For a 1033 steel that is cooled relatively slowly to room temperature, the expected weight fraction of cementite in the as-cooled microstructure is 0.0075.What is 1033 steel?1033 steel is a medium-carbon steel with carbon as its main component. When the steel is slowly cooled to room temperature, the weight fraction of cementite in the microstructure is determined.The weight fraction of cementite in a slowly cooled 1033 steel can be found using the phase diagram for iron-carbon alloys, which shows the microstructure of an iron-carbon alloy at various compositions and temperatures. The equilibrium phase diagram for iron-carbon alloys is shown below:According to the equilibrium phase diagram for iron-carbon alloys, the weight fraction of cementite in a 1033 steel that is cooled slowly to room temperature is roughly 0.0075.