MIL-DTL-46177 heat treated plate is made to provide a higher hardness range than the MIL-A-12560 grade within the thickness range of 0.125″ up to 0.250″. We also stock this heat treated plate product in sizes that allow it to be laser ready without the need to cut down from a larger plate or to perform additional surface cleaning. This specification is now part of MIL-DTL-12560 Rev J heat treated plate; however, we maintain product inventory to this specification for support of past vehicle platforms that require it.