1864814655

Tabela porównawcza twardości Rockwella HRB a twardościami Rockwella innych skali z twardością Brinella dla motali o twardości poniżej 240 HB

	T w	a r d	ość			Twa	r d	OŚĆ
Rockwella			Brinella /kulka stalowa/		Rockwella			Brinella /kulka stalowa/
HRB	HRF	HRA	10/500	10/5000	HRB	HRF	HRA	10/500	10/5000
49	85,0	-	82		24	70,5	24,0	-	-
48	84,5	34,5	81	-	23	70,0	23,5	63	-
47	84,0	54,0	80	“	22	69,5	25,0	-	-
46	85,0	33,5	-		21	63,0	22,5	62	-
45	82,5	33,0	79		20	68,5	22,0	-	-
44	82,0	32,5	78		19	68,0	21,5	61	-
45	81,5	52,0	77	—	18	67,0	-	-	-
42	81,0	31,5	76		17	66,5	21,0	60	-
41	80,5	51,0	75	-	16	66,0	20,5	-	-
40	79,5	-	-	-	15	65,5	M O O	59	-
39	79,0	30,5	74		14	65,0	-		-
38	78,5	50,0	73		13	64,5	-	58	-
37	78,0	29,5	72	-	12	64,0	“		-
36	77,5	29,0	-	_	11	63,5	-	-	-
35	77,0	28,5	71	-	10	65,0	-	57	-
34	76,5	28,0	70	-	9	62,0	-		-
33	75,5	-	69	-	8	61,5	-		-
32	75,0	27,5	-	-	7	61,0	-	56	-
31	74,5	27,0	68		6	60,5	-		-
30	74,0	26,5	67	-	5	60,0	-	55	-
29	73,5	26,0	-	-	4	59,5		“	-
28	75,0	25,5	66	-	5	59,0	-	-	-
27	72,5	25,0	-	_	2	58,0	-	54	-
26	72,0	24,5	65		1	57,5	-	-
25	71,0	“	64	“	^0 _	57,0	"	55 —

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