EN 4334:2002

Overview

EN 4334:2002 is a European standard that specifies the requirements for steel FE-WL1806 (15CrMnMoV5-4-9-3) used as filler metal for welding in the aerospace industry. This standard applies to filler metals supplied in the form of wire and rod, designed specifically for aerospace applications where high-quality welds and material performance are critical. Developed and approved by the European Committee for Standardization (CEN) in cooperation with the European Association of Aerospace Manufacturers (AECMA), EN 4334 ensures consistency, traceability, and performance in aerospace filler metals.

Key Topics

• Material Specification: Defines steel FE-WL1806 (15CrMnMoV5-4-9-3) chemical composition limits and mechanical properties for welding filler metals.
• Forms Covered: Filler metals in wire and rod forms produced by cold drawing, ensuring dimensional accuracy and weldability.
• Delivery Condition: Covers cold-drawn and annealed conditions which optimize the filler metal’s performance during welding.
• Heat Treatment: Specifies conditions and procedures related to heat treatment to meet aerospace quality standards.
• Quality Requirements: Includes parameters for material uniformity, residual stress, internal and external defects, dimensional inspection, and marking.
• Testing and Qualification: Details the necessity of a qualification program aligned between manufacturer and purchaser, referring to related standards for batch uniformity and defect analysis.
• Compliance and Traceability: Enforced adherence to EN 3879 for technical specifications and EN 2043 for product qualification, ensuring filler metals meet aerospace industry demands.

Applications

EN 4334 steel FE-WL1806 filler metals are critical in aerospace manufacturing and repair processes where welded joints must withstand demanding structural stresses and variable environmental conditions. Applications include:

• Aerospace Structural Components: Welding of critical load-bearing components requiring high strength and toughness.
• Aircraft Engine Manufacturing: Use in welding parts exposed to thermal and mechanical stresses.
• Repair and Maintenance: Reliable filler metals for precision welding in refurbishment or modification of aerospace equipment.
• Prototype and Series Production: Ensures reproducibility and quality in aerospace welding processes from development to production runs.

The high-grade filler metals specified in EN 4334 contribute to enhanced durability, weld integrity, and safety of aerospace structures.

Related Standards

EN 4334 forms part of a broader suite of European aerospace material standards, including:

• EN 4258 - General organization of aerospace metallic standards and their coordinated use.
• EN 3879 - Technical specifications for filler metals applicable in aerospace welding.
• EN 2043 - Requirements for semi-finished aerospace metallic products qualification.
• EN 4500-5 - Rules for drafting and presenting aerospace metallic material standards, especially steels.

These interconnected standards support comprehensive quality assurance and harmonization for aerospace materials, promoting international cooperation and product standardization.

Keywords: EN 4334, steel FE-WL1806, 15CrMnMoV5-4-9-3, aerospace filler metal, welding wire, welding rod, aerospace welding standards, European aerospace materials, filler metal quality, aerospace steel welding, aerospace manufacturing standards.