Hardness Conversion Table

Approximate Hardness Equivalents Covering Range of Rockwell C and Rockwell B Scales

VPNROCKWELL SCALESBRINELLSCLERO-
SCOPE
U.T.S.
DPH
HV/10
ABCDEFGHK15N30N45N15T30T45TBHN
500kg
BHN
3000kg

KpsiMpa
186592
8087




979287







178792
7986




969287







171091
7885




969186







163391
7784




969185







155690
7683




969084







147890
7583




958983







140089
7482




958982







132389
7381




958881







124588
7280




958780







116087
7180




948779







107687
7079




948678




101

100486
6978




948577




99

94086
6877




938475




97

90085
6776




938474




95

86585
6675




938373




92

83284
6575




928272



73991

80084
6474




928171



72288

77283
6373




918070



70587

74683
6272




917969



68885

72082
6172




917968



67083

69781
6071




907867



654813202206
67481
5970




907766



634803102137
65380
5869




897664



615783002069
63380
5769




897563



595762902000
61379
5668




887462



577752821944
595791205567




887361



560742741889
577781205466




877260



543722661834
560781195365




877159



523712571772
544771195265




867057



512692451689
528771185164




866956



496682391648
513761175063




866955



481672331607
498751174962




856854



469662271565
484751164861




856753



455642211524
471741164761




846651



443632171496
458741154660




846550



432622121462
446731154559




836449



421602061420
434731144459




836348



409582001379
423721134358




826247



400571961351
412721134257




826146



390561911317
402711124156




816044



381551871289
392711124055




806043



371541821255
382701113955




805942



362521771220
372701103854




795841



353511731193
363691103753




795740



344501691165
354691093652




785638



336491651138
345681093552




785537



327481601103
336681083451




775436



319471561076
327671083350




775335



311461521048
318671073249




765234



301441471014
310661063148

91

765133



29443144993
302661053048

91

755031



28642140965
294651042947

89

755030



27941137945
286651042846

88

744929



27141133917
279641032745

87

734828



26440129889
272641032645

86

734727



25839126869
266631022544

85

724626



25338124855
260631012443

84

724524



24737121834
254621002342

83

71442393827220124036118814
24862992242

81

71432293827119523435115793
24361982141

79

70422193817018922835112772
23861972040

78

69422092816918422234109752
234609719


77




92806918121834107738
230599618


76




92806817921433106731
226599617


75




92806817721033104717
222589516


74




92796717520832102703
217589515


73




92796717120531100690
213589414


73




9179661692033199683
208579313


71




9178661672003098676
204579212


70
100


9178651631953096662
200569211


69
100


9177641621932995655
196569110


68
100


9077641601902893641
19256909


66
99


9076631571852791627
18855898


64
98


9076621541802688607
18454887


63
97


9075611511762686593
18054876


61
97


8975601481722684579
17653865


59
96


8974591451692583572
17253854


58
95


8974581421652581558
16852843


56
94


8873571401622579545
16451832


54
93


8872561371592478538
16051821


53
92


8872551351562476524
15650810


51
91


8771541331532475517
1525080



49
91


877053130150
73503
1484979



48
90


877052128147


1444978



46
89


866951126144


1414877



44
88


866850124141


1394776



43
87


866849122139


1374775


10041
86


856749120137


1354674


9939
85


856648118135


1324673


9938
85


856647116132


1304572


9836
84


846546114130


1274571

1009835
83


846445112127


1254470

1009733
82


846444110125


1234469

999631
81


836343109123


1204368

989630
80


836242107121


1184367

989528
79


836241106119


1164266

979527
78


826140104117


1154265

969425
78


826039102116


1144264

969424
77


826038101114


1134163

959322
76


81593799112


1124162

959221
75


81583698110


1114061

949219
74


81573596108


1104060

939118
73


81573495107


1083959

939116
72


80563294106


1073958

