MTD 2 is mold base quality, Mn-Cr-Mo plate steel. It is commonly used in holder blocks, clamping plates, and support plates. ArcelorMittal USA MTD steels comprise a family of pre-hardened alloy plate steels developed for a variety of mold, tool, and die applications. This datasheet provides information on composition. It also includes information on forming, machining, and joining. Filing Code: SA-794. Producer or source: ArcelorMIttal USA, Plate.