Brinell and Rockwell Hardness Conversion Table Chart

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Metals and Materials

These Conversion Tables presents data in the Rockwell A, B, C, D, E and F hardness range on the relationship among Brinell hardness, Vickers hardness, Rockwell superficial, hardness, and Shore Scleroscope hardness of nonaustenitic steels including carbon, alloy, and tool steels in the as-forged, annealed, normalized, and quenched and tempered conditions provided that they are homogeneous.

Related:

Brinell Hardness Testing Equation

Table A
Brinell Hardness to Rockwell Hardness Conversion Table

Brinell Hardness Rockwell Hardness Tensile Strength
(Approximate)
Psi
Tungsten Carbide
Ball 3000 KG
A Scale 60KG B Scale 100KG C Scale 150KG
- 85.6 - 68.0 -
- 85.3 - 67.5 -
- 85.0 - 67.0 -
767 84.7 - 66.4 -
757 84.4 - 65.9 -
745 84.1 - 65.3 -
733 83.8 - 64.7 -
722 83.4 - 64.0 -
712 - - - -
710 83.0 - 63.3 -
698 82.6 - 62.5 -
684 82.2 - 61.8 -
682 82.2 - 61.7 -
670 81.8 - 61.0 -
656 81.3 - 60.1 -
653 81.2 - 60.0 -
647 81.1 - 59.7 -
638 80.8 - 59.2 329,000
630 80.6 - 58.8 324,000
627 80.5 - 58.7 323,000
601 79.8 - 57.3 309,000
578 79.1 - 56.0 297,000
555 78.4 - 54.7 285,000
534 77.8 - 53.5 274,000
514 76.9 - 52.1 263,000
495 76.3 - 51.0 253,000
477 75.6 - 49.6 243,000
461 74.9 - 48.5 235,000
444 74.2 - 47.1 225,000
429 73.4 - 45.7 217,000
415 72.8 - 44.5 210,000
401 72.0 - 43.1 202,000
388 71.4 - 41.8 195,000
375 70.6 - 40.4 188,000
363 70.0 - 39.1 182,000
352 69.3 - 37.9 176,000
341 68.7 - 36.6 170,000
331 68.1 - 35.5 166,000
321 67.5 - 34.3 160,000
311 66.9 - 33.1 155,000
302 66.3 - 32.1 150,000
293 65.7 - 30.9 145,000
285 65.3 - 29.9 141,000
277 64.6 - 28.8 137,000
269 64.1 - 27.6 133,000
262 63.6 - 26.6 129,000
255 63.0 - 25.4 126,000
248 62.5 - 24.2 122,000
241 61.8 100.0 22.8 118,000
235 61.4 99.0 21.7 115,000
229 60.8 98.2 20.5 111,000
223 - 97.3 20.0 -
217 - 96.4 18.0 105,000
212 - 95.5 17.0 102,000
207 - 94.6 16.0 100,000
201 - 93.8 15.0 98,000
197 - 92.8 - 95,000
192 - 91.9 - 93,000
187 - 90.7 - 90,000
183 - 90.0 - 89,000
179 - 89.0 - 87,000
174 - 87.8 - 85,000
170 - 86.8 - 83,000
167 - 86.0 - 81,000
163 - 85.0 - 79,000
156 - 82.9 - 76,000
149 - 80.8 - 73,000
143 - 78.7 - 71,000
137 - 76.4 - 67,000
131 - 74.0 - 65,000
126 - 72.0 - 63,000
121 - 69.8 - 60,000
116 - 67.6 - 58,000
111 - 65.7 - 56,000

Table B
Rockwell - Rockwell Superficial - Brinell - Vickers - Shore Hardness Conversion

