The Densities of Austenitic Stainless Steel Castings and Weldments

Abstract

Some experiments to determine the density of austenitic stainless steel castings and weldments carried out. The results may be summarized as follows.
1. The density of an austenitic stainless steel casting appeared lower compared with that of a wrought condition. The difference in the density can be attributed to the porosity in the casting.
2. The density of an austenitic stainless steel weldment, on the other hand, appeared higher compared with that of a wrought condition. The difference may be attributable to the coarse grained structure of the specimen used in this investigation. It is obvious anyway that weldments are much dense than castings.
3. An increase in density of an austenitic stainless steel is observed, provided that the specimen is sensitized. A decreade in density appears, on the contrary, when the specimen is solution treated after sensitized.
4. The density of an 18:8 type stainless steel initially increases followed by a further decrease when the specimen is cold-worked.
5. The density of a 25:20 type stainless steel, however, decreases monotonously when the specimen is cold-worked.