What choose material for the manufacture of an industrial fan?
In the case of quite clean industrial air, non-corrosive, for a temperature up to 400°C, we use carbon steel. The nuance to be used (yield stress from 37 kg/mm² up to 70 kg/mm²) will depend on the mechanical stresses appearing in the impeller because of the centrifugal forces et will be calculated by the fan manufacturer.
For high temperatures, we will use stainless steel or even refractory. Several nuances of stainless steel or plastic material (PP, PVDF, polyester) will be used if the gases are corrosive. Hard steel or even steel with carbide protection or with tungsten will be recommended if the gases are loaded with abrasive dust (clinker, metallic oxides, sand…)