End-Quench Hardenability Bands — 1038 H to 15B21 H
Tabulations of Band Limits
“J” Distance Sixteenths of an Inch	GRADE
	1038 H		1045 H		1522 H		1524 H		1526 H		1541 H		15B21 H
	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min
1	58	51	62	55	50	41	51	42	53	44	60	53	48	41
1.5	56	42	61	52	48	41	49	42	50	42	59	52	48	41
2	55	34	59	42	47	32	48	38	49	38	59	50	47	40
2.5	53	29	56	34	46	27	47	34	47	33	58	47	47	39
3	49	26	52	31	45	22	45	29	46	26	57	44	46	38
3.5	43	24	46	29	42	21	43	25	42	25	56	41	45	36
4	37	23	38	28	39	20	39	22	39	21	55	38	44	30
4.5	33	22	34	27	37	—	38	20	37	20	53	35	42	23
5	30	22	33	26	34	—	35	—	33	—	52	32	40	20
5.5	29	21	32	26	32	—	34	—	31	—	50	29	38	—
6	28	21	32	25	30	—	32	—	30	—	48	27	32	—
6.5	27	20	31	25	28	—	30	—	28	—	46	26	27	—
7	27	—	31	25	27	—	29	—	27	—	44	25	22	—
7.5	26	—	30	24	—	—	28	—	26	—	41	24	20	—
8	26	—	30	24	—	—	27	—	26	—	39	23	—	—
9	25	—	29	23	—	—	26	—	24	—	35	23	—	—
10	25	—	29	22	—	—	25	—	24	—	33	22	—	—
12	23	—	28	21	—	—	23	—	23	—	32	21	—	—
14	21	—	27	20	—	—	22	—	—	—	31	20	—	—
16	—	—	26	—	—	—	—	—	—	—	30	—	—	—
18	—	—	—	—	—	—	—	—	—	—	—	—	—	—
20	—	—	—	—	—	—	—	—	—	—	—	—	—	—
22	—	—	—	—	—	—	—	—	—	—	—	—	—	—
24	—	—	—	—	—	—	—	—	—	—	—	—	—	—

NOTE:

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

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