Copper Alloy CC490K vs CC751S
Copper Alloy · grade comparison
Copper Alloy CC490K and CC751S are both copper alloy grades. CC490K is the stronger of the two: yield strength 100 MPa (14.5 ksi) against 90 MPa (13.1 ksi) for CC751S, about 11% more. CC490K is the more ductile: elongation 20% versus 15% for CC751S, and CC490K is harder (65 HB vs 55 HB). CC751S conducts heat better (110 W/m·K vs 78 W/m·K). On the shop floor, CC751S sits in a lower cost tier (premium, $$$) than CC490K (high, $$$$).
CC490KChoose it when strength drives the design, or when the part is bent, formed or impact-loaded.
CC751SChoose it when cost is the deciding factor.
CC490K vs CC751S: 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.
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)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Compressive Strength
Same in both: Elastic (Young's) Modulus 90 GPa13.1 Msi · Bulk Modulus 105 GPa15.2 Msi
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
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Latent Heat of Fusion
Same in both: 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
Weldability
Formability (cold)
Castability
Polishability
Same in both: Machinability Rating (AISI 1212 = 100 %) 80% · Brazeability / Solderability 75 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Typical Recycled Content
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 | CC751S |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$ Premium |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 4 finishes: Copper Plating, Electroless Nickel (EN), Gold Plating, Silver Plating.
CC490K vs CC751S — frequently asked
Is CC490K stronger than CC751S?
Yes. CC490K has a typical yield strength of 100 MPa (14.5 ksi) against 90 MPa (13.1 ksi) for CC751S — about 11% more. Tensile strength is 215 MPa (31.2 ksi) vs 220 MPa (31.9 ksi).
Which is cheaper, CC490K or CC751S?
CC751S is the lower-cost material: it sits in the premium tier ($$$) while CC490K is high ($$$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which welds better, CC490K or CC751S?
CC490K. Its weldability rates poor (25/100) against poor (20/100) for CC751S.
Ready to make it?
Upload a CAD file and FabDigit prices the part in CC490K and CC751S 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.