2077 T6 aluminum alloy is a lead-free Al-Cu-Mg-Mn-Si-Bi alloy developed especially for engineering applications where high mechanical strength and superior machining performance are required together. Its European designation is EN AW-2077 / EN AW-AlCu4.5MgMnSiBi. The T6 temper includes solution heat treatment, quenching, and subsequent artificial aging. The alloy combines high tensile and yield strength with the ability to produce short and easily controlled chips. Depending on the product dimensions, cold-drawn bars may reach minimum tensile strength values of 480 MPa and yield strength values of 400 MPa.

In terms of corrosion resistance, 2077 T6 exhibits characteristics similar to other 2xxx series aluminum alloys containing high levels of copper. Its natural corrosion resistance is lower than that of 6xxx series alloys such as 6061 and 6082. Therefore, anodizing, chemical conversion coating, painting, or other protective surface treatments are recommended for applications exposed to moisture, outdoor conditions, or chemical environments. While 6061 offers better natural corrosion resistance, 2077 provides significantly higher mechanical strength and superior high-volume machining performance.

In terms of machinability, the most important characteristic of 2077 T6 is its excellent chip-breaking performance despite its high strength. The alloy is highly suitable for CNC turning, automatic lathes, drilling, milling, and threading operations. The formation of short and fine chips facilitates chip evacuation, reduces chip accumulation around cutting tools, and helps achieve high production speeds. While 2011 alloy is known for its very high machinability, 2077 T6 combines similar high-volume production advantages with much higher mechanical strength. Compared with high-strength alloys such as 2024 and 7075, it also offers significant advantages in chip control and automatic machining efficiency.

Bending and formability properties are limited in the T6 temper. Due to its high strength and relatively low elongation, sharp bending, intensive cold forming, or deep drawing operations may create a risk of cracking. For applications requiring forming, carrying out the operation in a more ductile temper such as T4 or T4511 and then artificially aging the component may be considered. Its weldability is low; fusion welding may cause a reduction in mechanical properties within the heat-affected zone and increase the risk of cracking. Therefore, bolts, screws, nuts, rivets, or other mechanical fastening methods are generally preferred for high-strength joints.

In terms of suitability for coating and surface treatments, protective anodizing, hard anodizing, chemical conversion coating, and paint systems may be applied to 2077 T6. However, due to its high copper and bismuth content, the color and surface uniformity obtained after decorative anodizing may differ from architectural alloys such as 6060 or 6063. Therefore, preliminary testing is recommended for components where visual appearance is important. The alloy is used in applications such as valves, bolts and nuts, threaded rods, high-strength fasteners, precision CNC components, and structural machine parts. It is preferred in the automotive, precision engineering, electrical and electronics, hydraulic, and pneumatic industries where high strength and high-volume machining efficiency are required.

MATERIAL COMPOSITION STANDARDS

2077 T6 is produced in accordance with the following standards and specifications:
• 2077 T6 Cold-Drawn Round Bar; EN 573-3:2026, EN 754-1, EN 754-2:2024, EN 754-3
• 2077 T6 Cold-Drawn Square Bar; EN 573-3:2026, EN 754-1, EN 754-2:2024, EN 754-4
• 2077 T6 Cold-Drawn Flat Bar; EN 573-3:2026, EN 754-1, EN 754-2:2024, EN 754-5
• 2077 T6 Cold-Drawn Hexagonal Bar; EN 573-3:2026, EN 754-1, EN 754-2:2024, EN 754-6
• 2077 T6 Extruded Round Bar; EN 573-3:2026, EN 755-1, EN 755-2:2025, EN 755-3
• 2077 T6 Extruded Square Bar; EN 573-3:2026, EN 755-1, EN 755-2:2025, EN 755-4
• 2077 T6 Extruded Flat Bar; EN 573-3:2026, EN 755-1, EN 755-2:2025, EN 755-5
• 2077 T6 Extruded Hexagonal Bar; EN 573-3:2026, EN 755-1, EN 755-2:2025, EN 755-6
 

• Strength: Very High
• Machinability: Excellent
• Chip-Breaking Performance: Excellent
• Weldability: Low
• Formability: Low
• Corrosion Resistance: Low – Protective surface treatment is recommended
• Heat Treatment: Yes
• Lead Content: Lead-Free
   

Some Well-Known Applications of 2077 T6: 
Valves and valve bodies,
Bolts, nuts, and high-strength fasteners,
Threaded rods and precision threaded components,
CNC-turned and automatic lathe components,
Hydraulic and pneumatic system components,
High-strength structural machine parts,
Automotive, electrical-electronic, and precision engineering components.
 

​STOCK
2077 T6 aluminum is primarily supplied in cold-drawn or extruded bar and flat-bar forms. Stock availability and production options may vary depending on the product form, diameter, and cross-sectional dimensions.

• Round/ Square Bar
• Hexagonal Bar