Copper Alloy C81540-TB00 vs C81540-TF00
Copper Alloy · C81540 temper comparison
C81540-TB00 and C81540-TF00 are two conditions of the same copper alloy grade, C81540: TB00 (solution heat treated) versus TF00 (solution heat treated and precipitation hardened). The chemistry is identical, so every difference below comes from the condition. C81540-TF00 is the stronger of the two: yield strength 480 MPa (69.6 ksi) against 150 MPa (21.8 ksi) for C81540-TB00, about 3.2 times as much; tensile strength follows at 620 MPa (89.9 ksi) vs 330 MPa (47.9 ksi). In exchange, C81540-TB00 is the more ductile: elongation 30% versus 11% for C81540-TF00, and C81540-TF00 is harder (185 HB vs 80 HB). C81540-TF00 runs hotter in service (450°C vs 200°C continuous) and C81540-TF00 conducts heat better (200 W/m·K vs 95 W/m·K). On the shop floor, C81540-TF00 machines more easily (good vs fair) and C81540-TB00 welds better (50 vs 35 out of 100).
C81540-TB00Choose it when the part is bent, formed or impact-loaded, or when it will be welded.
C81540-TF00Choose it when strength drives the design, or when the part sees heat.
C81540-TB00 vs C81540-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
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: 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).
Same in both: Galvanic Potential (seawater, vs SCE) -0.25 V · Corrosion Resistance 60 / 100
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-TB00 vs C81540-TF00 — frequently asked
Is C81540-TF00 stronger than C81540-TB00?
Yes. C81540-TF00 has a typical yield strength of 480 MPa (69.6 ksi) against 150 MPa (21.8 ksi) for C81540-TB00 — about 3.2 times as much. Tensile strength is 620 MPa (89.9 ksi) vs 330 MPa (47.9 ksi).
Which condition does FabDigit quote by default, TB00 or TF00?
TF00 is the default C81540 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, C81540-TB00 or C81540-TF00?
C81540-TF00. Its machinability rates good (55/100) against fair (40/100) for C81540-TB00; for welding the order is C81540-TB00 first (fair, 50/100) then C81540-TF00 (fair, 35/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C81540-TB00 and C81540-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.