This area has the units of energy per unit volume and indicates the specific energy that the material can store elastically. Typical values for modulus of resilience are 3 in. lb. /〖in〗^3 (2.1x〖10〗^4 N.m/m^3) for annealed copper, 28(1.9x〖10〗^5) for annealed medium-carbon steel, and 385 (2.7x〖10〗^6) for spring steel