End-Quench Hardenability Bands — 4626 H to 50B44 H - METRIC
Tabulations of Band Limits
“J” Distance Millimeters	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
1.5	—	—	47	40	48	41	45	38	46	39	48	41	60	53	63	56
3	—	—	47	40	47	39	45	36	46	38	48	40	60	53	63	56
5	—	—	46	38	43	32	44	33	45	35	48	39	60	52	63	56
7	—	—	43	31	38	25	42	28	44	31	46	36	59	51	62	54
9	—	—	39	28	33	22	40	25	42	28	45	32	59	49	61	52
11	—	—	36	25	30	20	37	22	39	25	43	29	58	44	61	49
13	—	—	34	23	28	—	35	20	37	23	40	27	57	38	60	42
15	—	—	32	22	27	—	32	—	34	21	39	25	56	33	59	36
20	—	—	29	21	24	—	29	—	31	—	35	22	50	27	55	30
25	—	—	27	20	23	—	27	—	28	—	32	21	43	24	49	27
30	—	—	26	—	22	—	26	—	27	—	29	20	37	22	42	25
35	—	—	26	—	21	—	25	—	26	—	28	—	35	—	38	23
40	—	—	25	—	20	—	24	—	25	—	27	—	34	—	37	21
45	—	—	25	—	—	—	24	—	25	—	26	—	32	—	35	—
50	—	—	24	—	—	—	23	—	25	—	26	—	30	—	34	—

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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