The document specifies the Rockwell test Bm and Fm in case of thin test pieces, if using the Rockwell test B and F of EN 10109-1 shows appearance of deformation on the back of the test piece.#,,#
DIN 50103-3:1995 history
2017DIN 50103-3:2017-05 Testing of metallic materials - Rockwell hardness test - Part 3: Modified Rockwell scales Bm and Fm for thin steel sheet
2017DIN 50103-3:2017 Testing of metallic materials - Rockwell hardness test - Part 3: Modified Rockwell scales Bm and Fm for thin steel sheet
1995DIN 50103-3:1995 Testing of metallic materials - Rockwell hardness test - Part 3: Modified Rockwell scales Bm and Fm for thin steel sheet