Hardness Conversion Calculator ASTM E140 Brinell Vickers Rockwell Knoop Scleroscope

Enter the value, select the conversion and click on calculate. The result will be displayed on Hardness Conversion Calculator. Hardness Conversion Calculator are for Austenitic Stainless Steel and formulas as per ASTM E140-12. HRB = Rockwell Hardness, HB = Brinell hardness

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¹⁾Hardness Conversion Calculator for metals according to ASTM E140 - 12,Standard Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness, Superficial Hardness, Knoop Hardness, Scleroscope Hardness, and Leeb Hardness. Conversion for Non-Austenitic Steel, Table 1. The accuracy of the conversion depends on the accuracy of the provided data and the resulting curve-fits.

²⁾ Indentation hardness is not a single fundamental property but a combination of properties, and varies with the type of test. The modulus of elasticity and the depth of indentation influence conversions. Therefore separate conversion tables are neccessary for different materials.

³⁾Brinell Hardness numbers in parentheses are outsite the range (HB>630) This limit is set to avoid errors introduced by the deformation of the ball indenter itself.

Rockwell Superficial Hardness Scales

ScaleIndenter TypeMinor Load F0 kgfMajor Load F1 kgfTotal Load F kgf	Value of E
HR 15 NN Diamond cone31215	100
HR 30 NN Diamond cone32730	100
HR 45 NN Diamond cone34245	100
HR 15 T1/16" steel ball31215	100
HR 30 T1/16" steel ball32730	100
HR 45 T1/16" steel ball34245	100
HR 15 W1/8" steel ball31215	100
HR 30 W1/8" steel ball32730	100
HR 45 W1/8" steel ball34245	100
HR 15 X1/4" steel ball31215	100
HR 30 X1/4" steel ball32730	100
HR 45 X1/4" steel ball34245	100
HR 15 Y1/2" steel ball31215	100
HR 30 Y1/2" steel ball32730	100
HR 45 Y1/2" steel ball34245	100

