Copper Alloy C83400 vs CC765S
Copper Alloy · grade comparison
Copper Alloy C83400 and CC765S are both copper alloy grades. CC765S is the stronger of the two: yield strength 230 MPa (33.4 ksi) against 69 MPa (10 ksi) for C83400, about 3.3 times as much; tensile strength follows at 480 MPa (69.6 ksi) vs 234 MPa (33.9 ksi). In exchange, C83400 is the more ductile: elongation 35% versus 22% for CC765S, and CC765S is harder (120 HB vs 50 HB). CC765S is lighter (8 g/cm³ vs 8.8 g/cm³ for C83400) and C83400 conducts heat better (159 W/m·K vs 60 W/m·K). On the shop floor, C83400 machines more easily (good vs fair) and CC765S sits in a lower cost tier (premium, $$$) than C83400 (high, $$$$).
C83400Choose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
CC765SChoose it when strength drives the design, or when weight is the constraint.
C83400 vs CC765S: 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
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Vickers
Compressive Strength
Fracture Toughness (K_IC)
Hardness, Rockwell B
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
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Latent Heat of Fusion
Min Service Temperature
Same in both: 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.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Castability
Brazeability / Solderability
Same in both: Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Water
Typical Recycled Content
Same in both: 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 | C83400 | CC765S |
|---|---|---|
| CNC machining | Yes | — |
| Default condition | As Cast | — |
| Relative cost | $$$$ High | $$$ Premium |
| 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.
C83400 vs CC765S — frequently asked
Is CC765S stronger than C83400?
Yes. CC765S has a typical yield strength of 230 MPa (33.4 ksi) against 69 MPa (10 ksi) for C83400 — about 3.3 times as much. Tensile strength is 480 MPa (69.6 ksi) vs 234 MPa (33.9 ksi).
Which is cheaper, C83400 or CC765S?
CC765S is the lower-cost material: it sits in the premium tier ($$$) while C83400 is high ($$$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which is easier to machine, C83400 or CC765S?
C83400. Its machinability rates good (58/100) against fair (45/100) for CC765S; for welding the order is C83400 first (fair, 45/100) then CC765S (fair, 40/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C83400 and CC765S 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.