Rockwell

Rockwell Superficial

Brinell

Vickers

Shore Hardnell

A

B

C

D

E

F

15-N

30-N

45-N

30-T

3000 kg

500 kg

136

60kg Brale

100kg 1/16" Ball

150kg Brale

100kg Brale

100kg 1/8" Ball

60kg 1/16" Ball

15kg Brale

30kg Brale

45kg Brale

30 kg 1/16" Ball

10mm Ball Steel

10mm Ball Steel

Diamond Pyramid

Sciero-scope

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

80.7

---

59

69.9

---

---

89.8

76.6

65.5

---

634

---

674

80

80.1

---

58

69.2

---

---

89.3

75.7

64.3

---

615

---

653

78

79.6

---

57

68.5

---

---

88.9

74.8

63.2

---

595

---

633

76

79.0

---

56

67.7

---

---

88.3

73.9

62.0

---

577

---

613

75

78.5

120

55

66.9

---

---

87.9

73.0

60.9

---

560

---

595

74

78.0

120

54

66.1

---

---

87.4

72.0

59.8

---

543

---

577

72

77.4

119

53

65.4

---

---

86.9

71.2

58.6

---

525

---

560

71

76.8

119

52

64.6

---

---

86.4

70.2

57.4

---

500

---

544

69

76.3

118

51

63.8

---

---

85.9

69.4

56.1

---

487

---

528

68

75.9

117

50

63.1

---

---

85.5

68.5

55.0

---

475

---

513

67

75.2

117

49

62.1

---

---

85.0

67.6

53.8

---

464

---

498

66

74.7

116

48

61.4

---

---

84.5

66.7

52.5

---

451

---

484

64

74.1

116

47

60.8

---

---

83.9

65.8

51.4

---

442

---

471

63

73.6

115

46

60.0

---

---

83.5

64.8

50.3

---

432

---

458

62

73.1

115

45

59.2

---

---

83.0

64.0

49.0

---

421

---

446

60

72.5

114

44

58.5

---

---

82.5

63.1

47.8

---

409

---

434

58

72.0

113

43

57.7

---

---

82.0

62.2

46.7

---

400

---

423

57

71.5

113

42

56.9

---

---

81.5

61.3

45.5

---

390

---

412

56

70.9

112

41

56.2

---

---

80.9

60.4

44.3

---

381

---

402

55

70.4

112

40

55.4

---

---

80.4

59.5

43.1

---

371

---

392

54

69.9

111

39

54.6

---

---

79.9

58.6

41.9

---

362

---

382

52

69.4

110

38

53.8

---

---

79.4

57.7

40.8

---

353

---

372

51

68.9

110

37

53.1

---

---

78.8

56.8

39.6

---

344

---

363

50

68.4

109

36

52.3

---

---

78.3

55.9

38.4

---

336

---

354

49

67.9

109

35

51.5

---

---

77.7

55.0

37.2

---

327

---

345

48

67.4

108

34

50.8

---

---

77.2

54.2

36.1

---

319

---

336

47

66.8

108

33

50.0

---

---

76.6

53.3

34.9

---

311

---

327

46

66.3

107

32

49.2

---

---

76.1

52.1

33.7

---

301

---

318

44

65.8

106

31

48.4

---

---

75.6

51.3

32.5

---

294

---

310

43

65.3

105

30

47.7

---

---

75.0

50.4

31.3

---

286

---

302

42

64.7

104

29

47.0

---

---

74.5

49.5

30.1

---

279

---

294

41

64.3

104

28

46.1

---

---

73.9

48.6

28.9

---

271

---

286

41

63.8

103

27

45.2

---

---

73.3

47.7

27.8

---

264

---

279

40

63.3

103

26

44.6

---

---

72.8

46.8

26.7

---

258

---

272

39

62.8

102

25

43.8

---

---

72.2

45.9

25.5

---

253

---

266

38

62.4

101

24

43.1

---

---

71.6

45.0

24.3

---

247

---

260

37

62.0

100

23

42.1

---

---

71.0

44.0

23.1

82.0

240

201

254

36

61.5

99

22

41.6

---

---

70.5

43.2

22.0

81.5

234

195

248

35

61.0

98

21

40.9

---

---

69.9

42.3

20.7

81.0

228

189

243

35

60.5

97

20

40.1

---

---

69.4

41.5

19.6

80.5

222

184

238

34

59.0

96

18

---

---

---

---

---

---

80.0

216

179

230

33

58.0

95

16

---

---

---

---

---

