2L77 (2л77)
2L77 Aluminium: High-Strength Alloy for Industrial and Aerospace Applications
2L77 aluminium alloy is a high-strength, heat-treatable aluminium-copper-magnesium (Al-Cu-Mg) alloy that belongs to the 2000-series family of aerospace-grade materials. It was developed as an improved structural alloy offering a balance of mechanical performance, fatigue strength, and thermal stability, making it suitable for demanding load-bearing and precision engineering applications.
What makes 2L77 exceptional is its ability to retain strength and rigidity while maintaining relatively low density — a crucial factor in aerospace and automotive industries where weight reduction directly translates to performance and efficiency. The alloy’s copper content significantly boosts its tensile and yield strength, while magnesium enhances hardenability and resistance to deformation under stress. Manganese further refines the grain structure, contributing to consistent mechanical performance and dimensional stability during machining and heat treatment.
Overview of 2L77 Aluminium Alloy
2L77 aluminium, a member of the2xxx series, is a heat-treatable aluminium–copper alloy known for its outstanding balance of strength, toughness, and fatigue resistance. This alloy delivers exceptional mechanical performance under high-stress conditions, making it a preferred material in several precision industries.
Its high strength-to-weight ratio andexcellent machinability make it ideal for aerospace components, automotive structures, and military-grade parts. 2L77 aluminium maintains structural integrity even under prolonged stress and temperature variations, offering both durability and reliability.
- • Very high strength for a wrought aluminium alloy, suitable for demanding structural/forging applications.
- • Good machinability and ability to be formed (especially in softer tempers) before final heat‐treatment.
Characteristics for grade 2L77 ( 2L77 )
| Grade : | 2L77 ( 2L77 ) ( 1360 2L77 ) |
| Classification : | Aluminium wrought alloys |
Chemical Composition of 2L77 Aluminium Alloy
| Element | Percentage (%) |
|---|---|
| Aluminium (Al) | Balance |
| Copper (Cu) | 3.9% – 5.0% |
| Magnesium (Mg) | 0.2% – 0.8% |
| Manganese (Mn) | 0.4% – 1.2% |
| Silicon (Si) | 0.5% – 0.9% |
| Iron (Fe) | 0.5% max |
| Zinc (Zn) | 0.2% max |
| Titanium (Ti) | 0.2% max |
| Nickel (Ni) | 0.2% max |
| Chromium (Cr) | 0.1% max |
Material Properties of 2L77 Aluminium Alloy
2L77 aluminium is known for its outstanding mechanical properties, making it ideal for high-performance applications. Key characteristics include:
| Property | Value |
|---|---|
| Tensile Strength | 450 MPa (min) |
| Proof Stress | 395 MPa (min) |
| Elongation (A50 mm) | 6% (min) |
| Hardness (Brinell) | 134 HB (min) |
| Density | 2.80 g/cm³ |
| Melting Point | 640°C |
| Thermal Expansion | 22.8 ×10-6 /K |
| Modulus of Elasticity | 73 GPa |
| Thermal Conductivity | 134–155 W/m·K |
Forging and Temper Types for 2L77 Aluminium
2L77 aluminium is typically supplied inT6 temper for forging stock and extruded products. The T6 temper enhances its strength through a solution heat-treatment process, followed by artificial aging.
The alloy undergoes precipitation hardening to further improve its mechanical properties, resulting in superior hardness, durability, and stress resistance. These characteristics make it ideal for applications that demand precision and performance under pressure.
Its ability to maintain dimensional stability and strength during forging and heat treatment allows engineers to design components with tight tolerances and exceptional fatigue performance.
Current Market Rate for 2L77 Aluminium
The market rate for 2L77 aluminium varies depending on multiple factors such as material quantity, market demand, and delivery location.
At Russian Metals, we supply 2L77 aluminium in various forms — including sheet,plate, rod,bar, and forging stock — ensuring consistent quality and reliable delivery.
Prices fluctuate with global market trends, making it important to refer to recent updates for accurate valuation of aluminium alloys in industrial procurement.
Common Applications of 2L77 Aluminium
Due to its exceptional mechanical strength and fatigue resistance,2L77 aluminium is widely used in various high-performance applications, including:
- Aircraft Components: Fittings, wheels, and fuselage frames.
- Military Vehicles: Structural parts and high-strength components.
- Industrial Machinery: Tooling, fixtures, and machine frames.
- Structural Applications: Bridges, fasteners, and aerospace components.
- Forgings: For trucks, hydraulic machinery, and other industrial equipment.
Why Choose 2L77 Aluminium from Russian Metals?
Certified Quality: All our 2L77 aluminium products meet international standards for aerospace and industrial applications.
Expert Assistance: We provide expert advice on selecting the right material for your specific needs, ensuring optimal performance.
On-Time Delivery: We ensure prompt and reliable delivery across India, helping you stay on track with your project timelines.
Competitive Pricing: We offer the most competitive rates for 2L77 aluminium while maintaining premium quality.
2L77 Aluminium for Industrial and Aerospace Excellence
2L77 aluminium continues to be a go-to material for high-performance sectors such as aerospace, automotive, and military due to its exceptional strength, fatigue resistance, and machinability. For top-quality2L77 aluminium alloy at the best prices, choose Russian Metals as your trusted supplier for precision and reliability.