Steel Bars and Forgings 0.50Cr - 0.55Ni - 0.25Mo (0.38 - 0.43C) (SAE 8740) Heat Treated, 125 ksi (862 MPa) Tensile Strength AMS6327M

DOI: https://doi.org/10.4271/AMS6327M

Issuing Committee: AMS E Carbon and Low Alloy Steels Committee

Publisher: SAE International

Pages: 9

Rationale: AMS6327M is the result of a Five-Year Review and update of the specification. The revision updates compostiion testing and reporting (see 3.1 and 3.1.2), addresses grain size requirements based on composition (see 3.1.1, 3.4.1, 4.2.1, 4.2.2, 4.4.1, and 8.4), addresses exceptions based on size (see 1.1, Table 2, 3.4.4.2, 3.7, 4.3.4, 5.2.1, and 8.7), updates the heat-treatment specification (see 3.2.2), addresses macrostructure requirements (see 3.4.2.1 and 8.8), updates decarburization test methods (see 3.4.3.3.1 and 3.4.3.3.2), updates based on changes in AMS2301 (see 4.2.1 and 4.4.4), adds note based on finish (see 8.5), and allows prior revision (see 8.6).