Our Supra range austenitics can be readily formed by all cold forming methods. These products are mainly used in facades, claddings, storage tanks, and heat exchangers.
All grades share common forming properties such as excellent stretch formability, a high work-hardening rate as well as an average strain ratio r of approximately 1. The stability of the austenite decreases with lower alloying element content; more martensite is formed during cold working. In addition to the chemical composition, the martensite transformation depends on the forming temperature.
Due to their high toughness and work hardening behavior, austenitic steels are more difficult to machine than carbon steels but are still comparatively easy to machine compared to more highly alloyed stainless-steel grades. They require higher cutting forces than carbon steels, show resistance to chip breaking, and have a high tendency to built-up edge formation. The best machining results are obtained by using high-power equipment, sharp tooling, and a rigid set-up.
Low interstitial levels and added stabilizers have made enormous improvements to the welding characteristics of ferritic stainless steels. In addition, due to their lower thermal expansion and higher thermal conductivity, distortion and buckling is much lower during welding compared to austenitic or duplex stainless steels.