Explain key features, components and phases of a lead-tin thermal-equilibrium phase diagram, including the - eutectic reaction, including composition and temperature - single- and two-phase regions at different temperatures and compositions - chemical composition of the phases - hypoeutectic and hypereutectic compositions.

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Comprehend the mechanical properties of and current uses for engineering plastics, including - acrylonitrile butadiene styrene (ABS) high heat resistance, good low-temperature resistance, high impact resistance, high chemical resistance, excellent electrical insulation, good dimensional stability automobile parts, personal protective equipment (e.g. face shields, hard hats, helmets), electrical equipment (e.g. power tools housings, printers, vacuum cleaners) and high- strength applications in the construction industry - polycarbonate (PC) high transparency, good toughness, high impact strength, good chemical resistance, high heat resistance, good electrical properties, high dimensional stability lenses and shields (e.g. automotive headlamps, security windows, motorcycle face shields and windscreens, prescription lenses, safety glasses, machinery guards, skylights, and streetlamps) and electrical and electronic device housings - polyamide (PA6/nylon 6) high strength, high abrasion resistance, good thermal resistance, good chemical resistance, good electrical properties, good fatigue resistance machine parts (e.g. gears, rollers, guides, bearings, wear pads and wheels), medical implants, electrical connectors and fishing line.

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Identify and comprehend the microstructures of the steel portion of an iron–carbon equilibrium phase diagram (i.e. iron with approximately 2.1% or less carbon content), including austenite, cementite, ferrite and pearlite for eutectoid, hypoeutectoid and hypereutectoid steel.