Copper Alloy CC490K-GM vs CC490K-GS
Copper Alloy · CC490K temper comparison
CC490K-GM and CC490K-GS are two conditions of the same copper alloy grade, CC490K: GM (gravity (permanent) die cast) versus GS (sand cast). The chemistry is identical, so every difference below comes from the condition. CC490K-GM is the stronger of the two: yield strength 110 MPa (16 ksi) against 100 MPa (14.5 ksi) for CC490K-GS, about 10% more. In exchange, CC490K-GS is the more ductile: elongation 20% versus 16% for CC490K-GM, and CC490K-GM is harder (70 HB vs 65 HB). CC490K-GM is stiffer (95 GPa vs 90 GPa).
CC490K-GMChoose it when strength drives the design.
CC490K-GSChoose it when the part is bent, formed or impact-loaded.
CC490K-GM vs CC490K-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
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Shear Modulus 36 GPa5.2 Msi · Bulk Modulus 105 GPa15.2 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 8.7 g/cm³0.31 lb/in³ · Melting Point (Solidus) 900°C1,652 °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) 18.5 µm/m·K10.3 µin/in·°F · Latent Heat of Fusion 205 J/g88.1 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).
Same in both: Galvanic Potential (seawater, vs SCE) -0.25 V · Corrosion Resistance 70 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Same in both: Machinability 80 / 100 · Machinability Rating (AISI 1212 = 100 %) 80% · Weldability 25 / 100 · Formability (cold) 10 / 100 · Castability 85 / 100 · Brazeability / Solderability 75 / 100 · Polishability 60 / 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 260 L/kg31.2 gal/lb · Typical Recycled Content 85%
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.
CC490K-GM vs CC490K-GS — frequently asked
Is CC490K-GM stronger than CC490K-GS?
Yes. CC490K-GM has a typical yield strength of 110 MPa (16 ksi) against 100 MPa (14.5 ksi) for CC490K-GS — about 10% more. Tensile strength is 225 MPa (32.6 ksi) vs 215 MPa (31.2 ksi).
Which condition does FabDigit quote by default, GM or GS?
GS is the default CC490K 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 CC490K-GM over CC490K-GS?
Pick CC490K-GM when strength drives the design. Pick CC490K-GS when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in CC490K-GM and CC490K-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.