7075 mirror finish aluminum sheet
Aluminum has evolved as a versatile material in various industries, and the introduction of different alloys has expanded its usability even further. Among these, the 7075 mirror finish aluminum sheet stands out for its exceptional strength, durability, and aesthetic appeal.
7075 aluminum alloy belongs to the family of high-strength aluminum alloys and is significant for its exceptional mechanical properties. It is typically alloyed with zinc, which contributes to its high strength-to-weight ratio. The "mirror finish" indicates a highly polished surface that reflects light similar to a mirror, making it visually appealing alongside its practicality.
Features
- Superior Strength: Comparable to many steels.
- Lightweight: Commonly used where weight savings are crucial.
- Corrosion Resistance: Aluminum oxide layer resistant to moderate humidity and atmospheric exposures.
- Aesthetic Appearance: High-reflectivity surface suitable for visual applications.
Chemical Composition of 7075 Aluminum Alloy
The performance of 7075 aluminum alloy is highly influenced by its chemical composition. Below is a table indicating the ratios of various elements found in 7075:
| Element | Composition (%) |
|---|---|
| Aluminum (Al) | 90.7 - 94.7 |
| Zinc (Zn) | 5.1 - 6.1 |
| Magnesium (Mg) | 2.1 - 2.9 |
| Copper (Cu) | 1.2 - 2.0 |
| Chromium (Cr) | 0.18 - 0.28 |
| Silicon (Si) | 0.4 |
| Iron (Fe) | 0.5 |
| Titanium (Ti) | 0.2 |
| Manganese (Mn) | 0.3 |
Technical Specifications
The technical quality of 7075 mirror finish aluminum sheets allows for extensive applications. The relevant technical details adhere to strict standards largely set by the Aerospace Materials specification (AMS).
Parameters
| Property | Value |
|---|---|
| Density (g/cm³) | 2.81 |
| Melting Point (°C) | 477 |
| Yield Strength (MPa) | 570 |
| Ultimate Strength (MPa) | 620 |
| Elongation (%) | 11 |
| Hardness (Rockwell) | 150-190 HRS |
| Reflectivity (%) | 85 or more |
Implementation Standards
The implementation and quality checks for 7075 mirror finish aluminum sheets are compliant with several global standards including:
- ASTM B209 - Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate
- ASTM C634 - Specification for Aluminum-Alloy Cover Sheets Used in Insulative Butyl Deep Core Fittings
Alloy Tempering Conditions
7075 aluminum alloy is most commonly specified under T6 tempering, which results in maximum strength and reasonable workability.
| Tempering | Characteristics |
|---|---|
| T4 | Solution heat-treated, naturally aged, lower strength |
| T6 | Solution heat-treated, artificial aged, high strength |
| T73 | Solution heat-treated, extended artificially aged for improved stress corrosion resistance |
Applications of 7075 Mirror Finish Aluminum Sheet
Aerospace Industry
One major field where 7075 alloy shines extraordinarily is the aerospace sector. The high strength-to-weight ratio makes it ideal for:
- Aircraft frames
- Wing structures
- Fuels tanks
Automotive Industry
Due to its lightweight properties and infrastructural advantages, it’s increasingly used in automotive manufacturing, particularly in:
- Structural components
- Vehicle bodies to improve fuel efficiency
- Racing car elements for enhanced performance
Marine Applications
Marine applications demand authentic materials tested under rigorous conditions. 7075 offers both strength and corrosion resistance, essential for:
- Boat hulls
- Fishing poles
- High-performance motor boats
Consumer Goods
Moreover, 7075 mirror finish aluminum finds adoption in luxury consumer products where aesthetics are a key:
- Item enclosures for electronics
- Motorcycle parts with a distinctive charm
- Custom manufactured hardware elements
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