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Hardness Conversion Table

Vickers
Brinell
Brinell
Rockwell
Rockwell
Rockwell
Shore
Tensile

Strength
1,000 psi

10 mm
Steel Ball

10 mm
Carbide Ball

A

B

C

 

680

- -

638

80.8

- -

59.2

80

329

640

- -

601

79.8

- -

57.3

77

309

600

- -

564

78.6

- -

55.2

74

289

550

505

517

77.0

- -

52.3

- -

264

500

465

471

75.3

- -

49.1

66

240

480

448

452

74.5

- -

47.7

64

230

460

433

433

73.6

- -

46.1

62

220

440

415

415

72.8

- -

44.5

59

210

420

387

387

71.8

- -

42.7

57

200

400

379

379

70.8

- -

40.8

55

190

390

369

369

70.3

- -

39.8

- -

185

380

360

360

69.8

(110.0)

38.8

52

180

370

350

350

69.2

- -

37.7

- -

175

360

341

341

68.7

(109.0)

36.6

50

170

350

331

331

68.1

- -

35.5

- -

166

340

322

322

67.6

(108.0)

34.4

47

161

330

313

313

67.0

- -

33.3

- -

156

320

303

303

66.4

(107.0)

32.2

45

151

310

294

294

65.8

- -

31.0

- -

146

300

284

284

65.2

(105.5)

29.8

42

141

295

280

280

64.8

- -

29.2

- -

139

290

275

275

64.5

(104.5)

28.5

41

136

285

270

270

64.2

- -

27.8

- -

134

280

265

265

63.8

(103.5)

27.1

40

131

275

261

261

63.5

- -

26.4

- -

129

270

256

256

63.1

(102.0)

25.6

38

126

265

252

252

62.7

- -

24.8

- -

124

260

247

247

62.4

(101.0)

24.0

37

121

255

243

243

62.0

- -

23.1

- -

119

250

238

238

61.6

99.5

22.2

36

116

245

233

233

61.2

- -

21.3

- -

114

240

228

228

60.7

98.1

20.3

34

111

230

219

219

- -

96.7

(18.0)

33

106

220

209

209

- -

95.0

(15.7)

32

101

210

200

200

- -

93.4

(13.4)

30

97

200

190

190

- -

91.5

(11.0)

29

92

190

181

181

- -

89.5

(8.5)

28

88

180

171

171

- -

87.1

(6.0)

26

84

170

162

162

- -

85.0

(3.0)

25

79

160

152

152

- -

81.7

(0.0)

24

75

150

143

143

- -

78.7

- -

22

71

140

133

133

- -

75.0

- -

21

66

130

124

124

- -

71.2

- -

20

62

120

114

114

- -

66.7

- -

- -

57

110

105

105

- -

62.3

- -

- -

- -

100

95

95

- -

56.2

- -

- -

- -

95

90

90

- -

52.2

- -

- -

- -

90

86

86

- -

48.0

- -

- -

- -

85

81

81

- -

41.0

- -

- -

- -

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