The Mechanical Properties of Stainless Steel Castings at 4 K
The limited use of stainless steel castings for 4-K service is partially due to the limited data available on their mechanical properties at 4 K.1 The most significant 4-K data available on the tensile and fracture toughness properties of stainless steel castings came from a series of CF8 centrifugal castings with varying delta-ferrite contents.1,2 There were six heats from three different vendors with delta-ferrite contents ranging from 0 to 14.5 percent. The results generally showed an increase in strength and a decrease in fracture toughness with increasing ferrite content.
KeywordsNickel Chromium Ferrite Austenite Helium
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