Copper Alloy Cu-DHP vs Cu-ETP1
Copper Alloy · grade comparison
Copper Alloy Cu-DHP and Cu-ETP1 are both copper alloy grades. Cu-DHP is the stronger of the two: yield strength 220 MPa (31.9 ksi) against 70 MPa (10.2 ksi) for Cu-ETP1, about 3.1 times as much; tensile strength follows at 275 MPa (39.9 ksi) vs 220 MPa (31.9 ksi). In exchange, Cu-ETP1 is the more ductile: elongation 40% versus 20% for Cu-DHP, and Cu-DHP is harder (70 HB vs 45 HB). Cu-ETP1 runs hotter in service (200°C vs 150°C continuous) and Cu-ETP1 conducts heat better (394 W/m·K vs 339 W/m·K). On the shop floor, Cu-DHP welds better (very good vs fair).
Cu-DHPChoose it when strength drives the design, or when it will be welded.
Cu-ETP1Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Cu-DHP 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)
Yield Strength (0.2% offset)
Elongation at Break
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Vickers
Reduction in Area
Charpy V-Notch Impact (RT)
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
Physical
Density and transition temperatures.
Density
Melting Point (Solidus)
Same in both: 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)
Max Service Temperature (continuous)
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
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)
Brazeability / Solderability
Castability
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)
Modulus of Resilience
Thermal Diffusivity
Thermal Shock Resistance Index
Same in both: Specific Stiffness (E / density) 13.1 MN·m/kg
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-DHP | Cu-ETP1 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 4 finishes: Copper Plating, Electroless Nickel (EN), Gold Plating, Silver Plating.
Cu-DHP vs Cu-ETP1 — frequently asked
Is Cu-DHP stronger than Cu-ETP1?
Yes. Cu-DHP has a typical yield strength of 220 MPa (31.9 ksi) against 70 MPa (10.2 ksi) for Cu-ETP1 — about 3.1 times as much. Tensile strength is 275 MPa (39.9 ksi) vs 220 MPa (31.9 ksi).
Which is cheaper, Cu-DHP or Cu-ETP1?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, Cu-DHP or Cu-ETP1?
Cu-ETP1, by a small margin. Both rate poor for machinability — 30/100 against 25/100 for Cu-DHP; for welding the order is Cu-DHP first (very good, 70/100) then Cu-ETP1 (fair, 50/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Cu-DHP 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.