Copper Alloy C99400-F vs C99400-M05
Copper Alloy · C99400 temper comparison
C99400-F and C99400-M05 are two conditions of the same copper alloy grade, C99400: F (as fabricated) versus M05 (as plaster cast). The chemistry is identical, so every difference below comes from the condition. C99400-M05 is the stronger of the two: yield strength 230 MPa (33.4 ksi) against 205 MPa (29.7 ksi) for C99400-F, about 12% more; tensile strength follows at 450 MPa (65.3 ksi) vs 415 MPa (60.2 ksi). In exchange, C99400-F is the more ductile: elongation 20% versus 18% for C99400-M05, and C99400-M05 is harder (135 HB vs 125 HB).
C99400-FChoose it when the part is bent, formed or impact-loaded.
C99400-M05Choose it when strength drives the design.
C99400-F vs C99400-M05: 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.
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
Same in both: Elastic (Young's) Modulus 117 GPa17 Msi · Shear Modulus 44 GPa6.4 Msi · Bulk Modulus 120 GPa17.4 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 8 g/cm³0.29 lb/in³ · Melting Point (Solidus) 996°C1,825 °F · Liquidus Temperature 1,024°C1,875 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 42 W/m·K24.3 BTU/hr·ft·°F · Specific Heat Capacity 376 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 16.2 µm/m·K9 µin/in·°F · Latent Heat of Fusion 205 J/g88.1 BTU/lb · Max Service Temperature (continuous) 250°C482 °F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 8 % IACS · Electrical Resistivity 2.16×10⁻⁷ Ω·m8.5 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.28 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Formability (cold)
Same in both: Weldability 40 / 100 · Castability 80 / 100 · Brazeability / Solderability 40 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 48 MJ/kg20,636 BTU/lb · Embodied Carbon (primary production) 3.4 kg CO₂/kg · Embodied Water 280 L/kg33.6 gal/lb · Typical Recycled Content 70%
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.
C99400-F vs C99400-M05 — frequently asked
Is C99400-M05 stronger than C99400-F?
Yes. C99400-M05 has a typical yield strength of 230 MPa (33.4 ksi) against 205 MPa (29.7 ksi) for C99400-F — about 12% more. Tensile strength is 450 MPa (65.3 ksi) vs 415 MPa (60.2 ksi).
Which condition does FabDigit quote by default, F or M05?
F is the default C99400 condition in the FabDigit quote flow. The other condition is available on request or by drawing note — specify it in the material field or the part notes and the quote is priced for it.
When should I choose C99400-F over C99400-M05?
Pick C99400-F when the part is bent, formed or impact-loaded. Pick C99400-M05 when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C99400-F and C99400-M05 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.