SAE AMS 6528D:2017 pdf free

SAE AMS 6528D:2017 pdf free.Steel, Bars 0.95Cr – 0.20Mo (0.28 – 0.33C)
A cross section taken perpendicular to the surface shall be prepared, etched, and visually examined metallographically at a magnification not to exceed 100X. Optical indications of decarburization shall not show a layer of complete (ferrite) or partial decarburization exceeding the limits of Table 3.
The total depth of decarburization shall be determined by a traverse method using microindentation hardness testing in accordance with ASTM E384, at a magnification not exceeding 100X, conducted on a hardened, but untempered specimen protected during heat treatment to prevent changes in surface carbon content. Depth of decarburization is defined as the perpendicular distance from the surface to the depth under that surface where there is not further increase in hardness.Such measurements shall be far enough away from any adjacent surface to be uninfluenced by any decarburization on the adjacent surface. Acceptance shall be as listed in Table 3.
If grain refining elements (3.3.2.2) are present, the ASTM E112 grain size test (3.3.2.1) shall be conducted on a periodic basis and shall be performed at a frequency selected by the producer (not to exceed one year) unless frequency of testing is specified by purchaser. Cold finished surface hardness (3.2.1.1.1) is a periodic test and shall be performed at a frequency selected by the producer unless frequency of testing is specified by purchaser.
The producer of bars shall furnish with each shipment a report showing the producer identity, country where the metal was melted (e.g., final melt in the case of metal processed by multiple melting operations), results of tests for chemical composition, macrostructure, hardenability, and frequency-severity cleanliness rating of each heat and condition and average grain size, if measured, of each lot, and stating that the bars conform to the other technical requirements. This report shall include the purchase order number, heat and lot numbers, AMS6528D, product form, size, and quantity. If the grain size requirement of 3.3.1.2 is met by the aluminum, vanadium and/or columbium content, the aluminum, vanadium and/or columbium content shall be reported and a statement that the chemistry satisfies the grain size requirement shall be included.SAE AMS 6528D pdf free download.