Copper Alloy C1220 vs Cu-ETP1
Copper Alloy · grade comparison
Copper Alloy C1220 and Cu-ETP1 are both copper alloy grades. Both yield at about 70 MPa — strength does not separate them. C1220 is the more ductile: elongation 45% versus 40% for Cu-ETP1. Cu-ETP1 conducts heat better (394 W/m·K vs 339 W/m·K). On the shop floor, C1220 welds better (very good vs fair).
C1220Choose it when the part is bent, formed or impact-loaded, or when it will be welded.
C1220 vs Cu-ETP1: 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.
Tensile Strength (Ultimate)
Elongation at Break
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Same in both: Elastic (Young's) Modulus 117 GPa17 Msi · Shear Modulus 44 GPa6.4 Msi · Bulk Modulus 140 GPa20.3 Msi · Poisson's Ratio 0.34 · Yield Strength (0.2% offset) 70 MPa10.2 ksi · Charpy V-Notch Impact (RT) 60 J44.3 ft·lbf · Hardness, Brinell 45 HB · Hardness, Vickers 50 HV
Physical
Density and transition temperatures.
Density
Same in both: Melting Point (Solidus) 1,065°C1,949 °F · Liquidus Temperature 1,083°C1,981 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Thermal Expansion (CTE, 20–100 °C)
Min Service Temperature
Same in both: Specific Heat Capacity 385 J/kg·K0.09 BTU/lb·°F · Latent Heat of Fusion 205 J/g88.1 BTU/lb · 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
Weldability
Formability (cold)
Castability
Brazeability / Solderability
Polishability
Same in both: Machinability Rating (AISI 1212 = 100 %) 20%
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.
Thermal Diffusivity
Thermal Shock Resistance Index
Same in both: Specific Strength (UTS / density) 25 kN·m/kg · Specific Stiffness (E / density) 13.1 MN·m/kg · Modulus of Resilience 21 kJ/m³
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 | C1220 | Cu-ETP1 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 4 finishes: Copper Plating, Electroless Nickel (EN), Gold Plating, Silver Plating.
C1220 vs Cu-ETP1 — frequently asked
What is the difference between C1220 and Cu-ETP1?
Copper Alloy C1220 and Cu-ETP1 are both copper alloy grades. Both yield at about 70 MPa — strength does not separate them. C1220 is the more ductile: elongation 45% versus 40% for Cu-ETP1.
Which is cheaper, C1220 or Cu-ETP1?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, C1220 or Cu-ETP1?
Cu-ETP1, by a small margin. Both rate poor for machinability — 30/100 against 25/100 for C1220; for welding the order is C1220 first (very good, 80/100) then Cu-ETP1 (fair, 50/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C1220 and Cu-ETP1 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.