Tabela de comparação de dureza de metal: HV, HB, HRC

Metal Hardness Comparison Table: HV, HB, HRC

April 30, 2024 Roberto Magalhães

HV, HB, HRC Hardness Comparison Chart

Hardness testing is the simplest and most direct method among mechanical property tests. To replace certain mechanical property tests with hardness tests, a relatively accurate conversion relationship between hardness and strength is required in production.

Experience has shown that there is an approximate relationship between the various hardness values of metallic materials and between hardness values and strength values. This is because the hardness value is determined by the resistance to initial plastic deformation and the resistance to continuous plastic deformation. The greater the strength of the material, the greater the resistance to plastic deformation and, therefore, the higher the hardness value.

Metal Hardness Comparison Table HV, HB, HRC

1. Hardness comparison: Vickers hardness vs Brinell hardness vs Rockwell hardness

Tensile strength N/ ^mm2	Vickers hardness	Brinell hardness	Rockwell hardness
Rm	High voltage	HB	CDH
250	80	76
270	85	80.7
285	90	85.2
305	95	90.2
320	100	95
335	105	99.8
350	110	105
370	115	109
380	120	114
400	125	119
415	130	124
430	135	128
450	140	133
465	145	138
480	150	143
490	155	147
510	160	152
530	165	156
545	170	162
560	175	166
575	180	171
595	185	176
610	190	181
625	195	185
640	200	190
660	205	195
675	210	199
690	215	204
705	220	209
720	225	214
740	230	219
755	235	223
770	240	228	20.3
785	245	233	21.3
800	250	238	22.2
820	255	242	23.1
835	260	247	24
850	265	252	24.8
865	270	257	25.6
880	275	261	26.4
900	280	266	27.1
915	285	271	27.8
930	290	276	28.5
950	295	280	29.2
965	300	285	29.8
995	310	295	31
1030	320	304	32.2
1060	330	314	33.3
1095	340	323	34.4
1125	350	333	35.5
1115	360	342	36.6
1190	370	352	37.7
1220	380	361	38.8
1255	390	371	39.8
1290	400	380	40.8
1320	410	390	41.8
1350	420	399	42.7
1385	430	409	43.6
1420	440	418	44.5
1455	450	428	45.3
1485	460	437	46.1
1520	470	447	46.9
1557	480	456	47
1595	490	466	48.4
1630	500	475	49.1
1665	510	485	49.8
1700	520	494	50.5
1740	530	504	51.1
1775	540	513	51.7
1810	550	523	52.3
1845	560	532	53
1880	570	542	53.6
1920	580	551	54.1
1955	590	561	54.7
1995	600	570	55.2
2030	610	580	55.7
2070	620	589	56.3
2105	630	599	56.8
2145	640	608	57.3
2180	650	618	57.8
	660		58.3
	670		58.8
	680		59.2
	690		59.7
	700		60.1
	720		61
	740		61.8
	760		62.5
	780		63.3
	800		64
	820		64.7
	840		65.3
	860		65.9
	880		66.4
	900		67
	920		67.5
	940

