SIST EN 4336:2004

Overview

EN 4336:2002 (CEN) defines requirements for Steel FE-WA3801 (X4CrNiMn20-10-2) used as filler metal for welding in aerospace applications. The standard covers the supply form (wire and rod), production method, delivery condition and links essential material requirements to the broader aerospace metallic materials series. It has been prepared by the European Association of Aerospace Manufacturers (AECMA) and adopted as a European Standard to harmonize requirements across CEN member states.

Key administrative points in the standard include the obligation for national standard bodies to implement EN 4336:2002 and the expectation that manufacturers and purchasers agree qualification programmes when required.

Key Topics

• Material designation: Steel FE-WA3801 (X4CrNiMn20-10-2) is the defined filler metal grade for welding wire and rod in the aerospace series.
• Forms and production: The accepted forms are wire and rod, produced by cold drawing. The document specifies the delivery condition as cold drawn and annealed.
• Manufacturing details: The standard notes the method of melting as air melted and records the delivery condition code used in procurement and inspection.
• Inspection and conformity: EN 4336 references EN 3879 for detailed inspection topics such as external defects, residual stress, internal defects, batch uniformity (material verification), marking inspection and dimensional inspection. Product qualification is referenced to EN 2043 and must be agreed between manufacturer and purchaser.
• Standard organization: EN 4336 is part of the aerospace metallic materials family; general organization and links between EN standards are described in EN 4258. Rules for drafting are aligned with EN 4500-5.

Applications

EN 4336 is intended for stakeholders involved in aerospace welding and fabrication where consistent filler-metal performance, traceability and documented delivery conditions are required. Typical applications and benefits include:

• Supply of welding wire and rods for aircraft structural welding processes
• Ensuring traceability and batch uniformity across production lots
• Clear delivery condition and inspection requirements to support procurement contracts
• Facilitating harmonized qualification and acceptance testing between manufacturers and aerospace purchasers

The standard supports engineers, purchasing agents, quality managers and welding specialists who must ensure compliance with aerospace material practices without needing to duplicate qualification efforts.

Related Standards

• EN 3879 - Filler metal for welding: referenced for inspection, defect criteria and test methods.
• EN 2043 - Metallic materials: general requirements for semi-finished product qualification (used for product qualification references).
• EN 4258 - Organization of aerospace metallic material standards.
• EN 4500-5 - Rules for drafting and presentation of steel material standards.

For procurement and specification, follow EN 4336 alongside the referenced EN standards to ensure comprehensive coverage of material, inspection and qualification requirements for aerospace filler metals.