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