Reference blocks Brinell ≥ 250 kg

Scale	F/D²	Nominal reference block values
HBW 10/3000	30	70	100	150	170	200	250	300	350	400	450	500	550	600	650
HBW 10/1500	15	70	100	150	170	200	250	300	350	400	450	500	550	600	650
HBW 10/1000	10	70	100	150	170	200	250	300	350	400	450	500	550	600	650
HBW 10/500	5	70	100	150	170	200	250	300	350	400	450	500	550	600	650
HBW 10/250	2,5	70	100	150	170	200	250	300	350	400	450	500	550	600	650
HBW 5/750	30	70	100	150	170	200	250	300	350	400	450	500	550	600	650
HBW 5/250	10	70	100	150	170	200	250	300	350	400	450	500	550	600	650

All nominal reference block values highlighted and in italics, eg.

300

are outside the ranges specified in EN ISO 6506-3 and ASTM E10. UKAS Certificates can still be supplied with these reference blocks, but the certificate will state that the reference block is outside the permitted range.