929015
71


80553192104


1063857

919013
71


80553091102


1053856

918912
70


79542990101


1043855

908810
69


7953288999


1033754

90889
68


79532787



1023753

89877
67


78522686



1013652

88876
66


78512585



1003651

88864
65


78512484



1003550

87863
65


77502383



993549

8785

64


77492282



983548

8685

63


77492181



973447

8584

62


76482080



963446

8583

61


76471979



953345

8483

60


76461879



953344

8482

59


75461778



943243

8382

58


75451677



933242

8281

58


75441576



923141

8281

57


74441475



913140

8180

56


74431374



903139

8079

55


74421174



903038

8079

54


73421073



893037

7978

53


7341972



882936

7978
10052


7340871



882935

7877
10052


7240771



872834

7777
9951


7239670



872833

7776
9950


7238569



862832

7675
9949


7138468



862731

7675
9848


7137368



852730

7574
9847


7136267



852629

7474
9846


7036166



842628

7473
9745


7035
66



842527

7373
9745


7034
65



832526

7372
9744


6933
65



832425

7271
9642


6933
64



822424

7171
9642


6932
64



822423

7170
9641


6831
63



812322

7070
9540


6831
63



812321

7069
9539


6830
62



802220

6969
9538


6829
62



802219

6868
9438


6729
61



792118

6867
9437


6728
61



792117

6767
9336


6727
60



782116

6766
9335


6626
60



782015

6666
9334


6626
59



77
14

6565
9233


6625
59



77
13

6565
9232


6524
58



76
12

6464
9232


6524
58



76
11

6464
9131


6523
57



75
10

6363
9130


6422
57



75
9

6262
9129


6422
56



74
8

6262
9028


6421
56



74
7

6161
9027


6320
56



73
6

6161
9026


6320
55



73
5

6060
8926


6319
55



72
4

5960
8925


6218
55



72
3

5959
8824


6217
54



71
2

5858
8823


6217
54



71
1

5858
8822


6116
53



70
0

5757
8721


6115
53



DPH
HV/10
ABCDEFGHK15N30N45N15T30T45TBHN
500kg
BHN
3000kg

KpsiMpa
VPNROCKWELL SCALESBRINELLSCLERO-
SCOPE
U.T.S.


Hardness Conversion or Equivalents:

Hardness conversion between different methods and scales cannot be made mathematically exact for a wide range of materials. Different loads, different shape of indenters, homogeneity of specimen, cold working properties and elastic properties all complicate the problem. All tables and charts should be considered as giving approximate equivalents, particularly when converting to a method or scale which is not physically possible for the particular test material and thus cannot be verified. An example would be converting HV/10 or HR-15N value on a thin coating to the HRC equivalent.





Links To:

Hardness Testing

Rockwell Hardness Test

Rockwell Superficial Hardness Test

Brinell Hardness Test

Vickers Hardness Test

Microhardness Test

Mohs Hardness Test

Scleroscope and other hardness testing methods


Hardness Conversion Tables and Charts:

Hardness Conversion Table(colour version - may take time to load)

Hardness Conversion Table(non-colour version)

Hardness Conversion Chart (1)

Hardness Conversion Chart (2)

Chart of Brinell, Vickers and Ultimate Tensile Strength Equivalents (1)

Chart of Brinell, Vickers andUltimate Tensile Strength Equivalents (2)

Hardness Conversion Table related to Rockwell C Hardness Scale (hard materials) (colour)

Hardness Conversion Table related to Rockwell C Hardness Scale (hard materials) (non-colour)

Hardness Conversion Chart related to Rockwell C Hardness Scales (hard materials)

Estimated Hardness Equivalent Chart related to Rockwell C and Vickers (hard materials)

Hardness Conversion Table related to Rockwell B Hardness Scale (soft metals) (colour)

Hardness Conversion Table related to Rockwell B Hardness Scale (soft metals) (non-colour)

Hardness Conversion Chart related to Rockwell B Hardness Scale (soft metals)

Table of Minimum Test Piece Thickness for Rockwell Hardness Testing using Ball Indenters

Table of Minimum Test Piece Thickness for Rockwell Hardness Testing using Diamond Indenters

HV, MPa and GPa Conversion Calculator

Surface Engineering Forum





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