Copper Alloy C71900-TD04 vs C71900-TH02
Copper Alloy · C71900 temper comparison
C71900-TD04 and C71900-TH02 are two conditions of the same copper alloy grade, C71900: TD04 (solution heat treated and cold worked, full hard) versus TH02 (TD02 and precipitation hardened). The chemistry is identical, so every difference below comes from the condition. C71900-TH02 is the stronger of the two: yield strength 830 MPa (120 ksi) against 620 MPa (89.9 ksi) for C71900-TD04, about 34% more; tensile strength follows at 900 MPa (131 ksi) vs 700 MPa (102 ksi). C71900-TH02 is harder — 288 HB against 218 HB for C71900-TD04 — which matters for wear surfaces and threads. C71900-TH02 runs hotter in service (300°C vs 250°C continuous) and C71900-TH02 conducts heat better (34 W/m·K vs 28 W/m·K).
C71900-TH02Choose it when strength drives the design, or when surface hardness matters.
C71900-TD04 vs C71900-TH02: 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)
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
Hardness, Vickers
Same in both: Shear Modulus 57 GPa8.3 Msi · Bulk Modulus 150 GPa21.8 Msi · Poisson's Ratio 0.33 · Elongation at Break 6% · Reduction in Area 25%
Physical
Density and transition temperatures.
Same in both: Density 8.94 g/cm³0.32 lb/in³ · Melting Point (Solidus) 1,200°C2,192 °F · Liquidus Temperature 1,240°C2,264 °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) 15.5 µm/m·K8.6 µin/in·°F · Latent Heat of Fusion 205 J/g88.1 BTU/lb · Min Service Temperature -196°C-321 °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
Same in both: Formability (cold) 25 / 100 · Brazeability / Solderability 70 / 100 · Polishability 80 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 75 MJ/kg32,244 BTU/lb · Embodied Carbon (primary production) 5.5 kg CO₂/kg · Embodied Water 320 L/kg38.3 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.
C71900-TD04 vs C71900-TH02 — frequently asked
Is C71900-TH02 stronger than C71900-TD04?
Yes. C71900-TH02 has a typical yield strength of 830 MPa (120 ksi) against 620 MPa (89.9 ksi) for C71900-TD04 — about 34% more. Tensile strength is 900 MPa (131 ksi) vs 700 MPa (102 ksi).
Which condition does FabDigit quote by default, TD04 or TH02?
TF00 is the default C71900 condition in the FabDigit quote flow (neither TD04 nor TH02). 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, C71900-TD04 or C71900-TH02?
C71900-TD04. Its machinability rates fair (35/100) against poor (30/100) for C71900-TH02; for welding the order is C71900-TD04 first (fair, 48/100) then C71900-TH02 (fair, 40/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C71900-TD04 and C71900-TH02 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.