Crucible Nu-Die ESR is a remelted version of H13 tool steel and offers better transverse toughness than standard H13. See also NUDIE V, Alloy Digest TS-276, October 1974, and NU-DIE XL, Alloy Digest TS-467, December 1986. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on high temperature performance. Filing Code: TS-782. Producer or source: Crucible Materials Corporation.