2. Hardness comparison chart of common ferrous metals (approximate intensity conversion)

Rockwell	Rockwell	Vickers	Brinell	Tensile strength
CDH	HR	High voltage	HB	N/ ^mm2
17	–	211	211	710
17.5	–	214	214	715
18	–	216	216	725
18.5	–	218	218	730
19	–	221	220	735
19.5	–	223	222	745
20	–	226	225	750
20.5	–	229	227	760
21	–	231	229	765
21.5	–	234	232	775
22	–	237	234	785
22.5	–	240	237	790
23	–	243	240	800
23.5	–	246	242	810
24	–	249	245	820
24.5	–	252	248	830
25	–	255	251	835
25.5	–	258	254	850
26	–	261	257	860
26.5	–	264	260	870
27	–	268	263	880
27.5	–	271	266	890
28	–	274	269	900
28.5	–	278	273	910
29	–	281	276	920
29.5	–	285	280	935
30	–	289	283	950
30.5	–	292	287	960
31	–	296	291	970
31.5	–	300	294	980
32	–	304	298	995
32.5	–	308	302	1010
33	–	312	306	1020
33.5	–	316	310	1035
34	–	320	314	1050
34.5	–	324	318	1065
35	–	329	323	1080
35.5	–	333	327	1095
36	–	338	332	1110
36.5	–	342	336	1125
37	–	347	341	1140
37.5	–	352	345	1160
38	–	357	350	1175
38.5	–	362	355	1190
39	70	367	360	1210
39.5	70.3	372	365	1225
40	70.8	382	375	1260
40.5	70.5	377	370	1245
41	71.1	388	380	1280
41.5	71.3	393	385	1300
42	71.6	399	391	1320
42.5	71.8	405	396	1340
43	72.1	411	401	1360
43.5	72.4	417	407	1385
44	72.6	423	413	1405
44.5	72.9	429	418	1430
45	73.2	436	424	1450
45.5	73.4	443	430	1475
46	73.7	449	436	1500
46.5	73.9	456	442	1525
47	74.2	463	449	1550
47.5	74.5	470	455	1575
48	74.7	478	461	1605
48.5	75	485	468	1630
49	75.3	493	474	1660
49.5	75.5	501	481	1690
50	75.8	509	488	1720
50.5	76.1	517	494	1750
51	76.3	525	501	1780
51.5	76.6	534	–	1815
52	76.9	543	–	1850
52.5	77.1	551	–	1885
53	77.4	561	–	1920
53.5	77.7	570	–	1955
54	77.9	579	–	1995
54.5	78.2	589	–	2035
55	78.5	599	–	2075
55.5	78.7	609	–	2115
56	79	620	–	2160
56.5	79.3	631	–	2205
57	79.5	642	–	2250
57.5	79.8	653	–	2295
58	80.1	664	–	2345
58.5	80.3	676	–	2395
59	80.6	688	–	2450
59.5	80.9	700	–	2500
60	81.2	713	–	2555
60.5	81.4	726	–	–
61	81.7	739	–	–
61.5	82	752	–	–
62	82.2	766	–	–
62.5	82.5	780	–	–
63	82.8	795	–	–
63.5	83.1	810	–	–
64	83.3	825	–	–
64.5	83.6	840	–	–
65	83.9	856	–	–
65.5	84.1	872	–	–
66	84.4	889	–	–
66.5	84.7	906	–	–
67	85	923	–	–
67.5	85.2	941	–	–
68	85.5	959	–	–
68.5	85.8	978	–	–
69	86.1	997	–	–
69.5	86.3	1017	–	–
70	86.6	1037	–	–

Download the hardness table of ferrous and non-ferrous metals

Hardness Conversion Chart

(1) Hardness conversion chart for common metals (such as carbon steel, alloy steel, etc.)

