Material processing is part of the part of the 3-legged stool along with mechanical testing and material selection. Forging, hot working, cold working, extrusion, heat treating, cooling rates are examples of processing techniques, which in turn, affect the properties, performance, and structure of the material. Heating steel to 1750oF and cooling in air, versus quenching in water, will provide different properties depending on the composition. High carbon steels respond significantly to water quenching as demonstrated by high hardness, brittleness, increased propensity for cracking, etc.
Steel is steel. Yes, but... Strength and ductility are a function of alloy selection and processing (heat treatment, welding, aging, cooling rates, hot work, cold work, etc.)
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