Copper Alloy C15000-O61 vs C15000-TH04
Copper Alloy · C15000 temper comparison
C15000-O61 and C15000-TH04 are two conditions of the same copper alloy grade, C15000: O61 (annealed) versus TH04 (TD04 and precipitation hardened). The chemistry is identical, so every difference below comes from the condition. C15000-TH04 is the stronger of the two: yield strength 450 MPa (65.3 ksi) against 90 MPa (13.1 ksi) for C15000-O61, about 5.0 times as much; tensile strength follows at 480 MPa (69.6 ksi) vs 235 MPa (34.1 ksi). In exchange, C15000-O61 is the more ductile: elongation 40% versus 10% for C15000-TH04, and C15000-TH04 is harder (130 HB vs 50 HB). C15000-TH04 runs hotter in service (450°C vs 350°C continuous). On the shop floor, C15000-TH04 machines more easily (30 vs 20 out of 100).
C15000-O61Choose it when the part is bent, formed or impact-loaded.
C15000-TH04Choose it when strength drives the design, or when the part sees heat.
C15000-O61 vs C15000-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
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 128 GPa18.6 Msi · Shear Modulus 47.5 GPa6.9 Msi · Bulk Modulus 140 GPa20.3 Msi · Poisson's Ratio 0.34 · Reduction in Area 45% · Compressive Strength 460 MPa66.7 ksi
Physical
Density and transition temperatures.
Same in both: Density 8.89 g/cm³0.32 lb/in³ · Melting Point (Solidus) 1,000°C1,832 °F · Liquidus Temperature 1,082°C1,980 °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 385 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 17.6 µm/m·K9.8 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) -0.2 V · Corrosion Resistance 55 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Formability (cold)
Same in both: Machinability Rating (AISI 1212 = 100 %) 20% · Weldability 40 / 100 · Castability 40 / 100 · Brazeability / Solderability 75 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 57 MJ/kg24,506 BTU/lb · Embodied Carbon (primary production) 3.8 kg CO₂/kg · Embodied Water 250 L/kg30 gal/lb · Typical Recycled Content 20%
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.
C15000-O61 vs C15000-TH04 — frequently asked
Is C15000-TH04 stronger than C15000-O61?
Yes. C15000-TH04 has a typical yield strength of 450 MPa (65.3 ksi) against 90 MPa (13.1 ksi) for C15000-O61 — about 5.0 times as much. Tensile strength is 480 MPa (69.6 ksi) vs 235 MPa (34.1 ksi).
Which condition does FabDigit quote by default, O61 or TH04?
TH04 is the default C15000 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, C15000-O61 or C15000-TH04?
C15000-TH04, by a small margin. Both rate poor for machinability — 30/100 against 20/100 for C15000-O61.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C15000-O61 and C15000-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.