The materials listed below are equivalent to the material described in this specification and may be used interchangeably provided that the technical requirements of this specification are met.
11.2. This table is not an exhaustive list of equivalent materials; other equivalent materials may be used provided that the proposal is acceptable to a competent person within the Materials Engineering Group and that the technical requirements of this specification are met. Such alternatives shall be explicitly documented as per the requirements in paragraphs 1.4 and 10.2 of this specification.