EN 2635:2005

Overview

EN 2635:2005 is a European Standard developed by CEN that specifies requirements for the aerospace-grade aluminium alloy AL-P2014A in the T6511 heat treatment condition. This standard covers extruded bars and sections with a maximum cross-sectional dimension (a or D) of 200 mm and includes provisions for peripheral coarse grain control. The document is tailored specifically for aerospace applications, ensuring the material meets critical performance and quality criteria needed in aircraft manufacturing and related aerospace fields.

Notably, EN 2635:2005 allows for delivery in the T6510 condition if explicitly requested by the purchaser, providing flexibility in material supply based on specific application needs.

Key Topics

• Material Specifications: The aluminium alloy AL-P2014A with detailed chemical composition limits to ensure optimal strength, durability, and machinability required in aerospace parts.

• Heat Treatment Conditions: Defines the T6511 temper, involving solution heat treatment, quenching, and controlled stretching to improve mechanical properties, along with optional supply in the T6510 condition.

• Extrusion Details: Applies specifically to extruded bars and sections with cross-sectional dimension a or D ≤ 200 mm, emphasizing dimensional accuracy and uniformity.

• Peripheral Coarse Grain Control: Implements strict controls on coarse grain zones at the material periphery to enhance fatigue resistance and structural integrity, critical for aerospace safety.

• Testing and Quality Assurance: References EN 4400-3 for comprehensive testing protocols on mechanical properties, defects, dimensional inspections, and marking requirements.

• Delivery Conditions and Marking: Specifies the delivery states of the alloy, including mechanical strength values, elongation, hardness, and electrical conductivity typical to the T6511 condition, ensuring traceability and compliance.

Applications

EN 2635:2005 aluminium alloy AL-P2014A in T6511 condition is ideally suited for applications requiring:

• Structural aerospace components such as frames, supports, and reinforcements that demand high strength-to-weight ratios.
• Extruded bars and profiles used in aircraft manufacturing, ensuring tight tolerances and optimized mechanical properties.
• Fatigue-critical parts where peripheral coarse grain control reduces crack initiation and propagation.
• Replacement or specification-driven orders requiring T6510 condition material when specified by purchasers.

This standard supports manufacturers, suppliers, and engineers in aerospace industries to source consistent and certified aluminium alloy products meeting strict European aerospace material standards.

Related Standards

• EN 4400-3: Aerospace series - Aluminium and aluminium alloy wrought products - Technical specification for bar and section, detailing testing and inspection methods.
• EN 4258: General organization of aerospace metallic material standardization, providing a framework for linking various EN aerospace material standards.
• EN 4500-2: Drafting and presentation rules for aerospace metallic materials, including aluminium, aluminium alloys, and magnesium alloys.
• AECMA-STAN standards: The European Association of Aerospace Manufacturers prestandards underlying this and other aerospace material standards.

Adhering to EN 2635:2005 ensures compliance with stringent aerospace material quality requirements, facilitates international trade, and enhances safety and performance in aerospace engineering sectors.