Copper Alloy C99750 M-AC vs C99750-TF00
Copper Alloy · C99750 temper comparison
C99750 M-AC and C99750-TF00 are two conditions of the same copper alloy grade, C99750: M-AC (as Cast) versus TF00 (solution heat treated and precipitation hardened). The chemistry is identical, so every difference below comes from the condition. C99750-TF00 is the stronger of the two: yield strength 415 MPa (60.2 ksi) against 234 MPa (33.9 ksi) for C99750 M-AC, about 77% more; tensile strength follows at 620 MPa (89.9 ksi) vs 455 MPa (66 ksi). In exchange, C99750 M-AC is the more ductile: elongation 25% versus 10% for C99750-TF00, and C99750-TF00 is harder (200 HB vs 130 HB). C99750 M-AC runs hotter in service (250°C vs 200°C continuous) and C99750-TF00 conducts electricity better (4.5 % IACS vs 3.5 % IACS). On the shop floor, C99750-TF00 machines more easily (45 vs 35 out of 100) and C99750 M-AC welds better (fair vs poor).
C99750 M-ACChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C99750-TF00Choose it when strength drives the design, or when the part is machined in volume.
C99750 M-AC vs C99750-TF00: 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
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Same in both: Shear Modulus 38 GPa5.5 Msi · Bulk Modulus 105 GPa15.2 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 7.78 g/cm³0.28 lb/in³ · Melting Point (Solidus) 871°C1,600 °F · Liquidus Temperature 899°C1,650 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 400 J/kg·K0.1 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 20 µm/m·K11.1 µin/in·°F · Latent Heat of Fusion 200 J/g86 BTU/lb · Min Service Temperature -100°C-148 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Same in both: Electrical Resistivity 4.9×10⁻⁷ Ω·m19.3 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
Machinability Rating (AISI 1212 = 100 %)
Weldability
Same in both: Formability (cold) 25 / 100 · Castability 75 / 100 · Brazeability / Solderability 45 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 45 MJ/kg19,347 BTU/lb · Embodied Carbon (primary production) 3.2 kg CO₂/kg · Embodied Water 300 L/kg35.9 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.
C99750 M-AC vs C99750-TF00 — frequently asked
Is C99750-TF00 stronger than C99750 M-AC?
Yes. C99750-TF00 has a typical yield strength of 415 MPa (60.2 ksi) against 234 MPa (33.9 ksi) for C99750 M-AC — about 77% more. Tensile strength is 620 MPa (89.9 ksi) vs 455 MPa (66 ksi).
Which condition does FabDigit quote by default, M-AC or TF00?
M-AC is the default C99750 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.
Which is easier to machine, C99750 M-AC or C99750-TF00?
C99750-TF00, by a small margin. Both rate fair for machinability — 45/100 against 35/100 for C99750 M-AC; for welding the order is C99750 M-AC first (fair, 45/100) then C99750-TF00 (poor, 25/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C99750 M-AC and C99750-TF00 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.