TLS 420 MQ os a mold-quality stainless steel that meets requirements in polishability, corrosion resistance, and wear resistance by special melting and forging practices. Is is used in plastic mold cavities and surgical instruments. This datasheet provides information on composition, physical properties, hardness, and elasticity as well as fracture toughness. It also includes information on heat treating and machining. Filing Code: SS-826. Producer or source: Timken Latrobe Steel.