs 80 HB).
CC767S-GMChoose it when strength drives the design.
CC767S-GSChoose it when the part is bent, formed or impact-loaded.
CC767S-GM vs CC767S-GS: 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 100 GPa14.5 Msi · Shear Modulus 38 GPa5.5 Msi · Bulk Modulus 110 GPa16 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 8.3 g/cm³0.3 lb/in³ · Melting Point (Solidus) 880°C1,616 °F · Liquidus Temperature 900°C1,652 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 105 W/m·K60.7 BTU/hr·ft·°F · 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.
Same in both: Electrical Conductivity 20 % IACS · Electrical Resistivity 8.6×10⁻⁸ Ω·m3.39 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.28 V · Corrosion Resistance 55 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Formability (cold)
Same in both: Machinability 45 / 100 · Machinability Rating (AISI 1212 = 100 %) 130% · Weldability 40 / 100 · Castability 85 / 100 · Brazeability / Solderability 75 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 47 MJ/kg20,206 BTU/lb · Embodied Carbon (primary production) 3.1 kg CO₂/kg · Embodied Water 300 L/kg35.9 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.
CC767S-GM vs CC767S-GS — frequently asked
Is CC767S-GM stronger than CC767S-GS?
Yes. CC767S-GM has a typical yield strength of 180 MPa (26.1 ksi) against 150 MPa (21.8 ksi) for CC767S-GS — about 20% more. Tensile strength is 450 MPa (65.3 ksi) vs 400 MPa (58 ksi).
Which condition does FabDigit quote by default, GM or GS?
GS is the default CC767S 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 CC767S-GM over CC767S-GS?
Pick CC767S-GM when strength drives the design. Pick CC767S-GS when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in CC767S-GM and CC767S-GS 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.