Dimensional Check: CMM inspection of cavity/core dimensions, critical to +/-0.01mm tolerance. Report includes form, position, and profile tolerances per ASME Y14.5.
Surface Finish: Visually compare to SPI surface finish standards (A-1 mirror to D-3 rough). Ra measurement with profilometer. SPI A-1 (mirror finish, Ra 0.012-0.025μm) typically costs 30-50% more to produce than SPI C-1 (EDM surface, Ra 1.6-3.2μm).
Hardness Test: Rockwell C scale for tool steel. Verify at 3-5 locations on cavity and core. Report shows HRC values and heat treatment batch number.
Steel Certificate: Mill certificate matching the steel grade ordered. Verify composition (C, Cr, Mo, V percentages).