Rockwell Brinell Vickers Shore Hardness Conversion Chart

Rockwell Hardness						Rockwell Superficial				Brinell Hardness		Vickers Hardness	Shore
A	B	C	D	E	F	15-N	30-N	45 -N	30-T	3000 kg	500 kg	136		Approx Tensile Strength(Mpa)
60kg Brale	100 kg 1/16" Ball	150 kg	100 kg	100 kg 1/8" Ball	60 kg 1/16" Ball	15 kg Brale	30 kg	45 kg	30 kg 1/16" Ball	10mm Ball Steel	10mm Ball Steel	Diamond Pyramid	Sciero - scope	Approx Tensile Strength(Mpa)
86.5	---	70	78.5	---	---	94.0	86.0	77.6	---	---	---	1076	101	---
86.0	---	69	77.7	---	---	93.5	85.0	76.5	---	---	---	1044	99	---
85.6	---	68	76.9	---	---	93.2	84.4	75.4	---	---	---	940	97	---
85.0	---	67	76.1	---	---	92.9	83.6	74.2	---	---	---	900	95	---
84.5	---	66	75.4	---	---	92.5	82.8	73.2	---	---	---	865	92	---
83.9	---	65	74.5	---	---	92.2	81.9	72.0	---	739	---	832	91	---
83.4	---	64	73.8	---	---	91.8	81.1	71.0	---	722	---	800	88	---
82.8	---	63	73.0	---	---	91.4	80.1	69.9	---	705	---	772	87	---
82.3	---	62	72.2	---	---	91.1	79.3	68.8	---	688	---	746	85	---
81.8	---	61	71.5	---	---	90.7	78.4	67.7	---	670	---	720	83	---
81.2	---	60	70.7	---	---	90.2	77.5	66.6	---	654	---	697	81	220
80.7	---	59	69.9	---	---	89.8	76.6	65.5	---	634	---	674	80	213
80.1	---	58	69.2	---	---	89.3	75.7	64.3	---	615	---	653	78	207
79.6	---	57	68.5	---	---	88.9	74.8	63.2	---	595	---	633	76	200
79.0	---	56	67.7	---	---	88.3	73.9	62.0	---	577	---	613	75	194
78.5	120	55	66.9	---	---	87.9	73.0	60.9	---	560	---	595	74	188
78.0	120	54	66.1	---	---	87.4	72.0	59.8	---	543	---	577	72	182
77.4	119	53	65.4	---	---	86.9	71.2	58.6	---	525	---	560	71	176
76.8	119	52	64.6	---	---	86.4	70.2	57.4	---	500	---	544	69	169
76.3	118	51	63.8	---	---	85.9	69.4	56.1	---	487	---	528	68	165
75.9	117	50	63.1	---	---	85.5	68.5	55.0	---	475	---	513	67	161
75.2	117	49	62.1	---	---	85.0	67.6	53.8	---	464	---	498	66	157
74.7	116	48	61.4	---	---	84.5	66.7	52.5	---	451	---	484	64	152
74.1	116	47	60.8	---	---	83.9	65.8	51.4	---	442	---	471	63	150
73.6	115	46	60.0	---	---	83.5	64.8	50.3	---	432	---	458	62	146
73.1	115	45	59.2	---	---	83.0	64.0	49.0	---	421	---	446	60	142
72.5	114	44	58.5	---	---	82.5	63.1	47.8	---	409	---	434	58	138
72.0	113	43	57.7	---	---	82.0	62.2	46.7	---	400	---	423	57	135
71.5	113	42	56.9	---	---	81.5	61.3	45.5	---	390	---	412	56	132
70.9	112	41	56.2	---	---	80.9	60.4	44.3	---	381	---	402	55	129
70.4	112	40	55.4	---	---	80.4	59.5	43.1	---	371	---	392	54	125
69.9	111	39	54.6	---	---	79.9	58.6	41.9	---	362	---	382	52	122
69.4	110	38	53.8	---	---	79.4	57.7	40.8	---	353	---	372	51	119
68.9	110	37	53.1	---	---	78.8	56.8	39.6	---	344	---	363	50	117
68.4	109	36	52.3	---	---	78.3	55.9	38.4	---	336	---	354	49	114
67.9	109	35	51.5	---	---	77.7	55.0	37.2	---	327	---	345	48	110
67.4	108	34	50.8	---	---	77.2	54.2	36.1	---	319	---	336	47	108
66.8	108	33	50.0	---	---	76.6	53.3	34.9	---	311	---	327	46	105
66.3	107	32	49.2	---	---	76.1	52.1	33.7	---	301	---	318	44	101
65.8	106	31	48.4	---	---	75.6	51.3	32.5	---	294	---	310	43	99
65.3	105	30	47.7	---	---	75.0	50.4	31.3	---	286	---	302	42	97
64.7	104	29	47.0	---	---	74.5	49.5	30.1	---	279	---	294	41	94
64.3	104	28	46.1	---	---	73.9	48.6	28.9	---	271	---	286	41	92
63.8	103	27	45.2	---	---	73.3	47.7	27.8	---	264	---	279	40	89
63.3	103	26	44.6	---	---	72.8	46.8	26.7	---	258	---	272	39	87
62.8	102	25	43.8	---	---	72.2	45.9	25.5	---	253	---	266	38	86
62.4	101	24	43.1	---	---	71.6	45.0	24.3	---	247	---	260	37	83
62.0	100	23	42.1	---	---	71.0	44.0	23.1	82.0	240	201	254	36	81
61.5	99	22	41.6	---	---	70.5	43.2	22.0	81.5	234	195	248	35	79
61.0	98	21	40.9	---	---	69.9	42.3	20.7	81.0	228	189	243	35	77
60.5	97	20	40.1	---	---	69.4	41.5	19.6	80.5	222	184	238	34	75
59.0	96	18	---	---	---	---	---	---	80.0	216	179	230	33	73
58.0	95	16	---	---	---	---	---	---	79.0	210	175	222	32	71
57.5	94	15	---	---	---	---	---	---	78.5	205	171	213	31	69
57.0	93	13	---	---	---	---	---	---	78.0	200	167	208	30	68
56.5	92	12	---	---	---	---	---	---	77.5	195	163	204	29	66
56.0	91	10	---	---	---	---	---	---	77.0	190	160	196	28	64
55.5	90	9	---	---	---	---	---	---	76.0	185	157	192	27	63
55.0	89	8	---	---	---	---	---	---	75.5	180	154	188	26	61
54.0	88	7	---	---	---	---	---	---	75.0	176	151	184	26	59
53.5	87	6	---	---	---	---	---	---	74.5	172	148	180	26	58
53.0	86	5	---	---	---	---	---	---	74.0	169	145	176	25	57
52.5	85	4	---	---	---	---	---	---	73.5	165	142	173	25	56
52.0	84	3	---	---	---	---	---	---	73.0	162	140	170	25	55
51.0	83	2	---	---	---	---	---	---	72.0	159	137	166	24	54
50.5	82	1	---	---	---	---	---	---	71.5	156	135	163	24	52
50.0	81	0	---	---	---	---	---	---	71.0	153	133	160	24	52
49.5	80	---	---	---	---	---	---	---	70.0	150	130	---	---	50

