L77 (Л77)
L77 Aluminium: Premium Alloy for Automotive & Engineering Applications
L77 aluminium is a high-strength, heat-treatable aluminium–copper–magnesium alloy, closely related to the 2L77 and 2014 series alloys, designed for aerospace, defence, and precision engineering applications. It belongs to the 2000 series of aluminium alloys, known for their superior mechanical strength and fatigue resistance, making them ideal for load-bearing and structural components subjected to high stress and vibration.
L77 derives its exceptional strength from its key alloying elements — copper (Cu), magnesium (Mg), and manganese (Mn) — which combine to produce a fine-grained, precipitation-hardened structure through proper heat treatment.
Overview of L77 Aluminium Alloy
L77 Aluminium Alloy — also known as BS L77 (2014A-T6) — is a high-strength, heat-treatable aluminium-copper alloy belonging to the 2xxx series (Al–Cu–Mg–Si) family.
It is the British Aerospace grade equivalent to AA 2014A and 2L77, primarily developed for forgings, bars, and extruded sections used in aerospace, defense, and high-performance engineering.
The L77 alloy delivers an excellent balance of strength, fatigue resistance, and machinability, making it suitable for highly stressed components where reliability and mechanical integrity are critical.
Because of its high copper content, L77 offers very high strength but moderate corrosion resistance, which can be enhanced with surface protection such as anodizing or cladding.
Characteristics for grade L77 ( L77 )
| Grade : | L77 ( L77 ) ( 1360 L77 ) |
| Classification : | Aluminium wrought alloys |
Chemical Composition of L77 Aluminium
| Element | Percentage (%) |
|---|---|
| Aluminium (Al) | Remainder |
| Copper (Cu) | 1.2% – 2.0% |
| Magnesium (Mg) | 2.1% – 2.9% |
| Zinc (Zn) | 5.1% – 6.1% |
| Iron (Fe) | Max 0.5% |
| Chromium (Cr) | 0.18% – 0.28% |
| Titanium (Ti) | Max 0.2% |
| Manganese (Mn) | Max 0.3% |
Mechanical Properties of L77 Aluminium
L77 aluminium offers a superior balance of strength, durability, and workability, making it ideal for structural and aerospace applications. Its key mechanical properties are:
| Property | Value |
|---|---|
| Tensile Strength | 572 MPa (min) |
| Yield Strength | 503 MPa (min) |
| Elongation at Break | 11% |
| Fatigue Strength | 159 MPa |
| Density | 2.81 g/cm³ |
| Melting Point | 477 – 635°C |
| Hardness (Brinell) | 150 HB |
| Shear Strength | 331 MPa |
Applications of L77 Aluminium Alloy
L77 aluminium is designed for use in demanding automotive and high-performance engineering applications. Below are some common uses:
- Automotive Industry: Chassis, suspension components, and high-load automotive parts.
- Heavy Engineering: Jigs, fixtures, and other structural components.
- Aerospace Applications: High-performance components requiring high strength and fatigue resistance.
- Heavy Machinery: Parts subjected to high wear and tear, including engine components.
Why Choose L77 Aluminium?
High Strength: Offers one of the highest tensile strengths among aluminium alloys, making it ideal for high-stress applications.
Fatigue Resistance: L77 aluminium provides excellent resistance to cyclic stresses, making it suitable for long-term reliability in demanding environments.
Lightweight: Its low density makes it a great choice for applications where weight reduction is a priority without sacrificing strength.
Machinability: Though challenging to machine, L77 can be machined effectively using appropriate techniques.
Choosing Russian Metals for L77 Aluminium
Custom Sizes & Specifications: At Russian Metals, we offer custom sizes and precision machining services for L77 aluminium to meet your specific requirements.
Reliable Delivery Across India: We provide timely and dependable delivery of L77 aluminium products across India.
Expert Guidance: Our team of experts provides technical support to help you choose the best L77 aluminium alloy for your applications.
Competitive Pricing: Contact us for the best L77 aluminium price, with bulk order discounts available.
L77 Aluminium Pricing
L77 aluminium price depends on factors such as form, quantity, and specific temper. Get in touch with Russian Metals for a personalized quote and the best price for L77 aluminium in the market.