Copper Alloy C84400 vs ZCuPb20Sn5
Copper Alloy · grade comparison
Copper Alloy C84400 and ZCuPb20Sn5 are both copper alloy grades. C84400 is the stronger of the two: yield strength 110 MPa (16 ksi) against 65 MPa (9.43 ksi) for ZCuPb20Sn5, about 69% more; tensile strength follows at 234 MPa (33.9 ksi) vs 175 MPa (25.4 ksi). C84400 is the more ductile: elongation 26% versus 9% for ZCuPb20Sn5. C84400 is lighter (8.8 g/cm³ vs 9.35 g/cm³ for ZCuPb20Sn5) and C84400 is stiffer (95 GPa vs 72 GPa). On the shop floor, C84400 welds better (poor vs not recommended) and ZCuPb20Sn5 sits in a lower cost tier (high, $$$$) than C84400 (specialty, $$$$$).
C84400Choose it when strength drives the design, or when the part is bent, formed or impact-loaded.
ZCuPb20Sn5Choose it when cost is the deciding factor.
C84400 vs ZCuPb20Sn5: 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
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Rockwell B
Hardness, Vickers
Same in both: Hardness, Brinell 55 HB
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
Thermal Expansion (CTE, 20–100 °C)
Latent Heat of Fusion
Min Service Temperature
Same in both: Specific Heat Capacity 377 J/kg·K0.09 BTU/lb·°F · Max Service Temperature (continuous) 200°C392 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.28 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Castability
Brazeability / Solderability
Polishability
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 | C84400 | ZCuPb20Sn5 |
|---|---|---|
| CNC machining | Yes | — |
| Default condition | As Cast | — |
| Relative cost | $$$$$ Specialty | $$$$ High |
| Min. machined wall | 0.8 mm | — |
| Best machined surface | Ra 1.6 µm | — |
| Chrome Plating | Yes | — |
| Electropolishing | Yes | — |
| Nickel Plating | Yes | — |
| Painting | Yes | — |
| Tin Plating | Yes | — |
They share 4 finishes: Copper Plating, Electroless Nickel (EN), Gold Plating, Silver Plating.
C84400 vs ZCuPb20Sn5 — frequently asked
Is C84400 stronger than ZCuPb20Sn5?
Yes. C84400 has a typical yield strength of 110 MPa (16 ksi) against 65 MPa (9.43 ksi) for ZCuPb20Sn5 — about 69% more. Tensile strength is 234 MPa (33.9 ksi) vs 175 MPa (25.4 ksi).
Which is cheaper, C84400 or ZCuPb20Sn5?
ZCuPb20Sn5 is the lower-cost material: it sits in the high tier ($$$$) while C84400 is specialty ($$$$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which welds better, C84400 or ZCuPb20Sn5?
C84400. Its weldability rates poor (20/100) against not recommended (10/100) for ZCuPb20Sn5.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C84400 and ZCuPb20Sn5 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.