1.1 This test method covers the determination of heat stability of steam turbine shafts and rotor forgings to ensure stability at operating temperature. This test method is not ordinarily applicable to generator rotor forgings.

1.2 The values stated in inch-pound units are to be regarded as the standard.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.