Copper Alloy QBe1.9-TD04 vs QBe1.9-TH01
Copper Alloy · QBe1.9 temper comparison
QBe1.9-TD04 and QBe1.9-TH01 are two conditions of the same copper alloy grade, QBe1.9: TD04 (solution heat treated and cold worked, full hard) versus TH01 (TD01 and precipitation hardened). The chemistry is identical, so every difference below comes from the condition. QBe1.9-TH01 is the stronger of the two: yield strength 1,120 MPa (162 ksi) against 720 MPa (104 ksi) for QBe1.9-TD04, about 56% more; tensile strength follows at 1,275 MPa (185 ksi) vs 780 MPa (113 ksi). In exchange, QBe1.9-TD04 is the more ductile: elongation 5% versus 4% for QBe1.9-TH01, and QBe1.9-TH01 is harder (370 HB vs 230 HB). QBe1.9-TH01 runs hotter in service (200°C vs 150°C continuous) and QBe1.9-TH01 conducts heat better (110 W/m·K vs 90 W/m·K).
QBe1.9-TD04Choose it when the part is bent, formed or impact-loaded.
QBe1.9-TH01Choose it when strength drives the design, or when the part sees heat.
QBe1.9-TD04 vs QBe1.9-TH01: 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
Reduction in Area
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 128 GPa18.6 Msi · Shear Modulus 50 GPa7.3 Msi · Bulk Modulus 108 GPa15.7 Msi · Poisson's Ratio 0.3
Physical
Density and transition temperatures.
Same in both: Density 8.26 g/cm³0.3 lb/in³ · Melting Point (Solidus) 865°C1,589 °F · Liquidus Temperature 980°C1,796 °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 420 J/kg·K0.1 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 17 µm/m·K9.4 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) -0.24 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 55 / 100 · Brazeability / Solderability 75 / 100 · Polishability 85 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 105 MJ/kg45,142 BTU/lb · Embodied Carbon (primary production) 7.5 kg CO₂/kg · Embodied Water 480 L/kg57.5 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.
QBe1.9-TD04 vs QBe1.9-TH01 — frequently asked
Is QBe1.9-TH01 stronger than QBe1.9-TD04?
Yes. QBe1.9-TH01 has a typical yield strength of 1,120 MPa (162 ksi) against 720 MPa (104 ksi) for QBe1.9-TD04 — about 56% more. Tensile strength is 1,275 MPa (185 ksi) vs 780 MPa (113 ksi).
Which condition does FabDigit quote by default, TD04 or TH01?
TF00 is the default QBe1.9 condition in the FabDigit quote flow (neither TD04 nor TH01). 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 welds better, QBe1.9-TD04 or QBe1.9-TH01?
QBe1.9-TD04. Its weldability rates fair (50/100) against fair (45/100) for QBe1.9-TH01.
Ready to make it?
Upload a CAD file and FabDigit prices the part in QBe1.9-TD04 and QBe1.9-TH01 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.