EN 2632:2005

Overview

EN 2632:2005 is a CEN (Aerospace series) standard that defines requirements for aluminium alloy AL‑P7075 in the T73511 condition for extruded bars and sections with a or D ≤ 150 mm and with peripheral coarse grain control. It applies to aerospace applications and may be used to supply material in the T73510 condition if specified by the purchaser. The standard is part of the EN aerospace metallic materials series and references the technical specification EN 4400‑3.

Key topics and requirements

• Material and form: Extruded bars and sections manufactured from AL‑P7075 in the T73511 delivery/use condition; limit dimension a or D ≤ 150 mm.
• Chemical control: The standard specifies limits for major alloying elements (Si, Fe, Cu, Mn, Mg, Zn, etc.) and allows agreed additions (e.g., Zr/Ti) subject to purchaser approval.
• Heat treatment sequence: Defined solution heat treatment (typically 460–470 °C), water quench, controlled stretch (about 1–3 %), primary aging (approximately 105–125 °C for 20–30 h) and an additional stabilization age (about 172–182 °C for 5–12 h) for the T73511 use condition.
• Mechanical properties by size: Minimum proof (Rp0.2) and tensile strength (Rm) and elongation values are specified as functions of cross‑section size (e.g., Rp0.2 typically ≥400–420 MPa for small sections, decreasing with larger sections; Rm generally ≥470–485 MPa depending on size; elongation minima around 7–8 %).
• Peripheral coarse grain control: Requires verification to a specified level (Level A) to reduce coarse‑grain edge defects that can affect fatigue and fracture performance.
• Inspection and tests: References EN 4400‑3 for dimensional, internal/external defect inspections, conductivity checks, stress‑corrosion testing (e.g., exposure at σ = 75 % Rp0.2 for ≥20 days), and marking/traceability.
• Conformance: Qualification procedures and batch uniformity requirements to be agreed between manufacturer and purchaser.

Applications and who uses it

• Typical uses: Structural aerospace components manufactured from extruded AL‑P7075 sections where high strength, fatigue resistance and controlled edge microstructure are critical (frames, fittings, spars, landing gear subcomponents, etc.).
• Users: Aircraft OEMs, tier‑1 suppliers, extrusion manufacturers, metallurgists, procurement and quality engineers, inspection authorities, and certification bodies specifying or verifying material compliance.

Related standards

• EN 4400‑3 - Aerospace series: Aluminium and aluminium alloy wrought products - Technical specification, Part 3: Bar and section (referenced for testing and inspection).
• EN 4258 and EN 4500‑2 - Provide organization and drafting rules for aerospace metallic material standards.

Keywords: EN 2632, AL‑P7075, T73511, extruded bar, peripheral coarse grain control, aerospace aluminium, heat treatment, mechanical properties, EN 4400‑3.