Rationale: AMS4904C results from a Five Year Review and update of this specification that includes the removal of sample size allowance for hydrogen of Table 1 (covered by ASTM E1447), requires agreement on mechanical property values for material outside specification ranges (3.5.1.2), removes the upper limit on ultrasonic quality (3.6.1), adds AS6279 (3.8), adds AMS2368 in sampling and resampling (4.3 and 4.5) and revises the report paragraph (4.4).
