sales@callcott-downey.com.au
(08) 9451 4144

HARDNESS CONVERSION CHART

RockwellRockwell SuperficialBrinellVickersShore 
ABCDEF15-N30-N45-N30-T3000 kg500 kg136Approx Tensile Strength (psi)
60kg Brale100kg 1/16" Ball150kg Brale100kg Brale100kg 1/8" Ball60kg 1/16" Ball15kg Brale30kg Brale45kg Brale30 kg 1/16" Ball10mm Ball Steel10mm Ball SteelDiamond PyramidSciero-scope
86.5---7078.5------948677.6---------1076101---
86---6977.7------93.58576.5---------104499---
85.6---6876.9------93.284.475.4---------94097---
85---6776.1------92.983.674.2---------90095---
84.5---6675.4------92.582.873.2---------86592---
83.9---6574.5------92.281.972---739---83291---
83.4---6473.8------91.881.171---722---80088---
82.8---6373------91.480.169.9---705---77287---
82.3---6272.2------91.179.368.8---688---74685---
81.8---6171.5------90.778.467.7---670---72083---
81.2---6070.7------90.277.566.6---654---69781320000
80.7---5969.9------89.876.665.5---634---67480310000
80.1---5869.2------89.375.764.3---615---65378300000
79.6---5768.5------88.974.863.2---595---63376290000
79---5667.7------88.373.962---577---61375282000
78.51205566.9------87.97360.9---560---59574274000
781205466.1------87.47259.8---543---57772266000
77.41195365.4------86.971.258.6---525---56071257000
76.81195264.6------86.470.257.4---500---54469245000
76.31185163.8------85.969.456.1---487---52868239000
75.91175063.1------85.568.555---475---51367233000
75.21174962.1------8567.653.8---464---49866227000
74.71164861.4------84.566.752.5---451---48464221000
74.11164760.8------83.965.851.4---442---47163217000
73.61154660------83.564.850.3---432---45862212000
73.11154559.2------836449---421---44660206000
72.51144458.5------82.563.147.8---409---43458200000
721134357.7------8262.246.7---400---42357196000
71.51134256.9------81.561.345.5---390---41256191000
70.91124156.2------80.960.444.3---381---40255187000
70.41124055.4------80.459.543.1---371---39254182000
69.91113954.6------79.958.641.9---362---38252177000
69.41103853.8------79.457.740.8---353---37251173000
68.91103753.1------78.856.839.6---344---36350169000
68.41093652.3------78.355.938.4---336---35449165000
67.91093551.5------77.75537.2---327---34548160000
67.41083450.8------77.254.236.1---319---33647156000
66.81083350------76.653.334.9---311---32746152000
66.31073249.2------76.152.133.7---301---31844147000
65.81063148.4------75.651.332.5---294---31043144000
65.31053047.7------7550.431.3---286---30242140000
64.71042947------74.549.530.1---279---29441137000
64.31042846.1------73.948.628.9---271---28641133000
63.81032745.2------73.347.727.8---264---27940129000
63.31032644.6------72.846.826.7---258---27239126000
62.81022543.8------72.245.925.5---253---26638124000
62.41012443.1------71.64524.3---247---26037121000
621002342.1------714423.18224020125436118000
61.5992241.6------70.543.22281.523419524835115000
61982140.9------69.942.320.78122818924335112000
60.5972040.1------69.441.519.680.522218423834109000
599618------------------8021617923033106000
589516------------------7921017522232103000
57.59415------------------78.520517121331100000
579313------------------782001672083098000
56.59212------------------77.51951632042996000
569110------------------771901601962893000
55.5909------------------761851571922791000
55898------------------75.51801541882688000
54887------------------751761511842686000
53.5876------------------74.51721481802684000
53865------------------741691451762583000
52.5854------------------73.51651421732581000
52843------------------731621401702579000
51832------------------721591371662478000
50.5821------------------71.51561351632476000
50810------------------711531331602475000
49.580---------------------70150130------73000
4979---------------------69.5147128---------
48.578---------------------69144126---------
4877---------------------68141124---------
4776---------------------67.5139122---------
46.575---------99.5---------67137120---------
4674---------99---------66135118---------
45.573---------98.5---------65.5132116---------
4572---------98---------65130114---------
44.571------10097.5---------64.2127112---------
4470------99.597---------63.5125110---------
43.569------9996---------62.8123109---------
4368------9895.5---------62121107---------
42.567------97.595---------61.4119106---------
4266------9794.5---------60.5117104---------
41.865------9694---------60.1116102---------
41.564------95.593.5---------59.5114101---------
4163------9593---------58.711299---------
40.562------94.592---------5811098---------
4061------93.591.5---------57.310896---------
39.560------9391---------56.510795---------
3959------92.590.5---------55.910694---------
38.558------9290---------5510492---------
3857------9189.5---------54.610291---------
37.856------90.589---------5410190---------
37.555------9088---------53.29989---------
3754------89.587.5---------52.5---87---------
36.553------8987---------51.8---86---------
3652------8886.5---------51---85---------
35.551------87.586---------50.4---84---------
3550------8785.5---------49.5---83---------
34.849------86.585---------49.1---82---------
34.548------85.584.5---------48.5---81---------
3447------8584---------47.7---80---------
33.546------84.583---------47---79---------
3345------8482.5---------46.2---79---------
32.544------83.582---------45.5---78---------
3243------82.581.5---------44.8---77---------
31.542------8281---------44---76---------
3141------81.580.5---------43.4---75---------
30.840------8179.5---------43---74---------
30.539------8079---------42.1---74---------
3038------79.578.5---------41.5---73---------
29.537------7978---------40.7---72---------
2936------78.577.5---------40---71---------
28.535------7877---------39.3---71---------
2834------7776.5---------38.5---70---------
27.833------76.575.5---------37.9---69---------
27.532------7675---------37.5---68---------
2731------75.574.5---------36.6---68---------
26.530------7574---------36---67---------
2629------7473.5---------35.2---66---------
25.528------73.573---------34.5---66---------
2527------7372.5---------33.8---65---------
24.526------72.572---------33.1---65---------
24.225------7271---------32.4---64---------
2424------7170.5---------32---64---------
23.523------70.570---------31.1---63---------
2322------7069.5---------30.4---63---------
22.521------69.569---------29.7---62---------
2220------68.568.5---------29---62---------
21.519------6868---------28.1---61---------
21.218------67.567---------27.4---61---------
2117------6766.5---------26.7---60---------
20.516------66.566---------26---60---------
2015------65.565.5---------25.3---59---------
---14------6565---------24.6---59---------
---13------64.564.5---------23.9---58---------
---12------6464---------23.5---58---------
---11------63.563.5---------22.6---57---------
---10------62.563---------21.9---57---------
---9------6262---------21.2---56---------
---8------61.561.5---------20.5---56---------
---7------6161---------19.8---56---------
---6------60.560.5---------19.1---55---------
---5------6060---------18.4---55---------
---4------5959.5---------18---55---------
---3------58.559---------17.1---54---------
---2------5858---------16.4---54---------
---1------57.557.5---------15.7---53---------
---0------5757---------15---53---------