Copper Alloy C73200 vs C74500
Copper Alloy · grade comparison
Copper Alloy C73200 and C74500 are both copper alloy grades. C74500 is the stronger of the two: yield strength 400 MPa (58 ksi) against 380 MPa (55.1 ksi) for C73200, about 5% more; tensile strength follows at 510 MPa (74 ksi) vs 470 MPa (68.2 ksi). C74500 is harder — 150 HB against 130 HB for C73200 — which matters for wear surfaces and threads. C73200 runs hotter in service (200°C vs 180°C continuous) and C73200 conducts electricity better (11 % IACS vs 9 % IACS). On the shop floor, C73200 welds better (good vs fair) and C73200 forms better (very good vs good).
C73200Choose it when the part sees heat, or when it will be welded.
C74500Choose it when strength drives the design, or when surface hardness matters.
C73200 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
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Reduction in Area
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Poisson's Ratio 0.33 · Elongation at Break 12%
Physical
Density and transition temperatures.
Melting Point (Solidus)
Liquidus Temperature
Same in both: Density 8.73 g/cm³0.32 lb/in³
Thermal
How each material carries heat and how hot it can run.
Latent Heat of Fusion
Max Service Temperature (continuous)
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
Weldability
Formability (cold)
Brazeability / Solderability
Same in both: Machinability Rating (AISI 1212 = 100 %) 20% · Polishability 90 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Same in both: Embodied Water 260 L/kg31.2 gal/lb · Typical Recycled Content 40%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Shock Resistance Index
Same in both: Thermal Diffusivity 13.7 mm²/s
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 | C73200 | C74500 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 4 finishes: Copper Plating, Electroless Nickel (EN), Gold Plating, Silver Plating.
C73200 vs C74500 — frequently asked
Is C74500 stronger than C73200?
Yes. C74500 has a typical yield strength of 400 MPa (58 ksi) against 380 MPa (55.1 ksi) for C73200 — about 5% more. Tensile strength is 510 MPa (74 ksi) vs 470 MPa (68.2 ksi).
Which is cheaper, C73200 or C74500?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, C73200 or C74500?
C74500, by a small margin. Both rate poor for machinability — 30/100 against 25/100 for C73200; for welding the order is C73200 first (good, 55/100) then C74500 (fair, 40/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C73200 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.