Tempering is a heat treatment that is performed on O a None

Tempering is a heat treatment that is performed on: O a None of the above Ob. Austenite Oc. Martensite O d Ferrite O e Cementite Of. Pearlite

tempering is applied to hardened steel to reduce brittleness, increase ductility ,toughness and relative stresses in MARTENSITE and PEARLITE structures.