Copper Alloy QBe0.4-TF00 vs QBe0.4-TM08
Copper Alloy · QBe0.4 temper comparison
QBe0.4-TF00 and QBe0.4-TM08 are two conditions of the same copper alloy grade, QBe0.4: TF00 (solution heat treated and precipitation hardened) versus TM08 (mill hardened, spring hard). The chemistry is identical, so every difference below comes from the condition. QBe0.4-TM08 is the stronger of the two: yield strength 760 MPa (110 ksi) against 550 MPa (79.8 ksi) for QBe0.4-TF00, about 38% more; tensile strength follows at 850 MPa (123 ksi) vs 690 MPa (100 ksi). In exchange, QBe0.4-TF00 is the more ductile: elongation 15% versus 8% for QBe0.4-TM08, and QBe0.4-TM08 is harder (240 HB vs 185 HB).
QBe0.4-TF00Choose it when the part is bent, formed or impact-loaded.
QBe0.4-TM08Choose it when strength drives the design.
QBe0.4-TF00 vs QBe0.4-TM08: 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 138 GPa20 Msi · 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
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 · Max Service Temperature (continuous) 200°C392 °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-TF00 vs QBe0.4-TM08 — frequently asked
Is QBe0.4-TM08 stronger than QBe0.4-TF00?
Yes. QBe0.4-TM08 has a typical yield strength of 760 MPa (110 ksi) against 550 MPa (79.8 ksi) for QBe0.4-TF00 — about 38% more. Tensile strength is 850 MPa (123 ksi) vs 690 MPa (100 ksi).
Which condition does FabDigit quote by default, TF00 or TM08?
TM04 is the default QBe0.4 condition in the FabDigit quote flow (neither TF00 nor TM08). 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-TF00 or QBe0.4-TM08?
QBe0.4-TM08, by a small margin. Both rate fair for machinability — 50/100 against 42/100 for QBe0.4-TF00.
Ready to make it?
Upload a CAD file and FabDigit prices the part in QBe0.4-TF00 and QBe0.4-TM08 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.