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Aluminum 7075-T6

Aluminum 7075-T6 is the benchmark high-strength aluminum alloy, delivering tensile strength comparable to many mild steels while retaining aluminum's lightweight advantage. The T6 temper maximizes strength through precise solution heat treatment and artificial aging. With its exceptional strength-to-weight ratio, 7075-T6 is the material of choice for aerospace structures, military hardware, and premium sporting goods where every gram of weight savings translates into measurable performance gains.

Mechanical Properties

Density: 2.81 g/cm³

Tensile Strength: 572 MPa

Yield Strength: 503 MPa

Elongation at Break: 11%

Shear Strength: 331 MPa

Fatigue Strength: 159 MPa

Hardness (Brinell): 150 HB

Modulus of Elasticity: 71.7 GPa

Thermal Conductivity: 130 W/m·K

Melting Point: 477–635°C

Coefficient of Thermal Expansion: 23.4 ×10⁻⁶ /°C

Electrical Conductivity: 33% IACS

Advantages

  • Highest strength among commercial aluminum alloys — tensile strength rivaling low-carbon steels at one-third the weight
  • Excellent fatigue resistance — superior endurance limit makes it ideal for cyclically loaded aerospace and automotive components
  • Good machinability — responds well to CNC machining with proper tooling and cutting parameters
  • High hardness in T6 temper — provides good wear resistance for structural and bearing surfaces

Machining & Manufacturing

ParameterSpecificationNotes
Cutting SpeedRoughing: 600–1,200 SFM (180–365 m/min)Finishing: 900–1,500 SFM (275–460 m/min)-
Feed Rate0.004–0.015 ipt (0.10–0.38 mm/rev)Lower feed rate than 6061 due to higher material hardness
ToolingSolid carbide end mills and drills; uncoated carbide for general machining, AlTiN coated tools for high-speed finishing & mass production-
CoolantWater-soluble coolant with extreme pressure additivesFlood cooling required for deep cavities and blind features to prevent work hardening
Chip ControlProduces tough and long chipsAdopt positive rake tools and chip breakers; ensure sufficient coolant; BUE easily occurs at low cutting speed
Difficulty LevelModerateHigher hardness and BUE tendency; use rigid tooling and sharp cutters to avoid work hardening

Common Applications

Aerospace: Aircraft wing spars, fuselage frames, landing gear components, and satellite structural members
Military: Weapon frames, armored vehicle components, and aircraft structural fittings requiring high strength-to-weight ratios
Automotive: Performance suspension links, racing chassis components, and high-stress drivetrain parts
Sports & Recreation: High-end bicycle frames, rock climbing hardware, archer bows, and premium firearm frames
Tooling & Molds: Mold inserts, die plates, and high-strength tooling fixtures for injection molding and die casting

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