استاندارد آلیاژهای در معرض خوردگی شدید ASTM A744

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Standard Specification for
Castings, Iron-Chromium-Nickel, Corrosion Resistant, for
Severe Service1

این استاندارد

 Scope
This specification covers iron-chromium-nickel alloy,
stainless steel castings intended for particularly severe corrosive
applications.
This specification requires postweld heat-treatment of
all weld repairs affecting surfaces intended to be wetted by the
corrosive medium. For applications for which postweld heattreatment
is not considered mandatory for retention of acceptable
corrosion resistance, refer to SpecificationA 743/A 743M.
NOTE 1—For general corrosion-resistant alloy castings, reference
should be made to Specification A 743/A 743M. For general heat-resistant
alloy castings, reference should be made to Specification A 297/A 297M.
For nickel-base alloy castings, refer to Specification A 494/A 494M.
The values stated in either inch-pound units or SI units
are to be regarded separately as standard. Within the text, the
SI units are shown in brackets. The values stated in each
system are not exact equivalents; therefore, each system must
be used independently of the other. Combining values from the
two systems may result in nonconformance with the specification.
Inch-pound units are applicable for material ordered to
Specification A 744 and SI units for material ordered to
Specification A 744M.

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