Lesson 1 Properties of materials All materials have properties that make them ideally suited for particular products. Design specification informs the choice of materials for a design. Metallic materials are hard, cold and they have very flat surfaces because they have been polished . Moreover they have metallic brightness . This is the classification of the properties of metals: a) Physical properties: 1. Toughness: how well the material absorbs impact.
2. Hardness: a measure of how easily a material is scratched.
3. Plastic or elastic behaviour: a measure of how much a material is deformed.
4. Ductility: the ability of a material to be worked in wire shapes.
5. Malleability: the ability of a material to be worked into panel shapes.
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