A housing is a housing formed of austenitized ferritic stainless steel including a base formed of a ferrite phase and a surfacing layer formed of an austenitized phase in which the ferrite phase is austenitized, the housing including a first surface exposed to an external space of the housing, and a second surface adjacent to the first surface with a corner portion interposed therebetween, and exposed to the external space, wherein an angle of an internal angle formed by the first surface and the second surface at the corner portion is greater than 0°, and less than 180°, and a surfacing layer at the corner portion is thicker in thickness than a surfacing layer in the first surface and a surfacing layer in the second surface.