Outokumpu Supra range austenitics can be readily formed by all cold forming methods. All products share common forming properties including excellent stretch formability, a high work hardening rate and an average strain ratio of approximately one.
The ferritic stainless steel Supra 444/4521 can be formed using typical forming processes like folding, bending, and drawing. It has higher minimum Yield strength than a standard austenitic stainless steel like Supra 304/4301 in combination with lower work hardening behavior.
Due to their high toughness and work hardening behavior, austenitic steels are more difficult to machine than carbon steels but are still comparatively easy compared to more highly alloyed stainless steel products. 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.
Outokumpu Supra range austenitic stainless steels have excellent weldability and are suited to a full range of conventional welding methods, except oxyacetylene. For the ferritic stainless steel Supra 444/4521, conventional welding methods and filler materials applied to austenitic 300series can be used. Heat input in welding should been kept to a minimum.