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Hardness Conversion Calculator ASTM E140 Brinell Vickers Rockwell Knoop Scleroscope






Hardness Values Conversion Calculator

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


From
To
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

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


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