Aluminum 7150-T651 vs 7150 T77511
Aluminum · 7150 temper comparison
7150-T651 and 7150 T77511 are two conditions of the same aluminum grade, 7150: T651 (T6, stress relieved by stretching) versus T77511 (overaged extrusion, stretched and stress-relieved). The chemistry is identical, so every difference below comes from the condition. Both yield at about 572 MPa — the mechanical properties are the same, and the difference is in how the stock is processed and what it is certified to (T6, stress relieved by stretching versus overaged extrusion, stretched and stress-relieved). 7150 T77511 conducts heat better (152 W/m·K vs 130 W/m·K). For most parts the choice follows the drawing's specified condition; ask for the one your standard calls out.
7150-T651 vs 7150 T77511: 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
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Hardness, Brinell
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 · Elongation at Break 10%
Physical
Density and transition temperatures.
Same in both: Density 2.82 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 860 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 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
Formability (cold)
Same in both: Machinability Rating (AISI 1212 = 100 %) 70% · Weldability 15 / 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 1,200 L/kg144 gal/lb · Typical Recycled Content 5%
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.
7150-T651 vs 7150 T77511 — frequently asked
What is the difference between 7150-T651 and 7150 T77511?
7150-T651 and 7150 T77511 are two conditions of the same aluminum grade, 7150: T651 (T6, stress relieved by stretching) versus T77511 (overaged extrusion, stretched and stress-relieved). The chemistry is identical, so every difference below comes from the condition. Both yield at about 572 MPa — the mechanical properties are the same, and the difference is in how the stock is processed and what it is certified to (T6, stress relieved by stretching versus overaged extrusion, stretched and stress-relieved).
Which condition does FabDigit quote by default, T651 or T77511?
T651 is the default 7150 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.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 7150-T651 and 7150 T77511 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.