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HRC TEST BLOCK; GRID ENGRAVING - 3 MM AND 45 HRC TEST BLOCK WITH CERT ACCORDING TO ASTM E18 LATEST EDITIONS. THE STANDARDISED TEST BLOCKS SHALL HAVE A MAXIMUM NON-UNIFORMITY OF 1.0 HRC (DIFFERENCE BETWEEN THE HIGHEST AND LOWEST INDENTATION NUMBER STATED IN THE STANDARDISED TEST BLOCK CERTIFICATE). "BLOCK MEAN HARDNESS VALUE MUST BE BETWEEN 40 AND 50 HRC". VENDOR SELECTION, INITIAL EVALUATION, REEVALUATION AND MONITORING MUST BASED ON CRITERIA AS PER PRD33353 LATEST REVISION 9203151 + 9201-003 + 9201-006
