EN 4292:2005

Overview

EN 4292:2005 is a European standard published by CEN that specifies the requirements for forging stock of aluminium alloy AL-R39002 intended for aerospace applications. As part of the aerospace series of metallic material standards, this document defines the chemical composition, mechanical properties, dimensions, and quality control measures critical for aerospace manufacturing.

This standard supports consistent quality and performance in aerospace components by ensuring that forging stock of aluminium alloy AL-R39002 meets stringent aerospace industry demands. It is applicable to billets and bars produced through hot isostatic pressing (HIP) and mechanical alloying powder processes, making it relevant for high-performance aerospace materials.

Key Topics

• Material Designation
  The standard covers aluminium alloy AL-R39002, a dispersion-strengthened powder metallurgy alloy specifically developed for aerospace forging applications.

• Chemical Composition
  The alloy's precise limits are specified for carbon, silicon, oxygen, iron, magnesium, lithium, and aluminum content to ensure optimal strength, weight, and durability characteristics for aerospace use.

• Technical Specifications

  • Delivery conditions specify the alloy's as-fabricated state without heat treatment.
  • Forging stock is provided in form of billets and bars with defined maximum dimensions (diameter or edge ≤ 600 mm for billets and ≤ 300 mm for bars).
  • Mechanical properties include minimum proof stress (≥ 370 MPa), tensile strength (≥ 455 MPa), and elongation (≥ 3%).
  • Heat treatment is not required as the alloy’s mechanical properties are achieved through its powder metallurgy processing.

• Production and Manufacturing Methods
  The standard specifies production via hot isostatic pressing (HIP) of mechanically alloyed powders and extrusion from HIPped billets, ensuring high material integrity and uniformity.

• Quality Assurance

  • Inspect for external and internal defects following EN 2070-7 and EN 2082-2 standards.
  • Control of inclusion content and cleanliness to avoid stringer-like inclusions.
  • Density verification via displacement method (max density ≤ 2.60 kg/dm³) in accordance with test method EN 6018.
  • Dimensional and marking inspections ensure traceability and conformity.

• Normative References
  Relies on related aerospace series standards such as EN 2043, EN 2070-7, EN 2082-2, EN 4258, and EN 4500-2 for general requirements, production specifications, and drafting rules.

Applications

EN 4292:2005 is essential for aerospace manufacturers, suppliers, and engineers involved in producing high-performance aluminium forging stock. Key applications include:

• Aerospace Structural Components
  Manufacturing of critical forged parts such as airframe structural elements where combining lightweight material with excellent mechanical strength is imperative.

• Aerospace Engine Parts
  Fabrication of forged components in engines requiring superior strength-to-weight ratios and fatigue resistance.

• Powder Metallurgy Aerospace Materials
  Ensures the quality and performance consistency of powder metallurgy aluminium alloys used in aerospace forging operations.

Overall, compliance with EN 4292:2005 helps maintain the safety, reliability, and durability of aerospace products while optimizing manufacturing processes.

Related Standards

EN 4292:2005 is part of a broader aerospace materials standardization framework, closely linked to:

• EN 2043 – General requirements for semi-finished aerospace metallic products qualification.
• EN 2070-7 – Aluminium and aluminium alloy wrought products – Technical specification for wrought forging stock.
• EN 2082-2 – Aluminium alloy forging stock and forgings – Technical specification for forging stock.
• EN 4258 – General organization of aerospace metallic material standards.
• EN 4500-2 – Rules for drafting aluminium and magnesium alloy material standards.
• EN 6018 – Test methods for metallic materials – Determination of density by displacement method.

Adherence to these standards ensures harmonized quality control and material traceability across the aerospace supply chain.

By implementing EN 4292:2005, aerospace manufacturers achieve reliable sourcing and consistent quality of aluminium alloy AL-R39002 forging stock, supporting the development of lightweight, high-strength aerospace components that meet rigorous industry specifications.