Copper Alloy C65600 vs ERCu
Copper Alloy · grade comparison
Copper Alloy C65600 and ERCu are both copper alloy grades. C65600 is the stronger of the two: yield strength 190 MPa (27.6 ksi) against 80 MPa (11.6 ksi) for ERCu, about 138% more; tensile strength follows at 350 MPa (50.8 ksi) vs 225 MPa (32.6 ksi). C65600 is harder — 85 HB against 55 HB for ERCu — which matters for wear surfaces and threads. C65600 is lighter (8.53 g/cm³ vs 8.9 g/cm³ for ERCu) and ERCu is stiffer (115 GPa vs 103 GPa). On the shop floor, C65600 welds better (excellent vs very good).
C65600Choose it when strength drives the design, or when surface hardness matters.
ERCuChoose it when the part sees heat.
C65600 vs ERCu: 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)
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Reduction in Area
Hardness, Vickers
Same in both: Poisson's Ratio 0.34 · Elongation at Break 35%
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 205 J/g88.1 BTU/lb · Min Service Temperature -196°C-321 °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 78 / 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 | C65600 | ERCu |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 4 finishes: Copper Plating, Electroless Nickel (EN), Gold Plating, Silver Plating.
C65600 vs ERCu — frequently asked
Is C65600 stronger than ERCu?
Yes. C65600 has a typical yield strength of 190 MPa (27.6 ksi) against 80 MPa (11.6 ksi) for ERCu — about 138% more. Tensile strength is 350 MPa (50.8 ksi) vs 225 MPa (32.6 ksi).
Which is cheaper, C65600 or ERCu?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which welds better, C65600 or ERCu?
C65600. Its weldability rates excellent (92/100) against very good (78/100) for ERCu.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C65600 and ERCu 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.