7075 Aluminum T6 T6511 Extrusion Bar Stock

7075 extruded aluminum bar (T6/T6511) is produced using an extrusion process, where the aluminum alloy billet is forced through a die under high temperature and pressure to achieve continuous forming. This process refines the grain structure, resulting in a dense, uniform microstructure with excellent mechanical consistency and superior dimensional stability.

The T6 temper is obtained through solution heat treatment followed by artificial aging, providing high strength, high hardness, and strong load-bearing capacity, making it suitable for high-stress structural applications. The T6511 temper is based on T6 but includes an additional stretching process to relieve internal stresses, effectively reducing residual stress and minimizing deformation risk. This results in improved machining stability and higher precision for complex components.

7075 extruded bars are widely used in aerospace structural parts, automotive load-bearing components, and high-precision engineering applications.

7075 T6 T6511 Aluminum Extrusion Bar Size

 7075 Aluminum Extrusion Process--Simplified Flow Chart

Cast Billet → Homogenization → Peeling → Gradient Heating → Hot Extrusion → Online Water Quenching → Stretch Straightening → Saw Cutting → Artificial Aging(T6/T6511) → Surface Inspection & Packaging

7075 Extrusion Bar Geometric & Form Tolerance

1. Straightness
Standard regular extruded bars have a maximum straightness of 1.5 mm per meter. For stress‑relieved 7075‑T6511 extruded bars, the straightness is controlled within 0.5 mm per meter.

2. Twist Tolerance
The strictest allowable twist is limited to 1° per meter.

3. Surface Roughness
Raw extruded surface achieves Ra 1.6~3.2 μm with faint mold flow lines, ready for direct CNC machining.

7075 Extrusion Advantages

Mechanical property strengths

7075 extruded bars own ultra-high specific strength after complete aging treatment. Its tensile strength is nearly equivalent to mild steel while the weight is only one third of steel. The material also features outstanding fatigue resistance to withstand repeated alternating loads for long-term service.

Extrusion forming merits

Thermal extrusion creates continuous fibrous grain structure inside the billet. Combined with stretch straightening for T6511 grade, residual internal stress is largely eliminated. Long-length customized bars can be produced steadily with stable overall dimensional consistency across mass batches.

Subsequent processing performance

Dense metallographic structure brings excellent machinability for CNC milling and drilling. The finished blanks are compatible with hard anodizing, passivation and other surface treatments to satisfy diverse usage requirements of aerospace and high-load mechanical components.