Copper Alloy C72500 vs C74500
Copper Alloy · grade comparison
Copper Alloy C72500 and C74500 are both copper alloy grades. C72500 is the stronger of the two: yield strength 480 MPa (69.6 ksi) against 400 MPa (58 ksi) for C74500, about 20% more. In exchange, C74500 is the more ductile: elongation 12% versus 9% for C72500, and C72500 is harder (172 HV vs 158 HV). C72500 is stiffer (138 GPa vs 127 GPa) and C74500 runs hotter in service (180°C vs 150°C continuous). On the shop floor, C72500 welds better (good vs fair).
C72500Choose it when strength drives the design, or when it will be welded.
C74500Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C72500 vs C74500: 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
Fatigue Strength (Endurance Limit)
Hardness, Rockwell B
Hardness, Vickers
Hardness, Brinell
Same in both: Shear Strength 330 MPa47.9 ksi
Physical
Density and transition temperatures.
Density
Melting Point (Solidus)
Liquidus Temperature
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Latent Heat of Fusion
Same in both: Thermal Conductivity 45 W/m·K26 BTU/hr·ft·°F · Specific Heat Capacity 377 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 16.2 µm/m·K9 µin/in·°F · Min Service Temperature -200°C-328 °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 Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Brazeability / Solderability
Polishability
Same in both: Machinability 30 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Typical Recycled Content
Same in both: Embodied Water 260 L/kg31.2 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 11
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 | C72500 | C74500 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 4 finishes: Copper Plating, Electroless Nickel (EN), Gold Plating, Silver Plating.
C72500 vs C74500 — frequently asked
Is C72500 stronger than C74500?
Yes. C72500 has a typical yield strength of 480 MPa (69.6 ksi) against 400 MPa (58 ksi) for C74500 — about 20% more. Tensile strength is 530 MPa (76.9 ksi) vs 510 MPa (74 ksi).
Which is cheaper, C72500 or C74500?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which welds better, C72500 or C74500?
C72500. Its weldability rates good (55/100) against fair (40/100) for C74500.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C72500 and C74500 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.