Fatigue fractures are progressive beginning as minute cracks and grow under the action of fluctuating stress. These alloys are the chromium stainless steels containing low carbon levels. They are hardenable primarily by cold working, although some will harden slightly by heat treating. Ferritic stainless steels work harden much slower than austentitic stainless steels. An alloy of iron with a sufficient amount of some element or elements such as manganese, chromium or vanadium for use as a means in adding these elements into molten steel.
Ferrous alloys are, therefore, iron base alloys.
This is the usual and accepted method of dressing the edges of annealed spring steel strip after slitting in cases where edgewise slitting cracks are objectionable or slitting burr is to be removed. The surface appearance of the various metals after final treatment such as rolling, etc. Over the years the following finishes have become recognized as standard in their respective fields. Bright one side. Bright finish - a luster finish produced by use of rolls having a moderately smooth surface.