A medium-hardness steel which is rolled into plates 0.25 in. (0.6 cm) to 1.5 in. (3.8 cm) thick; used in fabricating boilers.
A medium-hardness steel which is rolled into plates 0.25 in. (0.6 cm) to 1.5 in. (3.8 cm) thick; used in fabricating boilers.