AMS5643W Steel, Corrosion-Resistant, Bars, Wire, Forgings, Mechanical Tubing, and Rings 16Cr - 4.0Ni - 0.30Cb (Nb) - 4.0Cu Solution Heat Treated, Precipitation Hardenable

AMS5643W prohibits unauthorized exceptions (3.8, 3.4.3.2.1,8.9, 8.10), revises composition (3.1) to replace obsolete chemical analysis standards, updates finish categories (3.2.1.1, 8.10), updates heat treatment specification (3.3.1), deletes requirement for CEO approval of heat treatment test (3.4.3.2), adds strain rate for tensile tests (3.4.3.2.1.1), updates requirements for product stock testing (3.4.3.2.2, 3.4.3.2.3), adds quality requirements of AS1182 (3.5.2, 8.8), changes microstructure from acceptance to periodic (4.2.1.3, 4.2.2, 4.4.1), and results from a Five-Year Review and update of this specification.