Armature Tube

The Armature Tube is the stainless steel tubular element used as a guide for the movable core which is actuated by the magnetic force generated by the coil. The armature tubes are normally manufactured with standard 300 series grades with low and controlled magnetic permeability values.

The below improved machinability grades are normally NOT used if a particular microcleanliness is required.

Depending on the welding process, Maxival® improved machinability grades have a different behaviour compared to standard grades. This characteristic must be considered during the design and material specification stage.

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Valbruna Grade Steel type W.N. AISI UNS EN BS
MVAISL Austenitic Stainless Steel 1.4301/1.4307 304/304L S30400/S30403 X5CrNi18-10/X2CrNi18-9 304S15/304S31
MVAPML Austenitic Stainless Steel 1.4401/1.4404 316/316L S31600/S31603 X2CrNiMo17-12-2/X5CrNiMo17-12-2 316S14/316S19
VPAU188Z Austenitic Stainless Steel 1.4305 303 S30300 X8CrNiS18-9 303S31