Dendrite Arm Spacing of Structural Aircraft Quality D357 Aluminum Alloy Castings, Determination and Acceptance of
ARP1947D
This document covers the recommended practice for determining the acceptability of the dendrite arm spacing (DAS) of D357-T6 aluminum alloy castings required to have tensile strength not lower than 50 ksi (345 MPa).
Rationale:
ARP1947D results from an SAE Five-Year Review and update of this specification with changes to relocate Definitions (see 2.3), correct typographical errors (see Title and 2.3.2) and strength units consistent with related material specifications (see 1.1 and 4.1.1), and update Applicable Documents (see Section 2).
Related Topics:
Aluminum alloys
Casting alloys
Aircraft
Also known as: SAE ARP 1947
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