Copper Alloy C28000 vs C28500
Copper Alloy · grade comparison
Copper Alloy C28000 and C28500 are both copper alloy grades. Both yield at about 145 MPa — strength does not separate them. C28000 is harder — 75 HB against 70 HB for C28500 — which matters for wear surfaces and threads. On the shop floor, C28000 machines more easily (good vs fair), C28000 forms better (good vs fair), and C28000 sits in a lower cost tier (premium, $$$) than C28500 (high, $$$$).
C28000Choose it when surface hardness matters, or when the part is machined in volume.
C28000 vs C28500: 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.
Bulk Modulus
Tensile Strength (Ultimate)
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Reduction in Area
Charpy V-Notch Impact (RT)
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 105 GPa15.2 Msi · Shear Modulus 39 GPa5.7 Msi · Poisson's Ratio 0.34 · Yield Strength (0.2% offset) 145 MPa21 ksi · Elongation at Break 45% · Hardness, Rockwell B 35 HRB
Physical
Density and transition temperatures.
Melting Point (Solidus)
Liquidus Temperature
Same in both: Density 8.39 g/cm³0.3 lb/in³
Thermal
How each material carries heat and how hot it can run.
Latent Heat of Fusion
Min Service Temperature
Same in both: Thermal Conductivity 123 W/m·K71.1 BTU/hr·ft·°F · Specific Heat Capacity 375 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 20.8 µm/m·K11.6 µin/in·°F · Max Service Temperature (continuous) 200°C392 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 28 % IACS · Electrical Resistivity 6.2×10⁻⁸ Ω·m2.44 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Galvanic Potential (seawater, vs SCE)
Same in both: Corrosion Resistance 45 / 100
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 %) 40%
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)
Same in both: Specific Stiffness (E / density) 12.5 MN·m/kg · Modulus of Resilience 100 kJ/m³ · Thermal Diffusivity 39.1 mm²/s · Thermal Shock Resistance Index 21
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 | C28000 | C28500 |
|---|---|---|
| CNC machining | Yes | — |
| Sheet metal | Yes | — |
| Default condition | O | — |
| Relative cost | $$$ Premium | $$$$ High |
| Min. machined wall | 0.8 mm | — |
| Best machined surface | Ra 1.6 µm | — |
| Chrome Plating | Yes | — |
| Electropolishing | Yes | — |
| Nickel Plating | Yes | — |
| Painting | Yes | — |
| Tin Plating | Yes | — |
They share 4 finishes: Copper Plating, Electroless Nickel (EN), Gold Plating, Silver Plating.
C28000 vs C28500 — frequently asked
What is the difference between C28000 and C28500?
Copper Alloy C28000 and C28500 are both copper alloy grades. Both yield at about 145 MPa — strength does not separate them. C28000 is harder — 75 HB against 70 HB for C28500 — which matters for wear surfaces and threads.
Which is cheaper, C28000 or C28500?
C28000 is the lower-cost material: it sits in the premium tier ($$$) while C28500 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, C28000 or C28500?
C28000. Its machinability rates good (55/100) against fair (45/100) for C28500; for welding the order is C28000 first (fair, 50/100) then C28500 (fair, 45/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C28000 and C28500 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.