Copper Alloy Cu-ETP1 vs Cu-HCP
Copper Alloy · grade comparison
Copper Alloy Cu-ETP1 and Cu-HCP are both copper alloy grades. Both yield at about 70 MPa — strength does not separate them. Cu-HCP is the more ductile: elongation 45% versus 40% for Cu-ETP1, and Cu-ETP1 is harder (45 HB vs 42 HB). On the shop floor, Cu-HCP welds better (very good vs fair).
Cu-HCPChoose it when the part is bent, formed or impact-loaded, or when it will be welded.
Cu-ETP1 vs Cu-HCP: 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
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Vickers
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 · Shear Strength 150 MPa21.8 ksi · Fatigue Strength (Endurance Limit) 75 MPa10.9 ksi
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)
Same in both: Corrosion Resistance 65 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Formability (cold)
Castability
Brazeability / Solderability
Same in both: Machinability Rating (AISI 1212 = 100 %) 20% · Polishability 80 / 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)
Thermal Diffusivity
Thermal Shock Resistance Index
Same in both: 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 | Cu-ETP1 | Cu-HCP |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 4 finishes: Copper Plating, Electroless Nickel (EN), Gold Plating, Silver Plating.
Cu-ETP1 vs Cu-HCP — frequently asked
What is the difference between Cu-ETP1 and Cu-HCP?
Copper Alloy Cu-ETP1 and Cu-HCP are both copper alloy grades. Both yield at about 70 MPa — strength does not separate them. Cu-HCP is the more ductile: elongation 45% versus 40% for Cu-ETP1, and Cu-ETP1 is harder (45 HB vs 42 HB).
Which is cheaper, Cu-ETP1 or Cu-HCP?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, Cu-ETP1 or Cu-HCP?
Cu-ETP1, by a small margin. Both rate poor for machinability — 30/100 against 25/100 for Cu-HCP; for welding the order is Cu-HCP first (very good, 75/100) then Cu-ETP1 (fair, 50/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Cu-ETP1 and Cu-HCP 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.