End-Quench Hardenability Bands — 1038 H to 15B21 H - METRIC
Tabulations of Band Limits
“J” Distance Millimeters	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
1.5	58	51	62	55	50	41	51	42	53	44	60	53	48	41
3	56	37	60	45	48	35	49	39	50	39	59	50	48	40
5	49	25	53	31	45	23	44	26	44	24	57	43	46	36
7	33	22	36	27	39	20	38	21	37	20	56	36	43	27
9	29	20	32	25	32	—	34	—	32	—	49	29	38	—
11	27	—	31	24	27	—	30	—	28	—	44	25	30	—
13	26	—	30	23	—	—	27	—	25	—	38	23	—	—
15	25	—	29	22	—	—	25	—	24	—	35	22	—	—
20	24	—	28	20	—	—	23	—	—	—	32	20	—	—
25	22	—	27	—	—	—	—	—	—	—	30	—	—	—
30	—	—	—	—	—	—	—	—	—	—	—	—	—	—
40	—	—	—	—	—	—	—	—	—	—	—	—	—	—
45	—	—	—	—	—	—	—	—	—	—	—	—	—	—
50	—	—	—	—	—	—	—	—	—	—	—	—	—	—

NOTE:

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

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