---

79.0

210

175

222

32

57.5

94

15

---

---

---

---

---

---

78.5

205

171

213

31

57.0

93

13

---

---

---

---

---

---

78.0

200

167

208

30

56.5

92

12

---

---

---

---

---

---

77.5

195

163

204

29

56.0

91

10

---

---

---

---

---

---

77.0

190

160

196

28

55.5

90

9

---

---

---

---

---

---

76.0

185

157

192

27

55.0

89

8

---

---

---

---

---

---

75.5

180

154

188

26

54.0

88

7

---

---

---

---

---

---

75.0

176

151

184

26

53.5

87

6

---

---

---

---

---

---

74.5

172

148

180

26

53.0

86

5

---

---

---

---

---

---

74.0

169

145

176

25

52.5

85

4

---

---

---

---

---

---

73.5

165

142

173

25

52.0

84

3

---

---

---

---

---

---

73.0

162

140

170

25

51.0

83

2

---

---

---

---

---

---

72.0

159

137

166

24

50.5

82

1

---

---

---

---

---

---

71.5

156

135

163

24

50.0

81

0

---

---

---

---

---

---

71.0

153

133

160

24

49.5

80

---

---

---

---

---

---

---

70.0

150

130

---

---

49.0

79

---

---

---

---

---

---

---

69.5

147

128

---

---

48.5

78

---

---

---

---

---

---

---

69.0

144

126

---

---

48.0

77

---

---

---

---

---

---

---

68.0

141

124

---

---

47.0

76

---

---

---

---

---

---

---

67.5

139

122

---

---

46.5

75

---

---

---

99.5

---

---

---

67.0

137

120

---

---

46.0

74

---

---

---

99.0

---

---

---

66.0

135

118

---

---

45.5

73

---

---

---

98.5

---

---

---

65.5

132

116

---

---

45.0

72

---

---

---

98.0

---

---

---

65.0

130

114

---

---

44.5

71

---

---

100.0

97.5

---

---

---

64.2

127

112

---

---

44.0

70

---

---

99.5

97.0

---

---

---

63.5

125

110

---

---

43.5

69

---

---

99.0

96.0

---

---

---

62.8

123

109

---

---

43.0

68

---

---

98.0

95.5

---

---

---

62.0

121

107

---

---

42.5

67

---

---

97.5

95.0

---

---

---

61.4

119

106

---

---

42.0

66

---

---

97.0

94.5

---

---

---

60.5

117

104

---

---

41.8

65

---

---

96.0

94.0

---

---

---

60.1

116

102

---

---

41.5

64

---

---

95.5

93.5

---

---

---

59.5

114

101

---

---

41.0

63

---

---

95.0

93.0

---

---

---

58.7

112

99

---

---

40.5

62

---

---

94.5

92.0

---

---

---

58.0

110

98

---

---

40.0

61

---

---

93.5

91.5

---

---

---

57.3

108

96

---

---

39.5

60

---

---

93.0

91.0

---

---

---

56.5

107

95

---

---

39.0

59

---

---

92.5

90.5

---

---

---

55.9

106

94

---

---

38.5

58

---

---

92.0

90.0

---

---

---

55.0

104

92

---

---

38.0

57

---

---

91.0

89.5

---

---

---

54.6

102

91

---

---

37.8

56

---

---

90.5

89.0

---

---

---

54.0

101

90

---

---

37.5

55

---

---

90.0

88.0

---

---

---

53.2

99

89

---

---

37.0

54

---

---

89.5

87.5

---

---

---

52.5

---

87

---

---

36.5

53

---

---

89.0

87.0

---

---

---

51.8

---

86

---

---

36.0

52

---

---

88.0

86.5

---

---

---

51.0

---

85

---

---

35.5

51

---

---

87.5

86.0

---

---

---

50.4

---

84

---

---

35.0

50

---

---

87.0

85.5

---

---

---

49.5

---

83

---

---

34.8

49

---

---

86.5

85.0

---

---

---

49.1

---

82

---

---

34.5

48

---

---

85.5

84.5

---

---

---

48.5

---

81

---

---

34.0

47

---

---

85.0

84.0

---

---

---

47.7

---

