Copper Alloy QCr0.5-TD04 vs QCr0.5-TH02
Copper Alloy · QCr0.5 temper comparison
QCr0.5-TD04 and QCr0.5-TH02 are two conditions of the same copper alloy grade, QCr0.5: 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. QCr0.5-TH02 is the stronger of the two: yield strength 385 MPa (55.8 ksi) against 345 MPa (50 ksi) for QCr0.5-TD04, about 12% more; tensile strength follows at 455 MPa (66 ksi) vs 400 MPa (58 ksi). QCr0.5-TH02 is the more ductile: elongation 18% versus 12% for QCr0.5-TD04, and QCr0.5-TH02 is harder (135 HB vs 110 HB). QCr0.5-TH02 runs hotter in service (380°C vs 200°C continuous) and QCr0.5-TH02 conducts heat better (320 W/m·K vs 195 W/m·K).
QCr0.5-TH02Choose it when strength drives the design, or when the part is bent, formed or impact-loaded.
QCr0.5-TD04 vs QCr0.5-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)
Elongation at Break
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Shear Modulus 44 GPa6.4 Msi · Bulk Modulus 140 GPa20.3 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 8.89 g/cm³0.32 lb/in³ · Melting Point (Solidus) 1,070°C1,958 °F · Liquidus Temperature 1,080°C1,976 °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) -0.3 V · Corrosion Resistance 62 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Same in both: Weldability 30 / 100 · Castability 40 / 100 · Brazeability / Solderability 55 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 55 MJ/kg23,646 BTU/lb · Embodied Carbon (primary production) 3.8 kg CO₂/kg · Embodied Water 320 L/kg38.3 gal/lb · Typical Recycled Content 35%
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.
QCr0.5-TD04 vs QCr0.5-TH02 — frequently asked
Is QCr0.5-TH02 stronger than QCr0.5-TD04?
Yes. QCr0.5-TH02 has a typical yield strength of 385 MPa (55.8 ksi) against 345 MPa (50 ksi) for QCr0.5-TD04 — about 12% more. Tensile strength is 455 MPa (66 ksi) vs 400 MPa (58 ksi).
Which condition does FabDigit quote by default, TD04 or TH02?
TF00 is the default QCr0.5 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, QCr0.5-TD04 or QCr0.5-TH02?
QCr0.5-TH02, by a small margin. Both rate fair for machinability — 48/100 against 42/100 for QCr0.5-TD04.
Ready to make it?
Upload a CAD file and FabDigit prices the part in QCr0.5-TD04 and QCr0.5-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.