Hardness Conversion Chart

Brinell Hardness (HB)	Vickers Hardness (HV)	Rockwell (HRB)	Rockwell(HRC)	Ultimate Tensile Strength (N/mm2)
-	640	-	57	-
-	615	-	56	-
-	591	-	54.5	-
-	569	-	53.5	-
-	547	-	52	-
-	528	-	51	-
-	508	-	49.5	-
-	491	-	48.5	1539
444	474	-	47	1520
429	455	-	45.5	1471
415	440	-	44.5	1422
401	425	-	43	1363
388	410	-	42	1314
375	396	-	40.5	1265
363	383	-	39	1236
352	372	-	38	1187
341	360	-	36.5	1157
331	350	-	35.5	1118
321	339	-	34.5	1089
311	328	-	33	1049
302	319	-	32	1020
293	309	-	31	990
285	301	-	30	971
277	292	-	29	941
269	284	-	27.5	912
262	276	-	26.5	892
255	269	100	25.5	873
248	261	99	24	853
241	253	98	23	824
235	247	97	22	794
229	241	96	20.5	775
223	235	-	-	755
217	228	95	-	745
212	223	94	-	716
207	218	93	-	696
197	208	91	-	667
187	197	89	-	637
179	189	87	-	608
170	179	85	-	559
163	172	83	-	539
156	165	81	-	530
149	157	79	-	500
143	150	77	-	481
137	144	74	-	471
131	138	72	-	461
126	133	69	-	451
121	127	67	-	431
116	122	64	-	422
111	117	61	-	402
107	113	-	-	382
103	108	-	-	373

Stainless Steel Tubing, Nickel Alloy Tubing, Brass Alloy Tubing, Copper Nickel Pipe Material Grades
Austenitic Austenite Stainless Steel A213 TP 304 Stainless Steel Tube SA 213 TP 304L Stainless Steel Tube S213 TP 304H Stainless Steel Tube 304NG Stainless Steel S30432 Super 304H Stainless Steel Tubes SUS 305 Stainless Steel Tubing Tubes Pipe Manufacturer SA 213 TP 309S Stainless Steel Tube SA 213 TP 310S Stainless Steel Tube SA 213 TP 316L Stainless Steel Tube SA 213 TP 316H Stainless Steel Tube SA213 TP 316Ti Stainless Steel Tube SA 213 TP 317L Stainless Steel Tube SA 213 TP 321 Stainless Steel Tube SA 213 TP 321H Stainless Steel Tube SA213 TP 347 347H Stainless Steel Tube 253MA S30815 Stainless Steel Tubing Tubes Pipe 353MA S35315 Tubing Tubes Pipe ASTM A564 A693 630 S17400 Stainless Steel Tubing Tubes Pipe Super-Austenitic Stainless Steel A213 B677 904L N8904 Stainless Steel Tubing Tubes Pipe 254 SMo S31254 Stainless Steel Tubing Tubes Pipe Duplex Stainless Steel S32101 Stainless Steel Tubing Tubes Pipe 2205 Duplex Pipe S32205 SA789 A789 S31803 Stainless Steel Tubing Tubes Pipe S32304 Stainless Steel Tubing Tubes Pipe manufacturer	2507 Super Duplex Steel S32750 Stainless Steel Tubing Tubes Pipe S32760 Stainless Steel Tubing Tubes Pipe Ferritic Ferrite Stainless Steel ASTM A268 405 S40500 Stainless Steel Tubing Tubes Pipe ASTM A268 409 S40900 Stainless Steel Tubing Tubes Pipe ASTM A268 430 S43000 Stainless Steel Tubing Tubes Pipe Manufacturer Martensitic Martensite Stainless Steel ASTM A268 410 S41000 Stainless Steel Tubing Tubes Pipe ASTM A268 410S S41008 Stainless Steel Tubing Tubes Pipe Manufacturer AISI 416 Stainless Steel Tubing Tubes Pipe AISI 420 S42000 Stainless Steel Tubing Tubes Pipe EN 10269 EN10302 1.4913 X19CrMoNbVN11-1 EN 10269 EN10302 1.4938 X12CrNiMoV12-3 Incoloy Alloy Tubing A286 Nickel Alloy Tubing Nickel Alloy 20 N08020 Nickel Alloy Tubing Tubes Pipe Incoloy 800 N08800 Nickel Alloy Tubing Tubes Pipe Incoloy 800H N08810 Nickel Alloy Tubing Tubes Pipe Incoloy 800HT N08811 Nickel Alloy Tubing Tubes Pipe Incoloy 825 N08825 Nickel Alloy Tubing Tubes Pipe Incoloy 901 N09901 Nickel Alloy Tubing Tubes Pipe Incoloy 925 N09925 Nickel Alloy Tubing Tubes Pipe Incoloy 926 N08926 Nickel Alloy Tubing Tubes Pipe Stockholder Inconel Alloy Tubing Inconel 600 N06600 Nickel Alloy Tubing Tubes Pipe Inconel 601 N06601 Nickel Alloy Tubing Tubes Pipe Inconel 625 N06625 Nickel Alloy Tubing Tubes Pipe Inconel 706 N09706Nickel Alloy Tubing Tubes Pipe Inconel 718 N07718 Nickel Alloy Tubing Tubes Pipe Inconel X-750 N07750 Nickel Alloy Tubing Tubes Pipe	Hastelloy Alloy Tubing Hastelloy B N10001 Nickel Alloy Tubing Tubes Pipe Manufacturer Hastelloy B2 N10665 Nickel Alloy Tubing Tubes Pipe Hastelloy B3 N10675 Nickel Alloy Tubing Tubes Pipe Supplier Hastelloy C4 N06455 Nickel Alloy Tubing Tubes Pipe Hastelloy C22 N06022 Nickel Alloy Tubing Tubes Pipe Supplier Hastelloy C276 ASTM B622 N10276 Nickel Alloy Tubing Tubes Pipe Hastelloy X N06002 Nickel Alloy Tubing Tubes Pipe Factory Hastelloy G Nickel Alloy Tubing Tubes Pipe Hastelloy G3 N06985 Nickel Alloy Tubing Tubes Pipe Nimonic Alloy Tubing Nimonic 75 N06075 Alloy Tubing Tubes Pipe Nimonic 80A N07080 Alloy Tubing Tubes Pipe Nimonic 90 N07090 Alloy Tubing Tubes Pipe Suppliers Monel Nickel Alloy Tubing Alloy 200 N02200 Nickel Alloy Tubing Tubes Pipe Alloy 201 N02201 Nickel Alloy Tubing Tubes Pipe Monel 400 N04400 Nickel Alloy Tubing Tubes Pipe Monel 401 N04401 Nickel Alloy Tubing Tubes Pipe Manufacturer Monel R 405 N04405 Nickel Alloy Tubing Tubes Pipe Monel K 500 N05500 Nickel Alloy Tubing Tubes Pipe Exporter Brass Alloy Seamless Tubing Tube Pipes C28000 Brass Alloy Seamless Tubing Tube C44300 Brass Alloy Seamless Tubing Tube C68700 Brass Alloy Seamless Tube Tubing Copper Nickel Alloy Pipe C70600 Copper Nickel Pipe C71500 Copper Nickel Pipe

