Copper Alloy C63000 vs C65500
Copper Alloy · grade comparison
Copper Alloy C63000 and C65500 are both copper alloy grades. C63000 is the stronger of the two: yield strength 415 MPa (60.2 ksi) against 165 MPa (23.9 ksi) for C65500, about 152% more; tensile strength follows at 760 MPa (110 ksi) vs 400 MPa (58 ksi). In exchange, C65500 is the more ductile: elongation 60% versus 15% for C63000, and C63000 is harder (197 HB vs 78 HB). C63000 is lighter (7.58 g/cm³ vs 8.53 g/cm³ for C65500) and C63000 is stiffer (117 GPa vs 103 GPa). On the shop floor, C65500 welds better (excellent vs good).
C63000Choose it when strength drives the design, or when weight is the constraint.
C65500Choose it when the part is bent, formed or impact-loaded, or when it will be welded.
C63000 vs C65500: 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
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
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)
Max Service Temperature (continuous)
Min Service Temperature
Same in both: Latent Heat of Fusion 210 J/g90.3 BTU/lb
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 7 % IACS · Electrical Resistivity 2.46×10⁻⁷ Ω·m9.69 µΩ·in
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
Polishability
Castability
Same in both: Machinability Rating (AISI 1212 = 100 %) 30%
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Typical Recycled Content
Same in both: Embodied Water 250 L/kg30 gal/lb
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 | C63000 | C65500 |
|---|---|---|
| Default condition | HR50 | O |
| Relative cost | $$$$$ Specialty | $$$$$ Specialty |
| Min. machined wall | 0.8 mm | 0.8 mm |
| Best machined surface | Ra 1.6 µm | Ra 1.6 µm |
Both are offered for CNC machining and Sheet metal. Both take the same 9 finishes: Chrome Plating, Copper Plating, Electroless Nickel (EN), Electropolishing, Gold Plating, Nickel Plating, Painting, Silver Plating, Tin Plating.
C63000 vs C65500 — frequently asked
Is C63000 stronger than C65500?
Yes. C63000 has a typical yield strength of 415 MPa (60.2 ksi) against 165 MPa (23.9 ksi) for C65500 — about 152% more. Tensile strength is 760 MPa (110 ksi) vs 400 MPa (58 ksi).
Which is cheaper, C63000 or C65500?
Both sit in the same relative cost tier ($$$$$, specialty); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which welds better, C63000 or C65500?
C65500. Its weldability rates excellent (92/100) against good (65/100) for C63000.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C63000 and C65500 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.