The price of Aluminum 6061 is primarily driven by its temper (e.g., T6, T4, or T651), which determines mechanical properties like tensile strength and hardness. T6 is the most common and typically serves as the price benchmark. Additionally, the form factor (plate, sheet, bar, or custom extrusion) significantly impacts the cost due to varying processing requirements. Buyers should ensure the material meets ASTM B209 or ASTM B221 standards to guarantee chemical composition (0.8-1.2% Magnesium, 0.4-0.8% Silicon) and structural integrity.