End-Quench Hardenability Bands — 8637 H to 8660 H
Tabulations of Band Limits
“J” Distance Sixteenths of an Inch	GRADE
	8637 H		8640 H		8642 H		8645 H		86B45 H		8650 H		8655 H		8660 H
	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min
1	59	52	60	53	62	55	63	56	63	56	65	59	—	60	—	60
2	58	51	60	53	62	54	63	56	63	56	65	58	—	59	—	60
3	58	50	60	52	62	53	63	55	62	55	65	57	—	59	—	60
4	57	48	59	51	61	52	63	54	62	54	64	57	—	58	—	60
5	56	45	59	49	61	50	62	52	62	54	64	56	—	57	—	60
6	55	42	58	46	60	48	61	50	61	53	63	54	—	56	—	59
7	54	39	57	42	59	45	61	48	61	52	63	53	—	55	—	58
8	53	36	55	39	58	42	60	45	60	52	62	50	—	54	—	57
9	51	34	54	36	57	39	59	41	60	51	61	47	—	52	—	55
10	49	32	52	34	55	37	58	39	60	51	60	44	65	49	—	53
11	47	31	50	32	54	34	56	37	59	50	60	41	65	46	—	50
12	46	30	49	31	52	33	55	35	59	50	59	39	64	43	—	47
13	44	29	47	30	50	32	54	34	59	49	58	37	64	41	—	45
14	43	28	45	29	49	31	52	33	59	48	58	36	63	40	—	44
15	41	27	44	28	48	30	51	32	58	46	57	35	63	39	—	43
16	40	26	42	28	46	29	49	31	58	45	56	34	62	38	65	42
18	39	25	41	26	44	28	47	30	58	42	55	33	61	37	64	40
20	37	25	39	26	42	28	45	29	58	39	53	32	60	35	64	39
22	36	24	38	25	41	27	43	28	57	37	52	31	59	34	63	38
24	36	24	38	25	40	27	42	28	57	35	50	31	58	34	62	37
26	35	24	37	24	40	26	42	27	57	34	49	30	57	33	62	36
28	35	24	37	24	39	26	41	27	57	32	47	30	56	33	61	36
30	35	23	37	24	39	26	41	27	56	32	46	29	55	32	60	35
32	35	23	37	24	39	26	41	27	56	31	45	29	53	32	60	35

NOTE:

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

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