End-Quench Hardenability Bands — 8637 H to 8660 H - METRIC
Tabulations of Band Limits
“J” Distance Millimeters	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
1.5	59	52	60	53	62	55	63	56	63	56	65	59	—	60	—	60
3	59	51	60	53	62	54	63	56	63	56	65	59	—	60	—	60
5	58	49	60	52	62	53	63	55	63	55	65	58	—	59	—	60
7	57	47	60	50	61	51	63	53	62	54	65	56	—	57	—	60
9	55	43	58	47	60	49	62	51	62	53	64	55	—	56	—	59
11	54	39	57	42	59	46	61	48	61	52	63	53	—	55	—	58
13	52	36	55	38	58	42	59	45	61	51	62	50	—	53	—	56
15	50	33	54	36	56	38	58	41	60	51	61	46	65	51	—	53
20	45	29	48	31	52	32	54	34	59	49	59	38	64	42	—	46
25	41	27	43	27	47	29	49	31	58	45	57	34	64	39	—	42
30	38	25	40	26	44	28	46	29	58	40	54	32	62	36	65	39
35	36	24	39	25	41	27	43	28	57	36	52	31	60	34	64	38
40	35	24	38	24	40	27	42	27	57	33	49	30	58	34	62	37
45	35	23	37	24	39	26	42	27	56	32	47	29	56	33	61	36
50	35	23	37	24	39	26	41	27	56	31	46	29	54	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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