Copper Alloy QCr0.5-TB00 vs QCr0.5-TH04
Copper Alloy · QCr0.5 temper comparison
QCr0.5-TB00 and QCr0.5-TH04 are two conditions of the same copper alloy grade, QCr0.5: TB00 (solution heat treated) versus TH04 (TD04 and precipitation hardened). The chemistry is identical, so every difference below comes from the condition. QCr0.5-TH04 is the stronger of the two: yield strength 440 MPa (63.8 ksi) against 90 MPa (13.1 ksi) for QCr0.5-TB00, about 4.9 times as much; tensile strength follows at 495 MPa (71.8 ksi) vs 235 MPa (34.1 ksi). In exchange, QCr0.5-TB00 is the more ductile: elongation 42% versus 14% for QCr0.5-TH04, and QCr0.5-TH04 is harder (150 HB vs 50 HB). QCr0.5-TH04 runs hotter in service (350°C vs 250°C continuous) and QCr0.5-TH04 conducts heat better (315 W/m·K vs 185 W/m·K). On the shop floor, QCr0.5-TH04 machines more easily (fair vs poor) and QCr0.5-TB00 welds better (fair vs poor).
QCr0.5-TB00Choose it when the part is bent, formed or impact-loaded, or when it will be welded.
QCr0.5-TH04Choose it when strength drives the design, or when the part sees heat.
QCr0.5-TB00 vs QCr0.5-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
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 %)
Weldability
Formability (cold)
Same in both: 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-TB00 vs QCr0.5-TH04 — frequently asked
Is QCr0.5-TH04 stronger than QCr0.5-TB00?
Yes. QCr0.5-TH04 has a typical yield strength of 440 MPa (63.8 ksi) against 90 MPa (13.1 ksi) for QCr0.5-TB00 — about 4.9 times as much. Tensile strength is 495 MPa (71.8 ksi) vs 235 MPa (34.1 ksi).
Which condition does FabDigit quote by default, TB00 or TH04?
TF00 is the default QCr0.5 condition in the FabDigit quote flow (neither TB00 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, QCr0.5-TB00 or QCr0.5-TH04?
QCr0.5-TH04. Its machinability rates fair (50/100) against poor (30/100) for QCr0.5-TB00; for welding the order is QCr0.5-TB00 first (fair, 40/100) then QCr0.5-TH04 (poor, 30/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in QCr0.5-TB00 and QCr0.5-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.