Copper Alloy C85700 vs CC490K
Copper Alloy · grade comparison
Copper Alloy C85700 and CC490K are both copper alloy grades. C85700 is the stronger of the two: yield strength 140 MPa (20.3 ksi) against 100 MPa (14.5 ksi) for CC490K, about 40% more; tensile strength follows at 380 MPa (55.1 ksi) vs 215 MPa (31.2 ksi). In exchange, CC490K is the more ductile: elongation 20% versus 18% for C85700, and C85700 is harder (75 HB vs 65 HB). C85700 is lighter (8.41 g/cm³ vs 8.7 g/cm³ for CC490K) and C85700 is stiffer (100 GPa vs 90 GPa). On the shop floor, C85700 sits in a lower cost tier (premium, $$$) than CC490K (high, $$$$).
C85700Choose it when strength drives the design, or when weight is the constraint.
CC490KChoose it when the part is bent, formed or impact-loaded.
C85700 vs CC490K: 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
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Reduction in Area
Hardness, Rockwell B
Hardness, Vickers
Same in both: Bulk Modulus 105 GPa15.2 Msi · Poisson's Ratio 0.34
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
Min Service Temperature
Same in both: Specific Heat Capacity 377 J/kg·K0.09 BTU/lb·°F · Max Service Temperature (continuous) 200°C392 °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.
Weldability
Castability
Polishability
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Same in both: Machinability 80 / 100 · 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 | C85700 | CC490K |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$ Premium | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 4 finishes: Copper Plating, Electroless Nickel (EN), Gold Plating, Silver Plating.
C85700 vs CC490K — frequently asked
Is C85700 stronger than CC490K?
Yes. C85700 has a typical yield strength of 140 MPa (20.3 ksi) against 100 MPa (14.5 ksi) for CC490K — about 40% more. Tensile strength is 380 MPa (55.1 ksi) vs 215 MPa (31.2 ksi).
Which is cheaper, C85700 or CC490K?
C85700 is the lower-cost material: it sits in the premium tier ($$$) 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, C85700 or CC490K?
CC490K. Its weldability rates poor (25/100) against poor (20/100) for C85700.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C85700 and CC490K 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.