Mild Steel Fittings are essentially mild carbon steel fittings. There are pipe fittings made up of low cs, high carbon steels and mild carbon steels. The different fittings such as the MS Pipe Elbow can be made in the mild carbon steels materials. The ms pipe fittings range from ½ inches to 12 inches in nominal bore sizes. The different fittings such as the MS Buttweld Tee also have different schedules ranging from sch10s through 80s. There are different functional types of fittings based on their functions.