Copper Alloy C18980 vs ERCuSi-A
Copper Alloy · grade comparison
Copper Alloy C18980 and ERCuSi-A are both copper alloy grades. ERCuSi-A is the stronger of the two: yield strength 195 MPa (28.3 ksi) against 80 MPa (11.6 ksi) for C18980, about 144% more; tensile strength follows at 350 MPa (50.8 ksi) vs 240 MPa (34.8 ksi). ERCuSi-A is the more ductile: elongation 38% versus 32% for C18980, and ERCuSi-A is harder (85 HB vs 65 HB). ERCuSi-A is lighter (8.53 g/cm³ vs 8.9 g/cm³ for C18980) and C18980 is stiffer (115 GPa vs 103 GPa). On the shop floor, ERCuSi-A machines more easily (33 vs 22 out of 100).
ERCuSi-AChoose it when strength drives the design, or when the part is bent, formed or impact-loaded.
C18980 vs ERCuSi-A: 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)
Elongation at Break
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Reduction in Area 45% · Charpy V-Notch Impact (RT) 60 J44.3 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)
Same in both: Latent Heat of Fusion 205 J/g88.1 BTU/lb · Max Service Temperature (continuous) 200°C392 °F · 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 %)
Formability (cold)
Castability
Brazeability / Solderability
Polishability
Same in both: Weldability 90 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Water
Typical Recycled Content
Same in both: Embodied Carbon (primary production) 3.8 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 | C18980 | ERCuSi-A |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 4 finishes: Copper Plating, Electroless Nickel (EN), Gold Plating, Silver Plating.
C18980 vs ERCuSi-A — frequently asked
Is ERCuSi-A stronger than C18980?
Yes. ERCuSi-A has a typical yield strength of 195 MPa (28.3 ksi) against 80 MPa (11.6 ksi) for C18980 — about 144% more. Tensile strength is 350 MPa (50.8 ksi) vs 240 MPa (34.8 ksi).
Which is cheaper, C18980 or ERCuSi-A?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, C18980 or ERCuSi-A?
ERCuSi-A, by a small margin. Both rate poor for machinability — 33/100 against 22/100 for C18980.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C18980 and ERCuSi-A 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.