Aluminum 7049A-T6 vs 7049A-T73
Aluminum · 7049A temper comparison
7049A-T6 and 7049A-T73 are two conditions of the same aluminum grade, 7049A: T6 (solution heat treated and artificially aged) versus T73 (solution heat treated and overaged for stress-corrosion resistance). The chemistry is identical, so every difference below comes from the condition. 7049A-T6 is the stronger of the two: yield strength 570 MPa (82.7 ksi) against 465 MPa (67.4 ksi) for 7049A-T73, about 23% more; tensile strength follows at 640 MPa (92.8 ksi) vs 535 MPa (77.6 ksi). In exchange, 7049A-T73 is the more ductile: elongation 9% versus 7% for 7049A-T6, and 7049A-T6 is harder (150 HB vs 135 HB). 7049A-T73 runs hotter in service (150°C vs 120°C continuous).
7049A-T6Choose it when strength drives the design.
7049A-T73Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
7049A-T6 vs 7049A-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
Reduction in Area
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 27 GPa3.9 Msi · Bulk Modulus 70 GPa10.2 Msi · Poisson's Ratio 0.33 · Compressive Strength 585 MPa84.8 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
Max Service Temperature (continuous)
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 · 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.
Machinability
Same in both: Machinability Rating (AISI 1212 = 100 %) 70% · Weldability 12 / 100 · Formability (cold) 18 / 100 · Castability 25 / 100 · Brazeability / Solderability 10 / 100 · Polishability 55 / 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 1,200 L/kg144 gal/lb · Typical Recycled Content 8%
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.
7049A-T6 vs 7049A-T73 — frequently asked
Is 7049A-T6 stronger than 7049A-T73?
Yes. 7049A-T6 has a typical yield strength of 570 MPa (82.7 ksi) against 465 MPa (67.4 ksi) for 7049A-T73 — about 23% more. Tensile strength is 640 MPa (92.8 ksi) vs 535 MPa (77.6 ksi).
Which condition does FabDigit quote by default, T6 or T73?
T6 is the default 7049A condition in the FabDigit quote flow. 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.
When should I choose 7049A-T6 over 7049A-T73?
Pick 7049A-T6 when strength drives the design. Pick 7049A-T73 when the part is bent, formed or impact-loaded, or when the part sees heat.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 7049A-T6 and 7049A-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.