End-Quench Hardenability Bands — 15B28 H to 1330 H - METRIC
Tabulations of Band Limits
“J” Distance Millimeters	GRADE
	15B28 H		15B30 H		15B35 H		15B37 H		15B41 H		15B48 H		15B62 H		1330 H
	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min
1.5	53	47	55	48	58	51	58	50	60	53	63	56	—	60	56	49
3	53	47	54	47	57	50	57	50	60	52	63	55	—	60	56	47
5	53	46	53	45	56	49	56	49	59	52	62	55	65	60	55	44
7	52	43	52	38	54	45	54	46	58	51	61	54	65	59	53	38
9	51	35	49	25	52	32	53	39	58	50	60	53	65	58	51	32
11	50	24	45	20	47	24	51	31	57	49	59	45	65	56	48	28
13	48	21	38	—	39	21	50	26	56	47	57	33	64	50	45	25
15	45	20	31	—	32	20	47	23	55	41	56	30	64	42	43	24
20	35	—	26	—	27	—	38	20	53	26	49	27	63	34	39	20
25	29	—	23	—	25	—	30	—	50	24	39	25	60	32	35	—
30	26	—	20	—	24	—	28	—	45	23	33	24	56	31	33	—
35	25	—	—	—	23	—	26	—	39	21	31	23	48	30	32	—
40	24	—	—	—	22	—	25	—	35	20	30	22	42	29	31	—
45	23	—	—	—	20	—	23	—	32	—	29	—	37	27	31	—
50	20	—	—	—	—	—	—	—	31	—	28	—	34	26	30	—

NOTE:

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

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