Copper Alloy C84400 vs CC495K
Copper Alloy · grade comparison
Copper Alloy C84400 and CC495K are both copper alloy grades. CC495K is the stronger of the two: yield strength 140 MPa (20.3 ksi) against 110 MPa (16 ksi) for C84400, about 27% more; tensile strength follows at 270 MPa (39.2 ksi) vs 234 MPa (33.9 ksi). In exchange, C84400 is the more ductile: elongation 26% versus 10% for CC495K, and CC495K is harder (75 HB vs 55 HB). C84400 is stiffer (95 GPa vs 76 GPa) and CC495K runs hotter in service (250°C vs 200°C continuous). On the shop floor, C84400 welds better (poor vs not recommended) and CC495K sits in a lower cost tier (high, $$$$) than C84400 (specialty, $$$$$).
C84400Choose it when the part is bent, formed or impact-loaded, or when it will be welded.
CC495KChoose it when strength drives the design, or when the part sees heat.
C84400 vs CC495K: 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
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: 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
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Same in both: Latent Heat of Fusion 170 J/g73.1 BTU/lb · Min Service Temperature -200°C-328 °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) -0.28 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Castability
Brazeability / Solderability
Same in both: Formability (cold) 10 / 100 · Polishability 60 / 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 | C84400 | CC495K |
|---|---|---|
| CNC machining | Yes | — |
| Default condition | As Cast | — |
| Relative cost | $$$$$ Specialty | $$$$ High |
| Min. machined wall | 0.8 mm | — |
| Best machined surface | Ra 1.6 µm | — |
| Chrome Plating | Yes | — |
| Electropolishing | Yes | — |
| Nickel Plating | Yes | — |
| Painting | Yes | — |
| Tin Plating | Yes | — |
They share 4 finishes: Copper Plating, Electroless Nickel (EN), Gold Plating, Silver Plating.
C84400 vs CC495K — frequently asked
Is CC495K stronger than C84400?
Yes. CC495K has a typical yield strength of 140 MPa (20.3 ksi) against 110 MPa (16 ksi) for C84400 — about 27% more. Tensile strength is 270 MPa (39.2 ksi) vs 234 MPa (33.9 ksi).
Which is cheaper, C84400 or CC495K?
CC495K is the lower-cost material: it sits in the high tier ($$$$) while C84400 is specialty ($$$$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which is easier to machine, C84400 or CC495K?
C84400, by a small margin. Both rate excellent for machinability — 90/100 against 85/100 for CC495K; for welding the order is C84400 first (poor, 20/100) then CC495K (not recommended, 10/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C84400 and CC495K 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.