End-Quench Hardenability Bands — 8720 H to 94B30 H - METRIC
Tabulations of Band Limits
“J” Distance Millimeters	GRADE
	8720 H		8740 H		8822 H		9260 H		9310 H		94B15 H		94B17 H		94B30 H
	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min
1.5	48	41	60	53	50	43	—	60	43	36	45	38	46	39	56	49
3	47	39	60	52	49	42	—	60	43	35	45	38	46	39	56	49
5	45	35	60	51	47	38	65	58	43	34	45	37	46	38	56	48
7	41	29	60	49	45	31	63	50	43	33	44	34	45	36	55	47
9	37	25	59	46	41	28	62	42	43	31	42	30	44	31	55	46
11	33	22	58	43	38	26	60	38	42	30	40	26	43	26	54	44
13	31	21	56	39	35	24	58	36	41	28	38	22	41	24	53	41
15	29	—	54	36	33	23	54	35	40	27	36	20	39	22	53	38
20	27	—	50	31	31	21	47	33	38	26	31	—	34	—	51	31
25	25	—	45	29	29	20	40	32	36	25	28	—	30	—	47	26
30	24	—	43	28	29	—	38	31	35	25	26	—	28	—	43	24
35	23	—	41	27	28	—	37	30	35	25	24	—	26	—	40	23
40	23	—	40	27	27	—	36	29	34	25	23	—	25	—	37	22
45	23	—	39	26	27	—	35	28	34	24	22	—	24	—	36	21
50	22	—	38	26	27	—	35	28	33	24	22	—	23	—	34	20

NOTE:

These values were adjusted to the nearest Rockwell “C” point, and are used when points are selected and specified.

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