properties of materials Flashcards
what is a ferrous metal
metals that contain iron. they are magnetic and corrode easily if not treated. ferrous oxide or rust will occur
what is a pure metal
gained straight from ores like iron, copper, aluminium, lead and zinc
What is an alloy
Mixture of 2 or more metals
What is brass a mix of
Copper and zinc
What is bronze a mix of
Copper and tin
What is gunmetal a mix of
Copper, tin and zinc
What is steel a mix of
Iron and carbon
what is a non ferrous metal
any metal that doesn’t contain iron e.g. copper, lead, zinc and aluminium
What is thermoplastic
Polymer resin makes it. Can be heated and reshaped, but when frozen it becomes brittle. They are recyclable
What is a PVCu
Unplasticised polyvinyl chloride
What is PVCu used for
Cold water pipes
Soil pipes
Water and overflow pipes
Guttering and down pipes
What are the properties for PVCu
Not suitable for hot water
Solvent weld
Push fit
What is MDPE
Medium density polyethylene
What is MDPE used for
Underground mains (blue) CWSC
What is HDPE
High density polyethylene
What is HDPE used for
Underground mains (black)
What are the properties of HDPE
Degrades in sunlight
Fusion weld
Push fit
Compression
What is thermosetting
Rigid plastics which can cope with high temperatures but are not recyclable
Examples of thermosetting plastics are…
Formica and Bakelite
What are the properties of MDPE
Degrades in sunlight
Fusion welded
Push fit
Compression
