Manufacturing Technology: Theory and Problems, Second Edition

CHAPTER 2

Properties of Materials

PHYSICAL PROPERTIES OF MATERIALS

• Physical properties do not involve mechanical forces. Important physical properties of a material include specific heat, density, specific gravity, thermal conductivity, melting point and electrical conductivity.

Specific heat

• The specific heat of a material is defined as the quantity of heat required to raise the temperature of a unit mass of the material through unity.
• For a material of mass m with rise in temperature Δt due to heat supplied Q, the specific heat is given as

   

  

   

• The SI unit of specific heat is Joule/Kg-K.
• There are two types of specific heats, one at constant ...