BMayer@ChabotCollege.edu ENGR-45_Lec-15_Metal_MechProp-2.ppt 15 Bruce Mayer, PE Engineering-45: Materials of Engineering Desirable Mechanical Properties  Without Considering Such Factors Cost, Weight, Weldability, etc., The Typically Desired Combination of Strength and Ductility HIGH σ y HIGH %EL  σ y, is the Mechanical DESIGN PARAMETER, not The Ultimate Strength YIELDING permanently deforms (bends) Structures; typically rendering them NON-functional
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