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Engineering MaterialsExplain the purpose of alloying in steels, naming at least four common alloying elements and summarising their main effects on mechanical properties.20257mEngineering MaterialsDefine annealing, normalising, tempering and spheroidising of steel, stating the typical heating temperature range relative to critical temperatures, holding, and cooling conditions.20257mEngineering MaterialsChoose the correct option: Carbon and Nitrogen are introduced into the surface of steel during (i) Normalizing (ii) Cyaniding (iii) Hardening (iv) Tempering20242mEngineering MaterialsSketch and label a typical isothermal transformation (TTT) diagram for eutectoid steel.20257m