Rockwell hardness				Rockwell surface hardness			Vickers	Brinell	Coast
HR	HRB	CDH	HR	15N	30N	45N	High voltage	HB	SH
60kgf	100kgf	150kgf	100kgf	15kgf	30kgf	45kgf	50kgf	3,000kgf	JIS
85.6		68	76.9	93.2	84.4	75.4	940		97.6
85.3		67.5	76.5	93	84	74.3	920		96.4
85		67	76.1	92.9	83.6	74.2	900		95.2
84.7		66.5	75.7	92.7	83.1	73.6	880		94
84.4		65.9	75.3	92.5	82.7	73.1	860		92.8
84.1		65.3	74.8	92.3	82.2	72.2	840		91.5
83.8		64.7	74.3	92.1	81.7	71.8	820		90.2
83.4		64	73.8	91.8	81.1	71	800		88.9
83		63.3	73.3	91.5	80.4	70.2	780		87.5
82.6		62.5	72.6	91.2	79.7	69.4	760		86.2
82.2		61.8	72.1	91	79.1	68.6	740		84.8
81.8		61	71.5	90.7	78.4	67.7	720		83.3
81.3		60.1	70.8	90.3	77.6	66.7	700		81.8
81.1		59.7	70.5	90.1	77.2	66.2	690		81.1
80.8		59.2	70.1	89.8	76.8	65.7	680		80.3
80.6		58.8	69.8	89.7	76.4	65.3	670		79.6
80.3		58.3	69.4	89.5	75.9	64.7	660		78.8
80		57.8	69	89.2	75.5	64.1	650		78
79.8		57.3	68.7	89	75.1	63.5	640		77.2
79.5		56.8	68.3	88.8	74.6	63	630		76.4
79.2		56.3	67.9	88.5	74.2	62.4	620		75.6
78.9		55.7	67.5	88.2	73.6	61.7	610		74.7
78.6		55.2	67	88	73.2	61.2	600		73.9
78.4		54.7	66.7	87.8	72.7	60.5	590		73.1
78		54.1	66.2	87.5	72.1	59.9	580		72.2
77.8		53.6	65.8	87.2	71.7	59.3	570		71.3
77.4		53	65.4	86.9	71.2	58.6	560		70.4
77		52.3	64.8	86.6	70.5	57.8	550	505	69.6
76.7		51.7	64.4	86.3	70	57	540	496	68.7
76.4		51.1	63.9	86	69.5	56.2	530	488	67.7
76.1		50.5	63.5	85.7	69	55.6	520	480	66.8
75.7		49.8	62.9	85.4	68.3	54.7	510	473	65.9
75.3		49.1	62.2	85	67.7	53.9	500	465	64.9
74.9		48.4	61.6	84.7	67.1	53.1	490	456	64
74.5		47.7	61.3	84.3	66.4	52.2	480	448	63
74.1		46.9	60.7	83.9	65.7	51.3	470	441	62
73.6		46.1	60.1	83.6	64.9	50.4	460	433	61
73.3		45.3	59.4	83.2	64.3	49.4	450	425	60
72.8		44.5	58.8	82.8	63.5	48.4	440	415	59
72.3		43.6	58.2	82.3	62.7	47.4	430	405	58
71.8		42.7	57.5	81.8	61.9	46.4	420	397	56.9
71.4		41.8	56.8	81.4	61.1	45.3	410	388	55.9
70.8		40.8	65	81	60.2	44.1	400	379	54.8
70.3		39.8	55.2	80.3	59.3	42.9	390	369	53.7
69.8	110	38.8	54.4	79.8	58.4	41.7	380	360	52.6
69.2		37.7	53.6	79.2	57.4	40.4	370	350	51.5
68.7	109	36.6	52.8	78.6	56.4	39.1	360	341	50.4
68.1		35.5	51.9	78	55.4	37.8	350	331	49.3
67.6	108	34.4	51.1	77.4	54.4	36.5	340	322	48.1
67		33.3	50.2	76.8	53.6	35.2	330	313	47
66.4	107	32.2	49.4	76.2	52.3	33.9	320	303	45.8
65.8		31.6	48.4	75.8	51.8	32.8	310	294	44.6
65.2	105.5	29.8	47.5	74.9	50.2	31.1	300	284	43.4
64.8		29.2	47.1	74.6	49.7	30.4	295	280	42.8
64.5	104.5	28.5	46.5	74.2	49	29.5	290	275	42.2
64.2		27.8	46	73.8	48.4	28.7	285	270	41.6
63.8	103.5	27.1	45.3	73.4	47.8	27.9	280	265	40.9
63.5		26.4	44.9	73	47.2	27.1	275	261	40.3
63.1	102	25.6	44.3	72.6	46.4	26.2	270	256	39.7
62.7		24.8	43.7	72.1	45.7	25.2	265	252	39
62.4	101	24	43.1	71.6	45	24.3	260	247	38.4
62		23.1	42.2	71.1	44.2	23.2	255	243	37.8
61.6	99.5	22.2	41.7	70.6	43.4	22.2	250	238	37.2
61.2		21.3	41.1	70.1	42.5	21.1	245	233	36.5
60.7	98.1	20.3	40.3	69.6	41.7	19.9	240	228	35.9
	96.7	18					230	219	34.1
	95	15.7					220	209	33.2
	93.4	13.4					210	200	31.8
	91.5	11					200	190	30.4
	89.5	8.5					190	181	29
	87.1	6					180	171	27.7
	85	3					170	162	26.5
	81.7	0					160	152	25
	78.7						150	143	23.7
	78						140	133	22.1
	71.2						130	124	20.6
	66.7						120	114	19.1
	62.3						110	105	17.6
	56.2						100	95	16.1

(2) Hardness conversion chart for soft metals (such as copper and aluminum)

