Aluminum 7050-T7451

Aluminum 7050-T7451 is a high-strength aerospace alloy developed specifically to overcome the limitations of 7075 in thick sections. While 7075 is strong, it becomes susceptible to stress-corrosion cracking and loses toughness in plates thicker than 3 inches. 7050-T7451 solves this. It retains high strength, excellent fracture toughness, and superior stress-corrosion resistance even in very thick billets. At Jucheng Precision, we specialize in "hogging out" (heavy material removal) large 7050 blocks to create unitary aerospace structures (bulkheads, wing spars) that are lighter and stronger than assembled parts.

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Aluminum 7050-T7451

7050-T7451 Machining Capabilities

Capability Technical Description Jucheng Advantage
Thick Section Machining 7050 maintains its strength even in very thick sections (>150mm), unlike 7075. We machine deep pockets from solid billets. Our rigid gantry mills can remove massive amounts of material from thick 7050 blocks while maintaining dimensional stability.
High Fracture Toughness Machining critical safety parts that require resistance to crack propagation. We use specialized cutting parameters to avoid inducing surface stress, ensuring the part’s fatigue life is not compromised.
Deep Pocketing Milling deep, thin-walled ribs in structural bulkheads. Advanced chip evacuation strategies prevent chip re-cutting, ensuring a smooth finish at the bottom of deep pockets.
Stress-Relieved (T7451) The T7451 temper is over-aged and stretched to minimize internal stress. Resulting parts have minimal distortion after machining, essential for large precision aerospace frames.

Fabrication Guidelines for 7050 Aluminum

7075 Replacement:
7050 is often chosen over 7075 for thick plates (over 3 inches) because 7075 loses strength in the center of thick sections, whereas 7050 retains it. Tip: Specify 7050 for heavy-duty structural blocks.

Corrosion Resistance:
7050-T7451 offers significantly better Stress Corrosion Cracking (SCC) resistance than 7075-T6. Tip: Ideal for parts under constant tensile stress in corrosive environments.

Weldability:
Like 7075, 7050 is not weldable. It relies on its high material strength and machining from solid blocks to create complex unitary structures.

Primary Applications

Commercial Aviation
Fuselage frames, wing skins, and bulkheads requiring high strength and fracture toughness.

Military Aircraft
Heavy-duty structural components for fighter jets where performance under extreme load is critical.

Aerospace Fittings
Thick attachment fittings and landing gear components that must resist stress corrosion.

Heavy Structural Blocks
Any application requiring a large, solid chunk of high-strength aluminum.

Properties

Density 2.83 g/cm³
Tensile Strength 510 - 524 MPa
Yield Strength 455 MPa
Hardness 140 HB (Brinell)
Elongation at Break 11%
Fracture Toughness Superior
SCC Resistance Excellent
Thermal Conductivity 154 W/m-K
Electrical Conductivity 40% IACS
Machinability Rating Good
Weldability Poor
Max Part Size 2000 x 800 x 600 mm