Description / Abstract:
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 50,000 psi (345 MPa).
To apply this method, at least two coupons used for DAS
measurement and tensile testing shall be attached to the casting in
locations as defined by the cognizant engineering organization.
Areas of the casting which require DAS control must be
accessible for surface DAS measurements.
Safety-Hazardous Materials
While the materials, methods, applications, and processes
described or referenced in this specification may involve the use
of hazardous materials, this specification does not address the
hazards which may be involved in such use. It is the sole
responsibility of the user to ensure familiarity with the safe and
proper use of any hazardous materials and to take necessary
precautionary measures to ensure the health and safety of all
personnel involved.