End-Quench Hardenability Bands — 4626 H to 50B44 H
Tabulations of Band Limits
“J” Distance Sixteenths of an Inch	GRADE
	4626 H*		4718 H		4720 H		4815 H		4817 H		4820 H		50B40 H		50B44 H
	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min
1	51	45	47	40	48	41	45	38	46	39	48	41	60	53	63	56
2	48	36	47	40	47	39	44	37	46	38	48	40	60	53	63	56
3	41	29	45	38	43	31	44	34	45	35	47	39	59	52	62	55
4	33	24	43	33	39	27	42	30	44	32	46	38	59	51	62	55
5	29	21	40	29	35	23	41	27	42	29	45	34	58	50	61	54
6	27	—	37	27	32	21	39	24	41	27	43	31	58	48	61	52
7	25	—	35	25	29	—	37	22	39	25	42	29	57	44	60	48
8	24	—	33	24	28	—	35	21	37	23	40	27	57	39	60	43
9	23	—	32	23	27	—	33	20	35	22	39	26	56	34	59	38
10	22	—	31	22	26	—	31	—	33	21	37	25	55	31	58	34
11	22	—	30	22	25	—	30	—	32	20	36	24	53	29	57	31
12	21	—	29	21	24	—	29	—	31	20	35	23	51	28	56	30
13	21	—	29	21	24	—	28	—	30	—	34	22	49	27	54	29
14	20	—	28	21	23	—	28	—	29	—	33	22	47	26	52	29
15	—	—	27	20	23	—	27	—	28	—	32	21	44	25	50	28
16	—	—	27	20	22	—	27	—	28	—	31	21	41	25	48	27
18	—	—	27	—	21	—	26	—	27	—	29	20	38	23	44	26
20	—	—	26	—	21	—	25	—	26	—	28	20	36	21	40	24
22	—	—	26	—	21	—	24	—	25	—	28	—	35	—	38	23
24	—	—	25	—	20	—	24	—	25	—	27	—	34	—	37	21
26	—	—	25	—	—	—	24	—	25	—	27	—	33	—	36	20
28	—	—	24	—	—	—	23	—	25	—	26	—	32	—	35	—
30	—	—	24	—	—	—	23	—	24	—	26	—	30	—	34	—
32	—	—	24	—	—	—	23	—	24	—	25	—	29	—	33	—

NOTE: These values were adjusted to the nearest Rockwell “C” point, and are used when points are selected and specified. * Formerly Standard Steel

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