Copper Alloy CC481K-GM vs CC481K-GS
Copper Alloy · CC481K temper comparison
CC481K-GM and CC481K-GS are two conditions of the same copper alloy grade, CC481K: GM (permanent (chill) mould cast) versus GS (sand cast). The chemistry is identical, so every difference below comes from the condition. CC481K-GM is the stronger of the two: yield strength 220 MPa (31.9 ksi) against 190 MPa (27.6 ksi) for CC481K-GS, about 16% more; tensile strength follows at 350 MPa (50.8 ksi) vs 310 MPa (45 ksi). In exchange, CC481K-GS is the more ductile: elongation 6% versus 4% for CC481K-GM, and CC481K-GM is harder (110 HB vs 95 HB). CC481K-GM is stiffer (110 GPa vs 103 GPa).
CC481K-GMChoose it when strength drives the design.
CC481K-GSChoose it when the part is bent, formed or impact-loaded.
CC481K-GM vs CC481K-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.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Same in both: Shear Modulus 41 GPa5.9 Msi · Bulk Modulus 115 GPa16.7 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 8.8 g/cm³0.32 lb/in³ · Melting Point (Solidus) 830°C1,526 °F · Liquidus Temperature 1,000°C1,832 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: Specific Heat Capacity 377 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 18.4 µm/m·K10.2 µin/in·°F · Latent Heat of Fusion 170 J/g73.1 BTU/lb · Max Service Temperature (continuous) 250°C482 °F · Min Service Temperature -200°C-328 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 11 % IACS · Electrical Resistivity 1.57×10⁻⁷ Ω·m6.18 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.26 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 20 / 100 · Castability 80 / 100 · Brazeability / Solderability 75 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 70 MJ/kg30,095 BTU/lb · Embodied Carbon (primary production) 4.8 kg CO₂/kg · Embodied Water 320 L/kg38.3 gal/lb · Typical Recycled Content 45%
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.
CC481K-GM vs CC481K-GS — frequently asked
Is CC481K-GM stronger than CC481K-GS?
Yes. CC481K-GM has a typical yield strength of 220 MPa (31.9 ksi) against 190 MPa (27.6 ksi) for CC481K-GS — about 16% more. Tensile strength is 350 MPa (50.8 ksi) vs 310 MPa (45 ksi).
Which condition does FabDigit quote by default, GM or GS?
GC is the default CC481K condition in the FabDigit quote flow (neither GM nor GS). 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 CC481K-GM over CC481K-GS?
Pick CC481K-GM when strength drives the design. Pick CC481K-GS when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in CC481K-GM and CC481K-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.