Copper Alloy C90300 vs C95400
Copper Alloy · grade comparison
Copper Alloy C90300 and C95400 are both copper alloy grades. C95400 is the stronger of the two: yield strength 241 MPa (35 ksi) against 145 MPa (21 ksi) for C90300, about 66% more; tensile strength follows at 586 MPa (85 ksi) vs 310 MPa (45 ksi). In exchange, C90300 is the more ductile: elongation 30% versus 12% for C95400, and C95400 is harder (170 HB vs 70 HB). C95400 is lighter (7.45 g/cm³ vs 8.8 g/cm³ for C90300) and C95400 is stiffer (110 GPa vs 103 GPa). On the shop floor, C95400 welds better (good vs fair) and C90300 sits in a lower cost tier (high, $$$$) than C95400 (specialty, $$$$$).
C90300Choose it when the part is bent, formed or impact-loaded, or when cost is the deciding factor.
C95400Choose it when strength drives the design, or when weight is the constraint.
C90300 vs C95400: 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
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
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)
Latent Heat of Fusion
Max Service Temperature (continuous)
Same in both: Min Service Temperature -196°C-321 °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
Weldability
Formability (cold)
Castability
Brazeability / Solderability
Machinability Rating (AISI 1212 = 100 %)
Same in both: Polishability 70 / 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 | C90300 | C95400 |
|---|---|---|
| CNC machining | — | Yes |
| Default condition | — | As Cast |
| Relative cost | $$$$ High | $$$$$ Specialty |
| Min. machined wall | — | 0.8 mm |
| Best machined surface | — | Ra 1.6 µm |
| Chrome Plating | — | Yes |
| Electropolishing | — | Yes |
| Nickel Plating | — | Yes |
| Painting | — | Yes |
| Tin Plating | — | Yes |
They share 4 finishes: Copper Plating, Electroless Nickel (EN), Gold Plating, Silver Plating.
C90300 vs C95400 — frequently asked
Is C95400 stronger than C90300?
Yes. C95400 has a typical yield strength of 241 MPa (35 ksi) against 145 MPa (21 ksi) for C90300 — about 66% more. Tensile strength is 586 MPa (85 ksi) vs 310 MPa (45 ksi).
Which is cheaper, C90300 or C95400?
C90300 is the lower-cost material: it sits in the high tier ($$$$) while C95400 is specialty ($$$$$). 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, C90300 or C95400?
C90300. Its machinability rates good (55/100) against fair (48/100) for C95400; for welding the order is C95400 first (good, 60/100) then C90300 (fair, 35/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C90300 and C95400 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.