Engineering Materials
Material used by Engineers for their Products
TypesMetalsTimberReinforced ConcreteBituminous mixturesClay productsMasonry materialsPlastics
Metals
Timber
Reinforced Concrete
Bituminous mixtures
Clay products
Masonry materials
Plastics
Principle Requirements• StrengthAdequately strong to carry the intended load
• RigidityAdequately rigid not to deform under service loads
• DurabilityTo perform function during service life
Properties of Engineering MaterialsPhysical Properties:• Shape• Brightness• Density• Absorption• Melting point• Opacity • Viscosity• Conductivity• Size or dimensions• Colour• Homogeneity
Properties of Engineering Materials
Homogeneity
IsotropicAnisotropic
Properties of Engineering Materials
Chemical Properties
Corrosion resistanceHygroscopy:PHReactivitySurface tension
Properties of Engineering Materials
Electrical Properties
1. Conductivity
2. Dielectric strength
Properties of Engineering Materials
Optical properties1. Reflectivity
2. Refractivity
3. Scattering
4. Photosensitivity
5. Luminosity
Properties of Engineering Materials
Manufacturing Properties1. Castability
2. Extruding
3. Hardness
4. Machinability
Properties of Engineering Materials
• Mechanical Properties
1. Strength
2. Stiffness
3. Elasticity
4. Ductility
5. Hardness
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