Copper Alloy C74400 vs C79200
Copper Alloy · grade comparison
Copper Alloy C74400 and C79200 are both copper alloy grades. C79200 is the stronger of the two: yield strength 510 MPa (74 ksi) against 440 MPa (63.8 ksi) for C74400, about 16% more; tensile strength follows at 585 MPa (84.8 ksi) vs 515 MPa (74.7 ksi). In exchange, C74400 is the more ductile: elongation 12% versus 5% for C79200, and C79200 is harder (180 HB vs 138 HB). C74400 runs hotter in service (200°C vs 175°C continuous). On the shop floor, C79200 machines more easily (very good vs poor) and C74400 welds better (fair vs poor).
C74400Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C79200Choose it when strength drives the design, or when the part is machined in volume.
C74400 vs C79200: 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.
Bulk Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Shear Strength
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Reduction in Area
Compressive Strength
Charpy V-Notch Impact (RT)
Hardness, Rockwell C
Same in both: Elastic (Young's) Modulus 124 GPa18 Msi · Shear Modulus 46 GPa6.7 Msi · Fatigue Strength (Endurance Limit) 200 MPa29 ksi
Physical
Density and transition temperatures.
Melting Point (Solidus)
Liquidus Temperature
Same in both: Density 8.7 g/cm³0.31 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
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Brazeability / Solderability
Polishability
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)
Modulus of Resilience
Thermal Shock Resistance Index
Same in both: Specific Stiffness (E / density) 14.3 MN·m/kg · 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 | C74400 | C79200 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 4 finishes: Copper Plating, Electroless Nickel (EN), Gold Plating, Silver Plating.
C74400 vs C79200 — frequently asked
Is C79200 stronger than C74400?
Yes. C79200 has a typical yield strength of 510 MPa (74 ksi) against 440 MPa (63.8 ksi) for C74400 — about 16% more. Tensile strength is 585 MPa (84.8 ksi) vs 515 MPa (74.7 ksi).
Which is cheaper, C74400 or C79200?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, C74400 or C79200?
C79200. Its machinability rates very good (75/100) against poor (25/100) for C74400; for welding the order is C74400 first (fair, 52/100) then C79200 (poor, 20/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C74400 and C79200 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.