What is BS EN 3639 about?

BS EN 3639 discusses forged fasteners used in aerospace applications.

BS EN 3639 specifies the requirements for heat-resisting alloy, softened and cold-worked wires for forged fasteners that are used in aerospace applications.

Under BS EN 3639 the wires for forged fasteners are D≤ 15mm and 900 MPa ≤ Rm ≤ 1 100 MPa for aerospace applications.

Who is BS EN 3639 for?

BS EN 3639 on heat-resisting alloy is applicable to these entities:

Manufacturers of heat-resisting alloy X4NiCrMoTi43-13
Manufacturers of forged fasteners
Manufacturers of aerospace materials
Aerospace and defence industries
Testing agencies involved in the inspection of aerospace products
Certification bodies
Aerospace quality managers
Aerospace technical specialists

Why should you use BS EN 3639?

In aerospace operations, component or system failure can place the entire crew at risk so systems must operate with a high degree of strength, durability, reliability, operating environments, and complexity.

BS EN 3639 covers all the requirements for heat-resisting alloy (X6NiCrTiMoV26-15 (1.4980)), softened and cold-worked wire. It creates a standardized approach for manufacturers of heat-resisting alloy to adhere to if they supply their metallic materials for use by the aerospace and defence industry.

BS EN 3639 provides guidelines for softened and cold-worked wires for forged fasteners for heat-resisting alloys in the aerospace field.

By adopting BS EN 3639, you can demonstrate the reliability of your aerospace products, and enhance value across the supply chain, to ultimately improve the operational efficiency of the end-product application.

BS EN 3639:2021

Aerospace series. Heat resisting alloy X6NiCrTiMoV26-15 (1.4980). Softened and cold worked. Wires for forged fasteners. D ≤ 15 mm. 900 MPa ≤ Rm ≤ 1 100 MPa

Published:

31 Mar 2021

Withdrawn:

9 Dec 2025