Copper Alloy C23400 vs C28000
Copper Alloy · grade comparison
Copper Alloy C23400 and C28000 are both copper alloy grades. C23400 is the stronger of the two: yield strength 285 MPa (41.3 ksi) against 145 MPa (21 ksi) for C28000, about 97% more. In exchange, C28000 is the more ductile: elongation 45% versus 14% for C23400, and C23400 is harder (105 HB vs 75 HB). C28000 is lighter (8.39 g/cm³ vs 8.72 g/cm³ for C23400) and C23400 is stiffer (112 GPa vs 105 GPa). On the shop floor, C28000 machines more easily (good vs poor) and C28000 sits in a lower cost tier (premium, $$$) than C23400 (high, $$$$).
C23400Choose it when strength drives the design.
C28000Choose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
C23400 vs C28000: 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
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Poisson's Ratio 0.34
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)
Latent Heat of Fusion
Min Service Temperature
Same in both: 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
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Brazeability / Solderability
Polishability
Castability
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 | C23400 | C28000 |
|---|---|---|
| CNC machining | — | Yes |
| Sheet metal | — | Yes |
| Default condition | — | O |
| Relative cost | $$$$ High | $$$ Premium |
| 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.
C23400 vs C28000 — frequently asked
Is C23400 stronger than C28000?
Yes. C23400 has a typical yield strength of 285 MPa (41.3 ksi) against 145 MPa (21 ksi) for C28000 — about 97% more. Tensile strength is 355 MPa (51.5 ksi) vs 372 MPa (54 ksi).
Which is cheaper, C23400 or C28000?
C28000 is the lower-cost material: it sits in the premium tier ($$$) while C23400 is high ($$$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which is easier to machine, C23400 or C28000?
C28000. Its machinability rates good (55/100) against poor (32/100) for C23400; for welding the order is C28000 first (fair, 50/100) then C23400 (fair, 45/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C23400 and C28000 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.