SIST EN 2512:2015

Overview

EN 2512:2014 is a CEN European Standard for aerospace-grade aluminium plate: Aluminium alloy AL‑P7175 in temper T7351, in rolled plate form with thickness range 6 mm < a ≤ 100 mm. It defines material designation, chemical composition, production form, delivery condition (T7351), mechanical and physical property requirements, and the tests and qualification rules needed for aerospace applications.

Key topics and technical requirements

• Material and form
  • Alloy: AL‑P7175 (composition limits for Si, Fe, Cu, Mn, Mg, Cr, Zn, Ti and others are specified).
  • Form: rolled plate, thickness >6 mm up to 100 mm; typically supplied unclad.
• Delivery condition
  • T7351 temper with a specified multi-step heat‑treatment sequence including solution heat treatment, water quench, controlled stretch, intermediate and final artificial ageing. (Standard gives temperature and time ranges: e.g. solution 460–480 °C; quench to ≤40 °C; controlled stretch 1.5–3 %; final ageing 155–175 °C for 8–30 h; an alternative single‑stage ageing option is also permitted.)
• Mechanical properties
  • Proof stress (Rp0.2), tensile strength (Rm) and elongation (A) minima are defined by thickness band and test direction (L, LT, ST). Typical ranges in the standard: Rp0.2 ≈ 330–395 MPa, Rm ≈ 410–480 MPa, A ≈ 4–7 % depending on thickness and orientation.
• Physical and durability criteria
  • Electrical conductivity limits (γ) and acceptability rules.
  • Stress corrosion and fracture toughness requirements for product qualification; fracture toughness K1C requirements apply for thicker plates (dimensions 25 < a ≤ 100 mm: K1C ≥ 25 MPa·m^0.5).
• Testing and inspection
  • References to specific test-piece selection, external/internal defect limits, batch uniformity, marking and dimensional inspection procedures.

Applications and users

• Targeted at the aerospace industry for structural and airframe components where high‑strength 7xxx aluminium plate is required.
• Primary users:
  • Material engineers and specifiers selecting plate for aircraft structures
  • Procurement and quality assurance teams verifying supplier compliance
  • Manufacturers, fabricators and certification bodies involved in aerospace component production and qualification
• Typical applications: primary structural parts, high‑load fittings and components where a combination of high strength, fracture toughness and corrosion performance is required.

Related standards

• EN 2131 - Plates in aluminium alloys (dimensions)
• EN 4258 - Organization of aerospace metallic material standards
• EN 4400‑1 - Technical specification for aluminium wrought products (plate)
• EN 4500‑2 - Rules for drafting/presentation of aluminium material standards

Keywords: EN 2512:2014, AL‑P7175, T7351, aluminium alloy plate, aerospace aluminium, rolled plate, mechanical properties, fracture toughness, stress corrosion, CEN.