Aluminum 7012-T651 vs 7012-T73
Aluminum · 7012 temper comparison
7012-T651 and 7012-T73 are two conditions of the same aluminum grade, 7012: T651 (T6, stress relieved by stretching) versus T73 (solution heat treated and overaged for stress-corrosion resistance). The chemistry is identical, so every difference below comes from the condition. 7012-T651 is the stronger of the two: yield strength 495 MPa (71.8 ksi) against 420 MPa (60.9 ksi) for 7012-T73, about 18% more; tensile strength follows at 540 MPa (78.3 ksi) vs 480 MPa (69.6 ksi). In exchange, 7012-T73 is the more ductile: elongation 11% versus 9% for 7012-T651, and 7012-T651 is harder (158 HB vs 140 HB). 7012-T73 runs hotter in service (150°C vs 120°C continuous) and 7012-T73 conducts heat better (155 W/m·K vs 135 W/m·K).
7012-T651Choose it when strength drives the design.
7012-T73Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
7012-T651 vs 7012-T73: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all aluminum 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 aluminum 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
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Hardness, Brinell
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 71 GPa10.3 Msi · Shear Modulus 26.9 GPa3.9 Msi · Bulk Modulus 70 GPa10.2 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 2.81 g/cm³0.1 lb/in³ · Melting Point (Solidus) 480°C896 °F · Liquidus Temperature 635°C1,175 °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 865 J/kg·K0.21 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 23.4 µm/m·K13 µin/in·°F · Latent Heat of Fusion 385 J/g166 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Same in both: Electrical Resistivity 5.4×10⁻⁸ Ω·m2.13 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.84 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Formability (cold)
Same in both: Machinability Rating (AISI 1212 = 100 %) 90% · Weldability 22 / 100 · Brazeability / Solderability 10 / 100 · Polishability 60 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 205 MJ/kg88,134 BTU/lb · Embodied Carbon (primary production) 12.5 kg CO₂/kg · Embodied Water 1,150 L/kg138 gal/lb · Typical Recycled Content 20%
Strength versus weight
Yield strength against density for every aluminum grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
7012-T651 vs 7012-T73 — frequently asked
Is 7012-T651 stronger than 7012-T73?
Yes. 7012-T651 has a typical yield strength of 495 MPa (71.8 ksi) against 420 MPa (60.9 ksi) for 7012-T73 — about 18% more. Tensile strength is 540 MPa (78.3 ksi) vs 480 MPa (69.6 ksi).
Which condition does FabDigit quote by default, T651 or T73?
Specify the condition in the material field or the drawing note; FabDigit prices the quote for the state you call out.
Which is easier to machine, 7012-T651 or 7012-T73?
7012-T651, by a small margin. Both rate very good for machinability — 75/100 against 70/100 for 7012-T73.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 7012-T651 and 7012-T73 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.