the goodblock tam panel is a known defect standard that can be used for the daily system performance check in penetrant testing. the panel is a tool to establish consistent benchmarks for monitoring a penetrant system for any sudden changes.the panel is made of stainless steel that has been chrome plated on one half and surface finished on the other half to produce the desired roughness. the plated area contains five evenly spaced "starburst" crack patterns, which are progressively smaller in size from the top. the sizes of the five starbursts are tightly controlled and factory-certified to meet the tam 146040 specifications. the grit-blasted area is suitable for evaluating residual penetrant background characteristics.,the goodblock tam panel is a known defect standard that can be used for the daily system performance check in penetrant testing. the panel is a tool to establish consistent benchmarks for monitoring a penetrant system for any sudden changes.the panel is made of stainless steel that has been chrome plated on one half and surface finished on the other half to produce the desired roughness. the plated area contains five evenly spaced "starburst" crack patterns, which are progressively smaller in size from the top. the sizes of the five starbursts are tightly controlled and factory-certified to meet the tam 146040 specifications. the grit-blasted area is suitable for evaluating residual penetrant background characteristics.
