scope:

This technical code applies to the design and evaluation of static and fatigue strength in base material and arc welded joints of aluminium alloys used in railway applications, which are listed in the series of standards DIN 5513 as well as DVS 1623. This technical bulletin has to be applied in designs with wall thicknesses of t ≥ 1.5 mm.

The following alloys are suggested for railway applications:

- Extruded profiles:

 EN AW-6005A, EN AW-6082, EN AW-6060, EN AW-6106

- Sheets, plates and strips:

EN AW-5083, EN AW-5454, EN AW-5754, EN AW-6082

- Aluminium casting:

EN AC 21000, EN AC 42000, EN AC 43300, EN AC 51300

- Forgings:

EN AW-5754, EN AW-5083, EN AW-6005A, EN AW-6082.

Semi-finished products made from the alloy EN AW-7020 (AIZn4.5Mg1) show an inherent risk with respect to stress corrosion cracking and to exfoliation corrosion sensitivity.

The design conditions of railway vehicles and the uncertainties due to the influences during operation require that the recommendations of the aluminium producer in reference to the manufacturing methods and to the methods of corrosion protection (e.g. anodizing, coating, painting, heat treating) are strictly followed if the alloy EN AW-7020 is used. Therefore, the use of alloy EN AW-7020 is not recommended for new designs.

If new materials or other wall thicknesses are used, it is necessary to check the applicability of the strength stipulations included in this technical code.