Copper Alloy C85800 vs C86300
Copper Alloy · grade comparison
Copper Alloy C85800 and C86300 are both copper alloy grades. C86300 is the stronger of the two: yield strength 470 MPa (68.2 ksi) against 205 MPa (29.7 ksi) for C85800, about 129% more; tensile strength follows at 820 MPa (119 ksi) vs 379 MPa (55 ksi). C86300 is harder — 225 HB against 55 HB for C85800 — which matters for wear surfaces and threads. C86300 is lighter (7.65 g/cm³ vs 8.5 g/cm³ for C85800) and C85800 conducts heat better (84 W/m·K vs 36 W/m·K). On the shop floor, C85800 machines more easily (very good vs poor), C86300 welds better (30 vs 20 out of 100), and C85800 sits in a lower cost tier (premium, $$$) than C86300 (specialty, $$$$$).
C85800Choose it when the part is machined in volume, or when cost is the deciding factor.
C86300Choose it when strength drives the design, or when surface hardness matters.
C85800 vs C86300: 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)
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Rockwell B
Reduction in Area
Compressive Strength
Charpy V-Notch Impact (RT)
Same in both: Elastic (Young's) Modulus 103 GPa14.9 Msi · Shear Modulus 39 GPa5.7 Msi · Bulk Modulus 107 GPa15.5 Msi · Poisson's Ratio 0.34 · Elongation at Break 15%
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
Same in both: Max Service Temperature (continuous) 200°C392 °F · Min Service Temperature -100°C-148 °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 45 / 100
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)
Typical Recycled Content
Same in both: Embodied Water 200 L/kg24 gal/lb
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Same in both: Thermal Shock Resistance Index 15
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 | C85800 | C86300 |
|---|---|---|
| CNC machining | — | Yes |
| Default condition | — | As Cast |
| Relative cost | $$$ Premium | $$$$$ Specialty |
| Min. machined wall | — | 0.8 mm |
| Best machined surface | — | Ra 1.6 µm |
| Chrome Plating | — | Yes |
| Electropolishing | — | Yes |
| Nickel Plating | — | Yes |
| Painting | — | Yes |
| Tin Plating | — | Yes |
They share 4 finishes: Copper Plating, Electroless Nickel (EN), Gold Plating, Silver Plating.
C85800 vs C86300 — frequently asked
Is C86300 stronger than C85800?
Yes. C86300 has a typical yield strength of 470 MPa (68.2 ksi) against 205 MPa (29.7 ksi) for C85800 — about 129% more. Tensile strength is 820 MPa (119 ksi) vs 379 MPa (55 ksi).
Which is cheaper, C85800 or C86300?
C85800 is the lower-cost material: it sits in the premium tier ($$$) while C86300 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 is easier to machine, C85800 or C86300?
C85800. Its machinability rates very good (80/100) against poor (25/100) for C86300; for welding the order is C86300 first (poor, 30/100) then C85800 (poor, 20/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C85800 and C86300 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.