Tensile test piece thin sheet

Test pieces were also prepared from thin sheet (see Pig. 39). 

This research was carried out upon metal which had been annealed in a bath of sodium nitrite and potassium nitrate at 450° C., and cooled in air. The reason for this initial treatment will be discussed later. 

In its annealed condition the alloy possessed the following properties — 

The variations in these properties with the amount of cold work are shown in Figs. 40 and 41. 

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