80

---

---

33.5

46

---

---

84.5

83.0

---

---

---

47.0

---

79

---

---

33.0

45

---

---

84.0

82.5

---

---

---

46.2

---

79

---

---

32.5

44

---

---

83.5

82.0

---

---

---

45.5

---

78

---

---

32.0

43

---

---

82.5

81.5

---

---

---

44.8

---

77

---

---

31.5

42

---

---

82.0

81.0

---

---

---

44.0

---

76

---

---

31.0

41

---

---

81.5

80.5

---

---

---

43.4

---

75

---

---

30.8

40

---

---

81.0

79.5

---

---

---

43.0

---

74

---

---

30.5

39

---

---

80.0

79.0

---

---

---

42.1

---

74

---

---

30.0

38

---

---

79.5

78.5

---

---

---

41.5

---

73

---

---

29.5

37

---

---

79.0

78.0

---

---

---

40.7

---

72

---

---

29.0

36

---

---

78.5

77.5

---

---

---

40.0

---

71

---

---

28.5

35

---

---

78.0

77.0

---

---

---

39.3

---

71

---

---

28.0

34

---

---

77.0

76.5

---

---

---

38.5

---

70

---

---

27.8

33

---

---

76.5

75.5

---

---

---

37.9

---

69

---

---

27.5

32

---

---

76.0

75.0

---

---

---

37.5

---

68

---

---

27.0

31

---

---

75.5

74.5

---

---

---

36.6

---

68

---

---

26.5

30

---

---

75.0

74.0

---

---

---

36.0

---

67

---

---

26.0

29

---

---

74.0

73.5

---

---

---

35.2

---

66

---

---

25.5

28

---

---

73.5

73.0

---

---

---

34.5

---

66

---

---

25.0

27

---

---

73.0

72.5

---

---

---

33.8

---

65

---

---

24.5

26

---

---

72.5

72.0

---

---

---

33.1

---

65

---

---

24.2

25

---

---

72.0

71.0

---

---

---

32.4

---

64

---

---

24.0

24

---

---

71.0

70.5

---

---

---

32.0

---

64

---

---

23.5

23

---

---

70.5

70.0

---

---

---

31.1

---

63

---

---

23.0

22

---

---

70.0

69.5

---

---

---

30.4

---

63

---

---

22.5

21

---

---

69.5

69.0

---

---

---

29.7

---

62

---

---

22.0

20

---

---

68.5

68.5

---

---

---

29.0

---

62

---

---

21.5

19

---

---

68.0

68.0

---

---

---

28.1

---

61

---

---

21.2

18

---

---

67.5

67.0

---

---

---

27.4

---

61

---

---

21.0

17

---

---

67.0

66.5

---

---

---

26.7

---

60

---

---

20.5

16

---

---

66.5

66.0

---

---

---

26.0

---

60

---

---

20.0

15

---

---

65.5

65.5

---

---

---

25.3

---

59

---

---

---

14

---

---

65.0

65.0

---

---

---

24.6

---

59

---

---

---

13

---

---

64.5

64.5

---

---

---

23.9

---

58

---

---

---

12

---

---

64.0

64.0

---

---

---

23.5

---

58

---

---

---

11

---

---

63.5

63.5

---

---

---

22.6

---

57

---

---

---

10

---

---

62.5

63.0

---

---

---

21.9

---

57

---

---

---

9

---

---

62.0

62.0

---

---

---

21.2

---

56

---

---

---

8

---

---

61.5

61.5

---

---

---

20.5

---

56

---

---

---

7

---

---

61.0

61.0

---

---

---

19.8

---

56

---

---

---

6

---

---

60.5

60.5

---

---

---

19.1

---

55

---

---

---

5

---

---

60.0

60.0

---

---

---

18.4

---

55

---

---

---

4

---

---

59.0

59.5

---

---

---

18.0

---

55

---

---

---

3

---

---

58.5

59.0

---

---

---

17.1

---

54

---

---

---

2

---

---

58.0

58.0

---

---

---

16.4

---

54

---

---

---

1

---

---

57.5

57.5

---

---

---

15.7

---

53

---

---

---

0

---

---

57.0

57.0

---

---

---

15.0

---

53

---

---

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