7050 — Aluminium Grade Specification, Properties & Equivalents
7050 Aluminium Alloy: A High-Performance Choice for Critical Indian Applications The 7050 aluminium alloy stands as a pinnacle in high-strength aluminium alloys, primarily utilized in demanding sectors within India, including aerospace, defence manufacturing, and high-performanc
7050 Aluminium Alloy: A High-Performance Choice for Critical Indian Applications The 7050 aluminium alloy stands as a pinnacle in high-strength aluminium alloys, primarily utilized in demanding sectors within India, including aerospace, defence manufacturing, and high-performance sporting goods. Its unique combination of exceptional mechanical properties and good corrosion resistance makes the 7050 alloy indispensable for structural components that experience significant stress. In India, fabricators and engineers choose 7050 when reliability and superior performance are non-negotiable. The alloy
Chemical Composition of 7050
Alloy 7050 - Chemical Composition
| Element | 7050 (Typical Range %) | IS XXXX (Hypothetical) | ASTM B209 |
|---|---|---|---|
| Aluminium | Bal. | Bal. | Bal. |
| Zinc | 7.2 - 8.2 | 7.8 - 8.0 | 7.0 - 8.0 |
| Magnesium | 2.0 - 2.6 | 2.2 - 2.4 | 1.5 - 2.5 |
| Copper | 1.0 - 1.6 | 1.2 - 1.4 | 1.2 - 2.0 |
| Zirconium | 0.08 - 0.15 | 0.10 - 0.13 | 0.08 - 0.15 |
| Iron | Max 0.15 | Max 0.12 | Max 0.15 |
| Silicon | Max 0.12 | Max 0.10 | Max 0.12 |
| Manganese | Max 0.10 | Max 0.08 | Max 0.10 |
| Chromium | Max 0.04 | Max 0.03 | Max 0.04 |
| Titanium | Max 0.06 | Max 0.05 | Max 0.06 |
| Others (each) | Max 0.05 | Max 0.04 | Max 0.05 |
| Others (Total) | Max 0.15 | Max 0.10 | Max 0.15 |
Mechanical Properties of 7050
Alloy 7050 - Mechanical Properties (T7451 Temper)
| Property | Value | Standard Reference |
|---|---|---|
| Ultimate Tensile Strength (UTS) | 490 MPa Min | ASTM B209 |
| Yield Strength (YS) | 440 MPa Min | ASTM B209 |
| Elongation at Break | 8% Min (2-inch gauge) | ASTM B209 |
| Hardness (Brinell) | 160 HB Max | ASTM B209 |
| Density | 2.83 g/cm³ | General Engineering Data |
| Modulus of Elasticity | 71 GPa | General Engineering Data |
7050 Aluminium Alloy - Available Forms in India
| Shape | Typical Sizes | Standard Lengths |
|---|---|---|
| Plate | 3 mm to 150 mm thickness | Up to 6 meters |
| Sheet | 0.5 mm to 3 mm thickness | Up to 4 meters |
| Bar/Rods | Diameter 10 mm to 100 mm | Up to 6 meters |
| Extruded Profiles | Custom Sections | Up to 6 meters |
Note: Availability for 7050 aluminium alloy in India is predominantly in plate and sheet forms, especially for aerospace-grade specifications. Smaller quantities might require custom orders. Suppliers in major industrial hubs like Mumbai, Pune, and Bangalore typically stock common sizes.
7050 Aluminium Alloy - Real-world Applications
- Aerospace: Primary structural components, fuselage skins, wing structures, and critical airframe parts requiring high strength-to-weight ratio.
- Defence: Components for military aircraft, armour plating, and high-stress equipment for ground vehicles.
- High-Performance Sports: Frames for elite bicycles, components for racing motorcycles, and specialized sporting equipment.
- Industrial Tooling: Molds and dies for plastic injection molding where high strength and dimensional stability are crucial.
- Marine: Structural components in high-speed marine craft and specialized vessels where corrosion resistance and strength are vital.
- Pressure Vessels: Components for high-pressure systems in specialized industrial applications.
