ISO 15461:2018 gives guidelines for the simplification and harmonization of the specifications for mechanical testing of open die and closed die forgings in International Standards and other technical delivery conditions for forgings of steel.
ISO 15461:2018
a) offers various options for

the frequency of testing, and
sampling conditions,

b) introduces a designation system for the options, mentioned under (a), and
c) specifies the test methods for

room temperature tensile tests,
elevated temperature tensile tests,
impact tests, and
uniformity checks by hardness tests.