Copper Alloy C81540-M05 vs C81540-TB00
Copper Alloy · C81540 temper comparison
C81540-M05 and C81540-TB00 are two conditions of the same copper alloy grade, C81540: M05 (as plaster cast) versus TB00 (solution heat treated). The chemistry is identical, so every difference below comes from the condition. C81540-M05 is the stronger of the two: yield strength 185 MPa (26.8 ksi) against 150 MPa (21.8 ksi) for C81540-TB00, about 23% more; tensile strength follows at 380 MPa (55.1 ksi) vs 330 MPa (47.9 ksi). In exchange, C81540-TB00 is the more ductile: elongation 30% versus 20% for C81540-M05, and C81540-M05 is harder (100 HB vs 80 HB). C81540-M05 runs hotter in service (300°C vs 200°C continuous) and C81540-M05 conducts heat better (140 W/m·K vs 95 W/m·K). On the shop floor, C81540-M05 machines more easily (good vs fair).
C81540-M05Choose it when strength drives the design, or when the part sees heat.
C81540-TB00Choose it when the part is bent, formed or impact-loaded.
C81540-M05 vs C81540-TB00: 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
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 128 GPa18.6 Msi · Shear Modulus 49 GPa7.1 Msi · Bulk Modulus 130 GPa18.9 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 8.61 g/cm³0.31 lb/in³ · Melting Point (Solidus) 1,030°C1,886 °F · Liquidus Temperature 1,075°C1,967 °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 376 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 17 µm/m·K9.4 µin/in·°F · Latent Heat of Fusion 205 J/g88.1 BTU/lb · Min Service Temperature -200°C-328 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.25 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Same in both: Castability 65 / 100 · Brazeability / Solderability 60 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 58 MJ/kg24,936 BTU/lb · Embodied Carbon (primary production) 3.8 kg CO₂/kg · Embodied Water 260 L/kg31.2 gal/lb · Typical Recycled Content 45%
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.
C81540-M05 vs C81540-TB00 — frequently asked
Is C81540-M05 stronger than C81540-TB00?
Yes. C81540-M05 has a typical yield strength of 185 MPa (26.8 ksi) against 150 MPa (21.8 ksi) for C81540-TB00 — about 23% more. Tensile strength is 380 MPa (55.1 ksi) vs 330 MPa (47.9 ksi).
Which condition does FabDigit quote by default, M05 or TB00?
TF00 is the default C81540 condition in the FabDigit quote flow (neither M05 nor TB00). 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, C81540-M05 or C81540-TB00?
C81540-M05. Its machinability rates good (60/100) against fair (40/100) for C81540-TB00; for welding the order is C81540-TB00 first (fair, 50/100) then C81540-M05 (fair, 45/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C81540-M05 and C81540-TB00 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.