Copper Alloy CC498K-GM vs CC498K-GS
Copper Alloy · CC498K temper comparison
CC498K-GM and CC498K-GS are two conditions of the same copper alloy grade, CC498K: GM (permanent (chill) mould cast) versus GS (sand cast). The chemistry is identical, so every difference below comes from the condition. CC498K-GM is the stronger of the two: yield strength 130 MPa (18.9 ksi) against 110 MPa (16 ksi) for CC498K-GS, about 18% more; tensile strength follows at 260 MPa (37.7 ksi) vs 230 MPa (33.4 ksi). In exchange, CC498K-GS is the more ductile: elongation 15% versus 13% for CC498K-GM, and CC498K-GM is harder (72 HB vs 65 HB).
CC498K-GMChoose it when strength drives the design.
CC498K-GSChoose it when the part is bent, formed or impact-loaded.
CC498K-GM vs CC498K-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 8.8 g/cm³0.32 lb/in³ · Melting Point (Solidus) 855°C1,571 °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 380 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 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 12 % IACS · Electrical Resistivity 1.44×10⁻⁷ Ω·m5.67 µΩ·in
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.
Same in both: Machinability 80 / 100 · Machinability Rating (AISI 1212 = 100 %) 80% · Weldability 30 / 100 · Formability (cold) 10 / 100 · Castability 85 / 100 · Brazeability / Solderability 70 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 50 MJ/kg21,496 BTU/lb · Embodied Carbon (primary production) 3.5 kg CO₂/kg · Embodied Water 250 L/kg30 gal/lb · Typical Recycled Content 60%
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.
CC498K-GM vs CC498K-GS — frequently asked
Is CC498K-GM stronger than CC498K-GS?
Yes. CC498K-GM has a typical yield strength of 130 MPa (18.9 ksi) against 110 MPa (16 ksi) for CC498K-GS — about 18% more. Tensile strength is 260 MPa (37.7 ksi) vs 230 MPa (33.4 ksi).
Which condition does FabDigit quote by default, GM or GS?
GC is the default CC498K 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 CC498K-GM over CC498K-GS?
Pick CC498K-GM when strength drives the design. Pick CC498K-GS when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in CC498K-GM and CC498K-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.