Rockwell hardness		Rockwell surface hardness			Vickers hardness
HRB	HRF	15T	30T	45T	High voltage
100kgf	60kgf	15kgf	30kgf	45kgf	50kgf
93.5	110	90	77.5	66	196
	109.5			65.5	194
93			77	65	192
92.5	109		76.5	64.5	190
92		89.5		64	188
91.5	108.5		76	63.5	186
91			75.5	63	184
90.5	108	89		62.5	182
90	107.5		75	62	180
89			74.5	61.5	178
88.5	107			61	176
88		88.5	74	60.5	174
87.5	106.5		73.5	60	172
87				59.5	170
86	106	88	73	59	168
85.5			72.5	58.5	166
85	105.5		72	58	164
84	105	87.5		57.5	162
83.5			71.5	56.7	160
83	104.5		71	56	158
82	104	87	70.5	55.5	156
81.5	103.5		70	54.5	154
80.5	103			54	152
80		86.5	69.5	53.5	150
79	102.5		69	53	148
78	102		68.5	52.5	146
77.5	101.5	86	68	51.5	144
77	101		67.5	51	142
76	100.5	85.5	67	50	140
75	100		66.5	49	138
74.5	99.5	85	66	48	136
73.5	99		65.5	47.5	134
73	98.5	84.5	65	46.5	132
72	98	84	64.5	45.5	130
71	97.5		63.5	45	128
70	97	83.5	63	44	126
69	96.5		62.5	43	124
68	96	83	62	42	122
67	95.5		61	41	120
66	95	82.5	60.5	40	118
65	94.5	82	60	39	116
64	94	81.5	59.5	38	114
63	93	81	58.5	37	112
62	92.6	80.5	58	35.5	110
61	92		57	34.5	108
59.5	91.2	80	56	33	106
58	90.5	79.5	55	32	104
57	89.8	79	54.5	30.5	102
56	89	78.5	53.5	29.5	100
54	88	78	52.5	28	98
53	87.2	77.5	51.5	26.5	96
61.6	86.6	77	50.5	24.5	94
49.5	85.4	76.5	49	23	92
47.5	84.4	75.5	48	21	90
46	83.5	75	47	19	88
44	82.3	74.5	45.5	17	86
42	81.2	73.5	44	14.5	84
40	80	73	43	12.5	82
37.5	78.6	72	41	10	80
35	77.4	71.5	39.5	7.5	78
32.5	76	70.5	38	4.5	76
30	74.8	70	36	1	74
27.5	73.2	69	34		72
24.5	71.6	68	32		70
21.5	70	67	30		68
18.5	68.5	66	28		66
15.5	66.8	65	25.5		64
12.5	65	63.5	23		62
10	63	62.5	20.5		60
	61	61	18		58
	58.8	60	15		56
	56.5	58.5	12		54
	53.5	57			52
	50.5	55.5			50
	49	54.5			49
	47	53.5			48
	45				47
	43				46
	40				45

Approximate HRC/HB Conversion Tips

When the hardness is greater than 20HRC, 1HRC≈10HB,
When the hardness is less than 20HRC, 1HRC≈11.5HB.

Note: When considering cutting processing, a general conversion of 1HRC ≈ 10HB applies (the hardness of the workpiece material may vary slightly).

The most commonly used indentation hardness tests for metallic materials are the Brinell, Rockwell, and Vickers hardness tests.

The hardness value indicates the ability of a material to resist plastic deformation caused by the intrusion of another object.

When measuring hardness using the rebound method, the hardness value represents the extent of the elastic deformation function of the metal.

What is metallic hardness?

Hardness is a metric that measures a material's resistance to local deformations, such as plastic deformation, indentations or scratches.

It is a crucial factor in determining the hardness of a material.

Types of metal hardness

According to different testing methods, there are three types of hardness.

① Scratch hardness

Hardness is mainly used to compare the resistance to local deformation of various minerals.

The process involves using a rod with a hard and soft end to test the material by sliding it along the rod.

The softness or hardness of the material is determined based on the length of the scratch it leaves on the shaft.

Typically, scratches made by harder materials are longer and those made by softer materials are shorter.

② Indentation hardness

Indentation hardness test is mainly used to evaluate metal materials. It involves applying a specific indenter to the surface of the material under test with a specific load.

Material hardness is determined by comparing the amount of local plastic deformation at the surface of the material.

There are several types of indentation hardness tests, including Brinell hardness, Rockwell hardness, Vickers hardness, and microhardness, which differ in terms of the indenter used, the load applied, and the duration of the load.

③ Recovery hardness

The rebound hardness test is mainly used for metallic materials. The method involves using a special small hammer that drops from a specific height to impact the material sample being tested.

The hardness of the material is determined by the amount of strain energy stored and then released from the sample during impact, which is measured by the rebound height of the hammer.