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Aluminium hardness converter

Convert between Brinell, Vickers and Rockwell with the table in the ASTM E140 standard that is specific to aluminium. Steel tables are not valid for aluminium.

Measured scale

Value

Where it sits against the most common alloys

See the full table (ASTM E140, Table 9)

HB	HV	HRB	HRE	HRH	HR15T	HR30T	HR15W
160	189	91	—	—	89	77	95
155	183	90	—	—	89	76	95
150	177	89	—	—	89	75	94
145	171	87	—	—	88	74	94
140	165	86	—	—	88	73	94
135	159	84	—	—	87	71	93
130	153	81	—	—	87	70	93
125	147	79	—	—	86	68	92
120	141	76	—	—	86	67	92
115	135	72	101	—	86	65	91
110	129	69	100	—	85	63	91
105	123	65	99	—	84	61	91
100	117	60	98	—	83	59	90
95	111	56	96	—	82	57	90
90	105	51	94	108	81	54	89
85	98	46	91	107	80	52	89
80	92	40	88	106	78	50	88
75	86	34	84	104	76	47	87
70	80	28	80	102	74	44	86
65	74	—	75	100	72	—	85
60	68	—	70	97	70	—	83
55	62	—	65	94	67	—	82
50	56	—	59	91	64	—	80
45	50	—	53	87	62	—	79
40	44	—	46	83	59	—	77

Approximate conversions from ASTM E140, Table 9, valid only for wrought aluminium products (extruded and rolled); intermediate values are interpolated. A conversion never replaces measuring on the scale the specification calls for.

What hardness does your part need?

We help you specify the alloy, temper and hardness for the application.

The message is put together with what you are looking at, with no obligation.

Frequently asked questions

Can steel hardness conversion tables be used for aluminium?

No. The ASTM E140 standard has a specific table for wrought aluminium products (Table 9); using the steel tables gives wrong values.

How hard is 6063-T5 aluminium?

About 60 HB (Brinell); in T6 temper it is around 73 HB.

HB	HV	HRB	HRE	HRH	HR15T	HR30T	HR15W
160	189	91	—	—	89	77	95
155	183	90	—	—	89	76	95
150	177	89	—	—	89	75	94
145	171	87	—	—	88	74	94
140	165	86	—	—	88	73	94
135	159	84	—	—	87	71	93
130	153	81	—	—	87	70	93
125	147	79	—	—	86	68	92
120	141	76	—	—	86	67	92
115	135	72	101	—	86	65	91
110	129	69	100	—	85	63	91
105	123	65	99	—	84	61	91
100	117	60	98	—	83	59	90
95	111	56	96	—	82	57	90
90	105	51	94	108	81	54	89
85	98	46	91	107	80	52	89
80	92	40	88	106	78	50	88
75	86	34	84	104	76	47	87
70	80	28	80	102	74	44	86
65	74	—	75	100	72	—	85
60	68	—	70	97	70	—	83
55	62	—	65	94	67	—	82
50	56	—	59	91	64	—	80
45	50	—	53	87	62	—	79
40	44	—	46	83	59	—	77

HB	HV	HRB	HRE	HRH	HR15T	HR30T	HR15W
160	189	91	—	—	89	77	95
155	183	90	—	—	89	76	95
150	177	89	—	—	89	75	94
145	171	87	—	—	88	74	94
140	165	86	—	—	88	73	94
135	159	84	—	—	87	71	93
130	153	81	—	—	87	70	93
125	147	79	—	—	86	68	92
120	141	76	—	—	86	67	92
115	135	72	101	—	86	65	91
110	129	69	100	—	85	63	91
105	123	65	99	—	84	61	91
100	117	60	98	—	83	59	90
95	111	56	96	—	82	57	90
90	105	51	94	108	81	54	89
85	98	46	91	107	80	52	89
80	92	40	88	106	78	50	88
75	86	34	84	104	76	47	87
70	80	28	80	102	74	44	86
65	74	—	75	100	72	—	85
60	68	—	70	97	70	—	83
55	62	—	65	94	67	—	82
50	56	—	59	91	64	—	80
45	50	—	53	87	62	—	79
40	44	—	46	83	59	—	77

HB	HV	HRB	HRE	HRH	HR15T	HR30T	HR15W
160	189	91	—	—	89	77	95
155	183	90	—	—	89	76	95
150	177	89	—	—	89	75	94
145	171	87	—	—	88	74	94
140	165	86	—	—	88	73	94
135	159	84	—	—	87	71	93
130	153	81	—	—	87	70	93
125	147	79	—	—	86	68	92
120	141	76	—	—	86	67	92
115	135	72	101	—	86	65	91
110	129	69	100	—	85	63	91
105	123	65	99	—	84	61	91
100	117	60	98	—	83	59	90
95	111	56	96	—	82	57	90
90	105	51	94	108	81	54	89
85	98	46	91	107	80	52	89
80	92	40	88	106	78	50	88
75	86	34	84	104	76	47	87
70	80	28	80	102	74	44	86
65	74	—	75	100	72	—	85
60	68	—	70	97	70	—	83
55	62	—	65	94	67	—	82
50	56	—	59	91	64	—	80
45	50	—	53	87	62	—	79
40	44	—	46	83	59	—	77