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Stainless Steel Tubing Pipe

304 Stainless Steel Pipe
304L Stainless Steel Pipe
304H Stainless Steel Pipe
304/304L Stainless Steel Tubing
309S Stainless Steel Pipe
310S Stainless Steel Pipe
316L Stainless Steel Tubing
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317L Stainless Steel Pipe
321 321H Stainless Steel
347 347H Stainless Steel
904L N08094 Seamless Tubes
17-4 PH 630 UNS S17400 Stainless Steel
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S31254 254 SMO Pipe
S31803 Stainless Steel
2205 Duplex Pipe Tubing
S32101 Stainless Steel
S32304 Stainless Steel
2507 Super Duplex Pipe
S32750 Super Duplex Pipe
S32760 Super Duplex Steel
1.4462 Stainless Steel Pipe
ASTM A213 | ASTM A269
ASTM A312 | ASTM A511
ASTM A789 | ASTM A790
ASTM B161 / ASME SB 161 | ASTM B111
EN 10216-5
ASTM A789 ASME SA 789 S31803 S32205 S32101 S32750 S32760 S32304 S31500 S31260 Seamless Tubes
EN 10216-5 1.4462 1.4362 1.4162 1.4410 1.4501 Seamless Tubes

Nickel Alloy Tubing:

UNS N08020 Alloy 20 Tubing
UNS N02200 Alloy 200 Tube
UNS N02201 Alloy 201 Pipe
UNS N04400 Monel 400 Tubing
N06600 Inconel 600 Tube
N06601 Inconel 601 Tubing
N06625 Inconel 625 Tubes
N08800 Incoloy 800 Tube
N08810 Incoloy 800H Tube
N08811 Incoloy 800HT Tubing
UNS N08825 Incoloy 825 Pipe
ASTM B622 N10276 C276 Tubing
ASTM B622 N06022 Hastelloy C-22 Alloy Tubes
C28000 Brass Seamless Tubes C44300 Brass Seamless Tubes
C68700 Brass Seamless Tubes
C70600 Copper Nickel Tubes
C71500 Copper Nickel Tubes
DIN 2391 Seamless Precision Steel Tubes
EN 10305-1 E215 E235 E355 Seamless Precision Steel Tube Tubing Tubes
DIN 2393 St28 St34.2 St37.2 St44.2 St52.3 Welded Precision Steel Tubes
EN 10305-2 E195 E235 E355 Welded Cold Drawn Precision Steel Tube