The excellent formability of Sanicro 28 permits cold bending to very small bending radii. Annealing is not normally necessary after cold bending.
For operating temperatures over 400°C (800°F), heat treatment should be carried out after bending to ensure good ductility after prolonged service times.
Sanicro 28 is expanded into tube sheets in the same way as standard austenitic stainless steels.
The machining of Sanicro 28, as with other stainless steels, requires an adjustment of tooling data and machining method, in order to achieve satisfactory results. Compared to Sanmac 316/316L, the cutting speed must be reduced by approximately 50-55% when turning Sanicro 28 with coated, cemented carbide tools. Much the same applies to other operations. Feeds should only be reduced slightly and with care.
Detailed recommendations for the choice of tools and cutting data are provided in the brochure S-02909-ENG. Data should be selected as for steel grade Sanmac 316/316L, while taking into account the provisions above.