Aluminum 7050-T74 vs 7050-T7651
Aluminum · 7050 temper comparison
7050-T74 and 7050-T7651 are two conditions of the same aluminum grade, 7050: T74 (overaged between T73 and T76) versus T7651 (T76, stress relieved by stretching). The chemistry is identical, so every difference below comes from the condition. 7050-T7651 is the stronger of the two: yield strength 490 MPa (71.1 ksi) against 441 MPa (64 ksi) for 7050-T74, about 11% more; tensile strength follows at 552 MPa (80.1 ksi) vs 510 MPa (74 ksi). 7050-T7651 is harder — 147 HB against 138 HB for 7050-T74 — which matters for wear surfaces and threads.
7050-T7651Choose it when strength drives the design, or when surface hardness matters.
7050-T74 vs 7050-T7651: 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)
Compressive Strength
Shear Strength
Fracture Toughness (K_IC)
Hardness, Brinell
Same in both: Elastic (Young's) Modulus 71.7 GPa10.4 Msi · Shear Modulus 26.9 GPa3.9 Msi · Bulk Modulus 70 GPa10.2 Msi · Poisson's Ratio 0.33 · Elongation at Break 11% · Fatigue Strength (Endurance Limit) 240 MPa34.8 ksi
Physical
Density and transition temperatures.
Same in both: Density 2.83 g/cm³0.1 lb/in³ · Melting Point (Solidus) 488°C910 °F · Liquidus Temperature 630°C1,166 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: Specific Heat Capacity 860 J/kg·K0.21 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 23.5 µm/m·K13.1 µin/in·°F · Latent Heat of Fusion 385 J/g166 BTU/lb · Max Service Temperature (continuous) 120°C248 °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.
Machinability
Formability (cold)
Same in both: Machinability Rating (AISI 1212 = 100 %) 80% · Weldability 18 / 100 · Castability 25 / 100 · Brazeability / Solderability 15 / 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) 13 kg CO₂/kg · Embodied Water 1,200 L/kg144 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.
7050-T74 vs 7050-T7651 — frequently asked
Is 7050-T7651 stronger than 7050-T74?
Yes. 7050-T7651 has a typical yield strength of 490 MPa (71.1 ksi) against 441 MPa (64 ksi) for 7050-T74 — about 11% more. Tensile strength is 552 MPa (80.1 ksi) vs 510 MPa (74 ksi).
Which condition does FabDigit quote by default, T74 or T7651?
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 7050-T74 over 7050-T7651?
Pick 7050-T7651 when strength drives the design, or when surface hardness matters.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 7050-T74 and 7050-T7651 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.