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2nd Semester
BT-203
Unit 1 Notes

BT-203 Basic Mechanical Engineering Unit 1 Notes

Notes and important questions for unit 1: Unit I: Materials.

Unit 1 · Short notes Unit I: Materials Classification of engineering material · Composition of cast iron and carbon steels and the iron‑carbon diagram · Alloy steels and their applications · Mechanical properties: strength, hardness, toughness, ductility, brittleness, malleability · Tensile test – stress‑strain diagram of ductile and brittle materials · Hooke’s law and modulus of elasticity

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