Copper Alloy CC490K vs CC764S
Copper Alloy · grade comparison
Copper Alloy CC490K and CC764S are both copper alloy grades. CC764S is the stronger of the two: yield strength 390 MPa (56.6 ksi) against 100 MPa (14.5 ksi) for CC490K, about 3.9 times as much; tensile strength follows at 680 MPa (98.6 ksi) vs 215 MPa (31.2 ksi). In exchange, CC490K is the more ductile: elongation 20% versus 18% for CC764S, and CC764S is harder (170 HB vs 65 HB). CC764S is lighter (7.7 g/cm³ vs 8.7 g/cm³ for CC490K) and CC764S is stiffer (100 GPa vs 90 GPa). On the shop floor, CC490K machines more easily (very good vs poor).
CC490KChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
CC764SChoose it when strength drives the design, or when weight is the constraint.
CC490K vs CC764S: 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
Shear Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Compressive Strength
Same in both: Bulk Modulus 105 GPa15.2 Msi · Charpy V-Notch Impact (RT) 25 J18.4 ft·lbf
Physical
Density and transition temperatures.
Density
Melting Point (Solidus)
Liquidus Temperature
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Thermal Expansion (CTE, 20–100 °C)
Latent Heat of Fusion
Same in both: Specific Heat Capacity 377 J/kg·K0.09 BTU/lb·°F · 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).
Galvanic Potential (seawater, vs SCE)
Corrosion Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Castability
Brazeability / Solderability
Same in both: Weldability 25 / 100 · Polishability 60 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Water
Typical Recycled Content
Same in both: Embodied Energy (primary production) 55 MJ/kg23,646 BTU/lb · Embodied Carbon (primary production) 3.6 kg CO₂/kg
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Thermal Shock Resistance Index
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.
Manufacturing and finishing
| Capability | CC490K | CC764S |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 4 finishes: Copper Plating, Electroless Nickel (EN), Gold Plating, Silver Plating.
CC490K vs CC764S — frequently asked
Is CC764S stronger than CC490K?
Yes. CC764S has a typical yield strength of 390 MPa (56.6 ksi) against 100 MPa (14.5 ksi) for CC490K — about 3.9 times as much. Tensile strength is 680 MPa (98.6 ksi) vs 215 MPa (31.2 ksi).
Which is cheaper, CC490K or CC764S?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, CC490K or CC764S?
CC490K. Its machinability rates very good (80/100) against poor (30/100) for CC764S.
Ready to make it?
Upload a CAD file and FabDigit prices the part in CC490K and CC764S 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.