Copper Alloy C72650-TD04 vs C72650-TH04
Copper Alloy · C72650 temper comparison
C72650-TD04 and C72650-TH04 are two conditions of the same copper alloy grade, C72650: TD04 (solution heat treated and cold worked, full hard) versus TH04 (TD04 and precipitation hardened). The chemistry is identical, so every difference below comes from the condition. C72650-TH04 is the stronger of the two: yield strength 620 MPa (89.9 ksi) against 580 MPa (84.1 ksi) for C72650-TD04, about 7% more; tensile strength follows at 720 MPa (104 ksi) vs 660 MPa (95.7 ksi). C72650-TH04 is the more ductile: elongation 12% versus 9% for C72650-TD04, and C72650-TH04 is harder (285 HB vs 210 HB). C72650-TH04 runs hotter in service (250°C vs 200°C continuous) and C72650-TH04 conducts heat better (50 W/m·K vs 44 W/m·K).
C72650-TH04Choose it when strength drives the design, or when the part is bent, formed or impact-loaded.
C72650-TD04 vs C72650-TH04: 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
Reduction in Area
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Rockwell C
Same in both: Elastic (Young's) Modulus 135 GPa19.6 Msi · Shear Modulus 51 GPa7.4 Msi · Bulk Modulus 113 GPa16.4 Msi · Poisson's Ratio 0.3
Physical
Density and transition temperatures.
Same in both: Density 8.85 g/cm³0.32 lb/in³ · Melting Point (Solidus) 1,030°C1,886 °F · Liquidus Temperature 1,100°C2,012 °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 380 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 16.5 µm/m·K9.2 µin/in·°F · Latent Heat of Fusion 200 J/g86 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 72 / 100
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) 35 / 100 · Brazeability / Solderability 60 / 100 · Polishability 85 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 65 MJ/kg27,945 BTU/lb · Embodied Carbon (primary production) 4.2 kg CO₂/kg · Embodied Water 260 L/kg31.2 gal/lb · Typical Recycled Content 30%
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.
C72650-TD04 vs C72650-TH04 — frequently asked
Is C72650-TH04 stronger than C72650-TD04?
Yes. C72650-TH04 has a typical yield strength of 620 MPa (89.9 ksi) against 580 MPa (84.1 ksi) for C72650-TD04 — about 7% more. Tensile strength is 720 MPa (104 ksi) vs 660 MPa (95.7 ksi).
Which condition does FabDigit quote by default, TD04 or TH04?
CX105 is the default C72650 condition in the FabDigit quote flow (neither TD04 nor TH04). 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, C72650-TD04 or C72650-TH04?
C72650-TH04, by a small margin. Both rate very good for machinability — 80/100 against 72/100 for C72650-TD04; for welding the order is C72650-TD04 first (fair, 40/100) then C72650-TH04 (fair, 35/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C72650-TD04 and C72650-TH04 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.