Effects of Alloying Elements on the Extremely Low Carbon Cast Steel (Report 2)

Effects of alooying elements on the 0.01% C cast steel

Abstract

It was previously investigated that the 0.01% C cast steel containing 0.35% Si and 1.50% Mn gave excellent toughness and the same strength as rolled mild steel.
In this report, the effects of aluminium, nickel, chromium, molybdenum and boron additions on the mechanical properties of this extremely low carbon Mn-Si cast steel were additionally investigated.
The results were summerized as follows;
1) The addition of a suitable amount of nickel, chromium, molybdenum and boron can lower the energy transition temperature of the extremely low carbon cast steel.
2) Nickel, chromium and molybdenum can linearly increase the tensile strength of the extremely low carbon cast steel depending on their contents and chromium was more effective to increase strength.
3) The lowest transition temperature and the highest strength of the extremely low carbon cast steel were given by an addition of 0.44% nickel and their values were respectively -45°C and 50 kg/mm².