SIST EN 2802:2005

Overview

SIST EN 2802:2005 is a European standard published by the European Committee for Standardization (CEN) that specifies the technical requirements for aluminium alloy AL-P7475-T761 in sheet and strip form. This aerospace series standard applies to thicknesses ranging from 0.6 mm to 6 mm and is intended specifically for aerospace applications. Developed by the European Association of Aerospace Manufacturers (AECMA-STAN), the standard ensures high-performance characteristics crucial for structural aerospace components.

The standard aligns with other aerospace material standards such as EN 4258 and EN 4400-2 and covers essential aspects including chemical composition, mechanical properties, heat treatment, and testing methods.

Key Topics

• Material Designation: Aluminium alloy AL-P7475-T761, recognized for excellent strength and corrosion resistance suitable for aerospace structures.
• Thickness Range: Applicable to sheet and strip dimensions between 0.6 mm and 6 mm.
• Chemical Composition: Strict limits on alloying elements such as silicon (Si), iron (Fe), copper (Cu), manganese (Mn), magnesium (Mg), chromium (Cr), zinc (Zn), titanium (Ti), and aluminium (Al) to ensure material consistency.
• Mechanical Properties:
  • Proof stress (Rp0.2) ≥ 415 MPa
  • Tensile strength (Rm) ≥ 490 MPa
  • Elongation (A50) ≥ 9%
• Heat Treatment:
  • Delivery condition T761
  • Solution heat treatment between 460 °C and 485 °C with quenching
  • Subsequent aging at temperatures ranging from 115 °C to 178 °C for controlled durations
• Testing Requirements: Includes checks for electrical conductivity, fracture toughness, exfoliation corrosion resistance, and dimensional inspections based on referenced EN standards.
• Delivery and Manufacture: Material is supplied as rolled sheets and strips with dimensional compliance, surface finish, and homogeneity requirements.

Applications

SIST EN 2802:2005 aluminium alloy AL-P7475-T761 sheets and strips are engineered to meet the demanding requirements of the aerospace industry. Key applications include:

• Aircraft structural components such as fuselage skins, wing panels, and internal support structures.
• Aerospace assemblies where high strength-to-weight ratio and corrosion resistance are paramount.
• Aerospace manufacturing processes that require reliable material performance under variable environmental conditions.
• Engineering solutions demanding enhanced fracture toughness and mechanical resilience.

The use of AL-P7475-T761 provides aerospace engineers with materials capable of sustaining significant mechanical loads while maintaining weight efficiency, critical for modern aircraft design and safety.

Related Standards

SIST EN 2802:2005 works in conjunction with several complementary aerospace and metallic material standards, including:

• EN 4258: General organization of aerospace metallic material standards.
• EN 4400-2: Technical specification for aluminium and aluminium alloy wrought products, focusing on sheet and strip forms.
• EN 4500-2: Rules for drafting and presentation of material standards specific to aluminium and magnesium alloys.
• AECMA-STAN Series: Broader aerospace material specifications managed by the European Association of Aerospace Manufacturers (AECMA).

These related standards ensure harmonized approaches for material qualification, testing, and usage across the aerospace sector, facilitating international cooperation and compliance.

Keywords: SIST EN 2802:2005, aluminium alloy AL-P7475-T761, aerospace aluminum sheet, aerospace strip, aerospace material standards, aerospace aluminium alloy, aerospace sheet specifications, aluminium sheet thickness, aerospace corrosion resistance, aerospace mechanical properties.