Copper Alloy C35300 vs C46400
Copper Alloy · grade comparison
Copper Alloy C35300 and C46400 are both copper alloy grades. C35300 is the stronger of the two: yield strength 345 MPa (50 ksi) against 172 MPa (24.9 ksi) for C46400, about 101% more; tensile strength follows at 420 MPa (60.9 ksi) vs 380 MPa (55.1 ksi). In exchange, C46400 is the more ductile: elongation 48% versus 20% for C35300, and C35300 is harder (115 HB vs 95 HB). C46400 runs hotter in service (200°C vs 150°C continuous). On the shop floor, C35300 machines more easily (very good vs fair) and C46400 welds better (fair vs poor).
C35300Choose it when strength drives the design, or when the part is machined in volume.
C46400Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C35300 vs C46400: 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
Bulk Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Reduction in Area
Charpy V-Notch Impact (RT)
Same in both: Shear Modulus 37 GPa5.4 Msi · 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
Thermal Expansion (CTE, 20–100 °C)
Latent Heat of Fusion
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 380 J/kg·K0.09 BTU/lb·°F · Min Service Temperature -200°C-328 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 26 % IACS · Electrical Resistivity 6.6×10⁻⁸ Ω·m2.6 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
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Brazeability / Solderability
Castability
Same in both: Polishability 75 / 100
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 | C35300 | C46400 |
|---|---|---|
| Sheet metal | — | Yes |
| Default condition | H02 | O |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | 0.8 mm | 0.8 mm |
| Best machined surface | Ra 1.6 µm | Ra 0.8 µm |
Both are offered for CNC machining. Both take the same 9 finishes: Chrome Plating, Copper Plating, Electroless Nickel (EN), Electropolishing, Gold Plating, Nickel Plating, Painting, Silver Plating, Tin Plating.
C35300 vs C46400 — frequently asked
Is C35300 stronger than C46400?
Yes. C35300 has a typical yield strength of 345 MPa (50 ksi) against 172 MPa (24.9 ksi) for C46400 — about 101% more. Tensile strength is 420 MPa (60.9 ksi) vs 380 MPa (55.1 ksi).
Which is cheaper, C35300 or C46400?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, C35300 or C46400?
C35300. Its machinability rates very good (70/100) against fair (35/100) for C46400; for welding the order is C46400 first (fair, 45/100) then C35300 (poor, 15/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C35300 and C46400 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.