7050 Aluminium Alloy - Machinability & Weldability
The 7050 aluminium alloy, while offering excellent strength, presents moderate machining challenges. Its high zinc and copper content contribute to its hardness, necessitating the use of sharp, high-speed steel or carbide tooling. For optimal results in India’s fabrication workshops, it
7050 Aluminium Alloy - Heat Treatment & Processing
The 7050 aluminium alloy is a precipitation-hardening alloy, meaning its high strength is achieved through carefully controlled heat treatment processes. The most common tempers for 7050 are T6 and T7451, each offering distinct property profiles. The T6 temper involves solution heat treatment typically between 480-500°C, followed by rapid quenching in water. This is then followed by artificial aging at 120-140°C for substantial strength. For enhanced stress-corrosion cracking resistance, the T7451 temper for 7050 involves a slightly higher solution treatment temperature followed by a higher aging temperature (around 170-180°C to begin, with a secondary treatment). Careful control of temperatures and times is critical for achieving the desired mechanical properties and ensuring the integrity of 7050 components, especially for aerospace applications. Annealing of 7050 is done around 390-410°C followed by slow cooling for stress relief or softening, but this significantly reduces the tensile and yield strengths. Normalizing is not a standard process for 7050 alloy.
7050 Aluminium Alloy - Sourcing in India
Sourcing 7050 aluminium alloy in India, particularly in aerospace-compliant specifications, is concentrated among specialized suppliers and large manufacturers. While primary producers like Hindalco and Nalco may offer the grade, much of the readily available 7050 in India comes from importers or specialized stockists. Availability is best in major industrial centres like Mumbai, Pune, Bangalore, and Chennai, often in plate and sheet forms. Minimum Order Quantities (MOQs) for 7050 can be significant, often starting from 100-500 kgs, especially for specific tempers and sizes not commonly stocked. The price band for 7050 aluminium alloy in India typically ranges from INR 550 to INR 850 per kilogram, depending heavily on quantity, form, temper, and compliance certifications. Mill Test Certificates (MTCs) are standard and essential, often required to be as per EN 10204 3.1 or higher, detailing the precise chemistry and mechanical properties of the specific batch of 7050 alloy supplied.
7050 Aluminium Alloy - International Equivalents
| Standard | Code |
|---|---|
| ASTM | 7050 |
| IS | (No direct equivalent, refer to high-strength Al-Zn-Mg-Cu alloys) |
| EN | EN AW-7050A |
| JIS | A7050 |
| DIN | AlZn8Mg2Cu (Approximate) |
| GOST | D16 (Lower strength, refer to specific grades) |
FAQs about 7050
What is the primary use of 7050 aluminium alloy in India?
The primary use of 7050 aluminium alloy in India is in the aerospace and defence sectors. Its exceptional strength-to-weight ratio makes it ideal for critical structural components like airframes, aircraft skins, and wing structures where performance and safety are paramount. It's also found in high-performance automotive and sporting goods.
Is 7050 aluminium corrosion-resistant?
While 7050 aluminium alloy offers moderate corrosion resistance, it is generally less resistant than 5XXX or 6XXX series alloys, especially in marine environments. Its high zinc and copper content makes it susceptible to stress-corrosion cracking. However, proper surface treatments like anodizing and specific tempers (like T7451) significantly improve its corrosion performance for applications of 7050.
Where can I find 7050 aluminium suppliers in India?
You can find 7050 aluminium alloy suppliers in major industrial hubs across India, including Mumbai, Pune, Bangalore, and Chennai. Look for specialized stockists and manufacturers catering to the aerospace, defence, and high-performance sectors. MetaleMart lists verified suppliers for 7050.
What is the typical price range for 7050 aluminium in India?
The typical price range for 7050 aluminium alloy in India can vary significantly based on form, temper, quantity, and mill certifications. Generally, expect prices to be in the band of INR 550 to INR 850 per kilogram for standard forms like plates and sheets. Custom orders or smaller quantities will likely fall at the higher end of this range for 7050 grade.
What tempers are common for 7050 aluminium in India?
The most common tempers for 7050 aluminium alloy encountered in India, especially for critical applications, are T6 and T7451. Temper T6 offers high strength, while T7451 provides improved resistance to stress-corrosion cracking, making it preferred for aerospace structural components made from 7050. Always check the specific temper required for your application.
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