ABSTRACT
During the 1970s and into the 1980s, much attention was focused on a family
of stainless alloys that came to be identified as superaustenitic. The
foundation for the development of this class of materials was in the
development of Carpenter No. 20 stainless, introduced in 1951. Consisting of
28% nickel and 19% chromium with additions of molybdenum and copper,
this alloy was first produced as a cast material. Development of the process
to produce this material as a wrought product and later refinements in
chemistry ultimately resulted in the introduction of 20Cb-3 stainless in 1965.
Superaustenitic materials are tabulated in Table 11.1.
