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Description / Abstract:
This specification2 covers both ferritic and
austenitic steel forgings for boilers, pressure vessels,
high-temperature parts, and associated equipment.
Forgings made of steel grades listed in Specification A 335, may
also be ordered under this specification. The chemical, tensile,
heat treatment, and marking requirements of Specification A 335
shall apply, except the forging shall conform to the chemical
requirements of Table I of Specification A 335 only with respect to
heat analysis. On check analysis they may deviate from these limits
to the extent permitted in Table 2 of this specification. For
"closed-in" forgings the requirements of 8.1.2 of this
specification shall apply.
Supplementary Requirements SI to S9 are provided for use when
additional testing or inspection is desired. These shall apply only
when specified individually by the purchaser in the order.
2 For ASME Boiler and Pressure Vessel Code
applications, see related Specification SA-336 in Section II of
that Code.