End-Quench Hardenability Bands — 4145 H to 4620 H
Tabulations of Band Limits
“J” Distance Sixteenths of an Inch	GRADE
	4145 H		4147 H		4150 H		4161 H		4320 H		4340 H		E 4340 H		4620 H
	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min
1	63	56	64	57	65	59	65	60	48	41	60	53	60	53	48	41
2	63	55	64	57	65	59	65	60	47	38	60	53	60	53	45	35
3	62	55	64	56	65	59	65	60	45	35	60	53	60	53	42	27
4	62	54	64	56	65	58	65	60	43	32	60	53	60	53	39	24
5	62	53	63	55	65	58	65	60	41	29	60	53	60	53	34	21
6	61	53	63	55	65	57	65	60	38	27	60	53	60	53	31	—
7	61	52	63	55	65	57	65	60	36	25	60	53	60	53	29	—
8	61	52	63	54	64	56	65	60	34	23	60	52	60	53	27	—
9	60	51	63	54	64	56	65	59	33	22	60	52	60	53	26	—
10	60	50	62	53	64	55	65	59	31	21	60	52	60	53	25	—
11	60	49	62	52	64	54	65	59	30	20	59	51	60	53	24	—
12	59	48	62	51	63	53	64	59	29	20	59	51	60	52	23	—
13	59	46	61	49	63	51	64	58	28	—	59	50	60	52	22	—
14	59	45	61	48	62	50	64	58	27	—	58	49	59	52	22	—
15	58	43	60	46	62	48	64	57	27	—	58	49	59	52	22	—
16	58	42	60	45	62	47	64	56	26	—	58	48	59	51	21	—
18	57	40	59	42	61	45	64	55	25	—	58	47	58	51	21	—
20	57	38	59	40	60	43	63	53	25	—	57	46	58	50	20	—
22	56	37	58	39	59	41	63	50	24	—	57	45	58	49	—	—
24	55	36	57	38	59	40	63	48	24	—	57	44	57	48	—	—
26	55	35	57	37	58	39	63	45	24	—	57	43	57	47	—	—
28	55	35	57	37	58	38	63	43	24	—	56	42	57	46	—	—
30	55	34	56	37	58	38	63	42	24	—	56	41	57	45	—	—
32	54	34	56	36	58	38	63	41	24	—	56	40	57	44	—	—

NOTE:

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

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