Aluminum 7049-T73 vs 7049-T76
Aluminum · 7049 temper comparison
7049-T73 and 7049-T76 are two conditions of the same aluminum grade, 7049: T73 (solution heat treated and overaged for stress-corrosion resistance) versus T76 (overaged for exfoliation-corrosion resistance). The chemistry is identical, so every difference below comes from the condition. 7049-T76 is the stronger of the two: yield strength 505 MPa (73.2 ksi) against 475 MPa (68.9 ksi) for 7049-T73, about 6% more.
7049-T76Choose it when strength drives the design.
7049-T73 vs 7049-T76: 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
Reduction in Area
Compressive Strength
Shear Strength
Fracture Toughness (K_IC)
Hardness, Brinell
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 71.7 GPa10.4 Msi · Shear Modulus 26.9 GPa3.9 Msi · Bulk Modulus 71 GPa10.3 Msi · Poisson's Ratio 0.33 · Fatigue Strength (Endurance Limit) 160 MPa23.2 ksi
Physical
Density and transition temperatures.
Same in both: Density 2.84 g/cm³0.1 lb/in³ · Melting Point (Solidus) 477°C891 °F · Liquidus Temperature 635°C1,175 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: Specific Heat Capacity 960 J/kg·K0.23 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 23.4 µm/m·K13 µin/in·°F · Latent Heat of Fusion 390 J/g168 BTU/lb · Max Service Temperature (continuous) 150°C302 °F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
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.
Formability (cold)
Same in both: Machinability 72 / 100 · Machinability Rating (AISI 1212 = 100 %) 70% · Weldability 15 / 100 · Castability 20 / 100 · Brazeability / Solderability 10 / 100 · Polishability 60 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 215 MJ/kg92,433 BTU/lb · Embodied Carbon (primary production) 13.5 kg CO₂/kg · Embodied Water 1,200 L/kg144 gal/lb · Typical Recycled Content 10%
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.
7049-T73 vs 7049-T76 — frequently asked
Is 7049-T76 stronger than 7049-T73?
Yes. 7049-T76 has a typical yield strength of 505 MPa (73.2 ksi) against 475 MPa (68.9 ksi) for 7049-T73 — about 6% more. Tensile strength is 565 MPa (81.9 ksi) vs 545 MPa (79 ksi).
Which condition does FabDigit quote by default, T73 or T76?
Specify the condition in the material field or the drawing note; FabDigit prices the quote for the state you call out.
When should I choose 7049-T73 over 7049-T76?
Pick 7049-T76 when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 7049-T73 and 7049-T76 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.