Material Properties — Formability (AQA GCSE Design & Technology): Revision Note
Exam code: 8552
Malleability
What is malleability?
Malleability describes how well a material can be shaped or formed by hammering, rolling or pressing
Malleable materials can be formed into thin sheets
Examples of malleable materials: gold, aluminium, copper, lead
Examples of non-malleable materials: cast iron, glass, ceramics (brittle)
Malleable applications: aluminium drink cans, gold jewellery
Ductility
What is ductility?
Ductility describes how well a material can be drawn into long wires without breaking
Ductile materials deform under tension rather than snapping
Examples of ductile materials: copper, aluminium, gold, lower carbon steels
Examples of non-ductile materials: cast iron, glass, ceramics
Ductile applications: copper wires
Elasticity
What is elasticity?
Elasticity describes how well a material can stretch and return to its original shape when the force is removed
Elastic materials do not permanently change shape when deformed
Examples of elastic materials: rubbers, silicone
Examples of non-elastic materials: ceramics, glass, timbers
Elastic applications: elastic bands, bungee cords, rubber pipe seals, sports equipment
Worked Example
A designer is choosing a material for the body of a kettle. Explain why a thermoset polymer would be a suitable choice.
[3 marks]
Answer:
A thermoset polymer has low thermal conductivity, so it would insulate the user from the heat of the boiling water inside [1 mark]. It has low fusibility, meaning it will not melt or deform at the temperatures reached by a kettle [1 mark]. It is also an electrical insulator, which would protect the user from the electrical components inside the kettle [1 mark].
Examiner Tips and Tricks
Material property questions often ask you to justify a material choice. Always name the specific property and explain why it matters for the product.
A common mistake is writing that a material is ‘strong’ without specifying the type of strength (tensile, compressive or impact). Be precise with your terminology.
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