Grain size

A material's grain size is important as it affects its mechanical properties. In most materials, a refined grain structure gives enhanced toughness properties and alloying elements are deliberately added during the steel-making process to assist in grain refinement.
Grain Size of single-phase metals and alloys is determined by the following methods

  • Comparison method
  • Planimetric (or Jeffries) method
  • Lineal intercept (or Heyn) method
  • Intercept open scale (Snyder and Graff) method

Grain Size Determination of metals and alloys is carried out as per IS 4748 & ASTME 112.