This specification, in conjunction with the general requirements for steel heat treatment covered in AMS 2759, establishes the requirements for heat treatment of martensitic corrosion-resistant steel parts. Parts are defined in AMS 2759.
This specification is applicable to parts made from the following steels: Types 403, 410, 416, 420, 422, 431, 440C, and Greek Ascoloy (UNS S40300, S41000, S41600, S42000, S42200, S43100, S44004, and S41800 respectively).
add a foot note to table 2 for 440C to allow a maximum set point of 1975F, restricted to parts of a section thickness of 0.25” or less. Resolution at AMEC meeting 204