Rockwell Test Block, RB90 Rockwell B Scale, Serialized, with Certificate
TEST BLOCK RB90
Actual readings are given, with the averages of these readings: min. reading, max reading and a repeatability figure
Each block is serialized, with a certificate detailing the environmental conditions used to test the block
Hardness test blocks are designed to be used on one side only
Indents should be more than .010" from the centers of two indents or no closer to the block's edge than .040"
Starrett blocks can be used to test Bench Top Hardness Testers
The blocks are calibrated according to ASTM E-18 standards, ANSI (NCSL) Z540-1, (ISO) 10012-1, ISO/IEC 17025 and Mil-std 45662A.
