Copper Alloy C85900 vs CC490K
Copper Alloy · grade comparison
Copper Alloy C85900 and CC490K are both copper alloy grades. C85900 is the stronger of the two: yield strength 115 MPa (16.7 ksi) against 100 MPa (14.5 ksi) for CC490K, about 15% more; tensile strength follows at 290 MPa (42.1 ksi) vs 215 MPa (31.2 ksi). C85900 is the more ductile: elongation 25% versus 20% for CC490K, and CC490K is harder (65 HB vs 60 HB). C85900 is lighter (8.4 g/cm³ vs 8.7 g/cm³ for CC490K) and C85900 is stiffer (97 GPa vs 90 GPa). On the shop floor, C85900 sits in a lower cost tier (premium, $$$) than CC490K (high, $$$$).
C85900Choose it when strength drives the design, or when the part is bent, formed or impact-loaded.
C85900 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
Bulk Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Vickers
Reduction in Area
Hardness, Rockwell B
Same in both: Poisson's Ratio 0.34 · 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
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).
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.
Weldability
Brazeability / Solderability
Polishability
Same in both: Machinability 80 / 100 · Machinability Rating (AISI 1212 = 100 %) 80% · Formability (cold) 10 / 100 · Castability 85 / 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 | C85900 | CC490K |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$ Premium | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 4 finishes: Copper Plating, Electroless Nickel (EN), Gold Plating, Silver Plating.
C85900 vs CC490K — frequently asked
Is C85900 stronger than CC490K?
Yes. C85900 has a typical yield strength of 115 MPa (16.7 ksi) against 100 MPa (14.5 ksi) for CC490K — about 15% more. Tensile strength is 290 MPa (42.1 ksi) vs 215 MPa (31.2 ksi).
Which is cheaper, C85900 or CC490K?
C85900 is the lower-cost material: it sits in the premium tier ($$$) 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, C85900 or CC490K?
C85900. Its weldability rates poor (30/100) against poor (25/100) for CC490K.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C85900 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.