Malleable cast iron—its history in the United States

Abstract

The tensile stress-strain properties of inoculated cast irons with fine and relatively coarse flake graphite structures and with matrix structures of varying strengths have been determined in the temperature range 295 K to 4 K. Irons in the as-cast pearlitic and annealed ferritic condition have been considered.The modulus of elasticity of these cast irons increases slightly at low temperatures but their resistance to plastic deformation and their tensile strengths increase; a maximum tensile strength generally occurs at very low temperatures. The total strain at failure and the resilience are reduced at low temperatures in normal flake graphite irons. In irons with unusually fine flake graphite structures the total strain at failure may not decrease appreciably and at low temperatures the resilience then increases.