Rockwell Hardness Test Blocks

	Hardness Scale Hardness Scale

	Hardness Hardness

	Width Width

	Height Height

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

4 Products

Make sure your hardness testers are accurately calibrated. Blocks are marked with their corresponding Rockwell hardness and a serial number.

All blocks come with a calibration certificate traceable to NIST that states they've passed a test for accuracy.

Hardness Scale	Accuracy	Ht.	Wd.	Dp.	Specifications Met	Choose a Hardness		Each
A	±5	1 1/2"	2 1/2"	1/4"	ASTM E18	Rockwell A30, Rockwell A40, Rockwell A50, Rockwell A54, Rockwel A55, Rockwell A60, Rockwell A61, Rockwell A70, Rockwell A80	00000000	000000
B	±5	2"	2"	1/4"	ASTM E18	Rockwell B30, Rockwell B40, Rockwell B50, Rockwell B60, Rockwell B65, Rockwell B70, Rockwell B75, Rockwell B80, Rockwell B85, Rockwell B90, Rockwell B100	00000000	00000
C	±5	1 1/2"	2 1/2"	1/4"	ASTM E18	Rockwell C20, Rockwell C25, Rockwell C30, Rockwell C33, Rockwell C35, Rockwell C36, Rockwell C40, Rockwell C44, Rockwell C45, Rockwell C50, Rockwell C55, Rockwell C58, Rockwell C60, Rockwell C62, Rockwell C63	00000000	00000
E	±5	2"	2"	1/4"	ASTM E18	Rockwell E75, Rockwell E80, Rockwell E85, Rockwell E90, Rockwell E100	00000000	00000