Copper Alloy QBe0.4-TB00 vs QBe0.4-TH04
Copper Alloy · QBe0.4 temper comparison
QBe0.4-TB00 and QBe0.4-TH04 are two conditions of the same copper alloy grade, QBe0.4: TB00 (solution heat treated) versus TH04 (TD04 and precipitation hardened). The chemistry is identical, so every difference below comes from the condition. QBe0.4-TH04 is the stronger of the two: yield strength 760 MPa (110 ksi) against 200 MPa (29 ksi) for QBe0.4-TB00, about 3.8 times as much; tensile strength follows at 830 MPa (120 ksi) vs 380 MPa (55.1 ksi). In exchange, QBe0.4-TB00 is the more ductile: elongation 35% versus 6% for QBe0.4-TH04, and QBe0.4-TH04 is harder (240 HB vs 90 HB). QBe0.4-TH04 is stiffer (138 GPa vs 130 GPa) and QBe0.4-TH04 runs hotter in service (200°C vs 150°C continuous). On the shop floor, QBe0.4-TH04 machines more easily (fair vs poor) and QBe0.4-TB00 welds better (50 vs 38 out of 100).
QBe0.4-TB00Choose it when the part is bent, formed or impact-loaded, or when it will be welded.
QBe0.4-TH04Choose it when strength drives the design, or when the part sees heat.
QBe0.4-TB00 vs QBe0.4-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
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Shear Modulus 52 GPa7.5 Msi · Bulk Modulus 115 GPa16.7 Msi · Poisson's Ratio 0.3
Physical
Density and transition temperatures.
Same in both: Density 8.83 g/cm³0.32 lb/in³ · Melting Point (Solidus) 1,030°C1,886 °F · Liquidus Temperature 1,070°C1,958 °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) 17.5 µm/m·K9.7 µin/in·°F · 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) -0.25 V · Corrosion Resistance 70 / 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: Brazeability / Solderability 80 / 100 · Polishability 80 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 95 MJ/kg40,843 BTU/lb · Embodied Carbon (primary production) 6.5 kg CO₂/kg · Embodied Water 300 L/kg35.9 gal/lb · Typical Recycled Content 30%
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.
QBe0.4-TB00 vs QBe0.4-TH04 — frequently asked
Is QBe0.4-TH04 stronger than QBe0.4-TB00?
Yes. QBe0.4-TH04 has a typical yield strength of 760 MPa (110 ksi) against 200 MPa (29 ksi) for QBe0.4-TB00 — about 3.8 times as much. Tensile strength is 830 MPa (120 ksi) vs 380 MPa (55.1 ksi).
Which condition does FabDigit quote by default, TB00 or TH04?
TM04 is the default QBe0.4 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, QBe0.4-TB00 or QBe0.4-TH04?
QBe0.4-TH04. Its machinability rates fair (50/100) against poor (30/100) for QBe0.4-TB00; for welding the order is QBe0.4-TB00 first (fair, 50/100) then QBe0.4-TH04 (fair, 38/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in QBe0.4-TB00 and QBe0.4-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.