Copper Alloy C72700-TD01 vs C72700-TH04
Copper Alloy · C72700 temper comparison
C72700-TD01 and C72700-TH04 are two conditions of the same copper alloy grade, C72700: TD01 (solution heat treated and cold worked, quarter hard) versus TH04 (TD04 and precipitation hardened). The chemistry is identical, so every difference below comes from the condition. C72700-TH04 is the stronger of the two: yield strength 900 MPa (131 ksi) against 450 MPa (65.3 ksi) for C72700-TD01, about 100% more; tensile strength follows at 950 MPa (138 ksi) vs 560 MPa (81.2 ksi). In exchange, C72700-TD01 is the more ductile: elongation 15% versus 4% for C72700-TH04, and C72700-TH04 is harder (29 HRC vs 23 HRC). C72700-TH04 is stiffer (132 GPa vs 125 GPa) and C72700-TH04 runs hotter in service (200°C vs 150°C continuous).
C72700-TD01Choose it when the part is bent, formed or impact-loaded.
C72700-TH04Choose it when strength drives the design, or when the part sees heat.
C72700-TD01 vs C72700-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.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Rockwell B
Hardness, Rockwell C
Hardness, Vickers
Same in both: Shear Modulus 50 GPa7.3 Msi · Bulk Modulus 125 GPa18.1 Msi · Poisson's Ratio 0.31
Physical
Density and transition temperatures.
Same in both: Density 8.86 g/cm³0.32 lb/in³ · Melting Point (Solidus) 1,060°C1,940 °F · Liquidus Temperature 1,120°C2,048 °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 377 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
Formability (cold)
Same in both: Brazeability / Solderability 70 / 100 · Polishability 80 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 68 MJ/kg29,235 BTU/lb · Embodied Carbon (primary production) 4.8 kg CO₂/kg · Embodied Water 250 L/kg30 gal/lb · Typical Recycled Content 25%
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.
C72700-TD01 vs C72700-TH04 — frequently asked
Is C72700-TH04 stronger than C72700-TD01?
Yes. C72700-TH04 has a typical yield strength of 900 MPa (131 ksi) against 450 MPa (65.3 ksi) for C72700-TD01 — about 100% more. Tensile strength is 950 MPa (138 ksi) vs 560 MPa (81.2 ksi).
Which condition does FabDigit quote by default, TD01 or TH04?
TH01 is the default C72700 condition in the FabDigit quote flow (neither TD01 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, C72700-TD01 or C72700-TH04?
C72700-TH04, by a small margin. Both rate poor for machinability — 32/100 against 26/100 for C72700-TD01.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C72700-TD01 and C72700-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.