Copper Alloy C68100 vs ERCuAl-A2
Copper Alloy · grade comparison
Copper Alloy C68100 and ERCuAl-A2 are both copper alloy grades. ERCuAl-A2 is the stronger of the two: yield strength 270 MPa (39.2 ksi) against 190 MPa (27.6 ksi) for C68100, about 42% more; tensile strength follows at 585 MPa (84.8 ksi) vs 415 MPa (60.2 ksi). ERCuAl-A2 is harder — 150 HB against 105 HB for C68100 — which matters for wear surfaces and threads. ERCuAl-A2 is lighter (7.58 g/cm³ vs 8.4 g/cm³ for C68100) and ERCuAl-A2 is stiffer (117 GPa vs 100 GPa). On the shop floor, C68100 machines more easily (fair vs poor) and C68100 forms better (good vs fair).
C68100Choose it when the part is machined in volume.
ERCuAl-A2Choose it when strength drives the design, or when surface hardness matters.
C68100 vs ERCuAl-A2: 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
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elongation at Break 25%
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
Max Service Temperature (continuous)
Min Service Temperature
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
Weldability
Formability (cold)
Castability
Brazeability / Solderability
Polishability
Same in both: Machinability Rating (AISI 1212 = 100 %) 30%
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 | C68100 | ERCuAl-A2 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 4 finishes: Copper Plating, Electroless Nickel (EN), Gold Plating, Silver Plating.
C68100 vs ERCuAl-A2 — frequently asked
Is ERCuAl-A2 stronger than C68100?
Yes. ERCuAl-A2 has a typical yield strength of 270 MPa (39.2 ksi) against 190 MPa (27.6 ksi) for C68100 — about 42% more. Tensile strength is 585 MPa (84.8 ksi) vs 415 MPa (60.2 ksi).
Which is cheaper, C68100 or ERCuAl-A2?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, C68100 or ERCuAl-A2?
C68100. Its machinability rates fair (45/100) against poor (32/100) for ERCuAl-A2; for welding the order is C68100 first (very good, 80/100) then ERCuAl-A2 (very good, 72/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C68100 and ERCuAl-A2 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.