維克式

洛   式

洛式表面硬度

蕭式

硬度

勃式硬度

引張

強度

(近似値)

HV

HRA

HRB

HRC

HRD

15-N

30-N

45-N

HS

HB10mm球/3000kgf

MPa

50kgf

60kgf

B1/16''鉢

150kgf

100kgf

15kgf

30kgf

45kgf

標準球

碳化

鎢球

100kgf

940

85.6

-

68

76.9

93.2

84.4

75.4

98

-

-

-

900

85

-

67

76.1

92.9

83.6

74.2

95.6

-

-

-

865

84.5

-

66

75.4

92.5

82.8

73.3

93.4

-

-

-

832

83.9

-

65

74.5

92.2

81.9

72

91.2

-

(739)

-

800

83.4

-

64

73.8

91.8

81.1

71

89

-

(722)

-

772

82.8

-

63

73

91.4

80.1

69.9

87.1

-

(705)

-

746

82.3

-

62

72.2

91.1

79.3

68.8

85.2

-

(688)

-

720

81.8

-

61

71.5

90.7

78.4

67.7

83.3

-

(670)

-

697

81.2

-

60

70.7

90.2

77.5

66.6

81.5

-

(654)

-

-

674

80.7

-

59

69.9

89.8

76.6

65.5

79.7

-

(634)

-

653

80.1

-

58

69.2

89.3

75.7

64.3

78.1

-

615

-

633

79.6

-

57

68.5

88.9

74.8

63.2

76.4

-

595

-

-

613

79

-

56

67.7

88.3

73.9

62

74.8

-

577

-

595

78.5

-

55

66.9

87.9

73

60.9

73.2

-

560

2075

577

78

-

54

66.1

87.4

72

59.8

71.7

-

543

2015

-

560

77.4

-

53

65.4

86.9

71.2

58.6

70.2

-

525

1950

-

544

76.8

-

52

64.6

86.4

70.2

57.4

68.8

(500)

512

1880

528

76.3

-

51

63.8

85.9

69.4

56.1

67.3

(487)

496

1820

513

75.9

-

50

63.1

85.5

68.5

55

65.9

(475)

481

1760

498

75.2

-

49

62.1

85

67.6

53.8

64.5

(464)

469

1695

484

74.7

-

48

61.4

84.5

66.7

52.5

63.1

451

455

1635

471

74.1

-

47

60.8

83.9

65.8

51.4

61.9

442

443

1580

458

73.6

-

46

60

83.5

64.8

50.3

60.6

432

432

1530

446

73.1

-

45

59.2

83

64

49

59.4

421

421

1480

434

72.5

-

44

58.5

82.5

63.1

47.8

58.2

409

409

1435

423

72

-

43

57.7

82

62.2

46.7

57.1

400

400

1385

412

71.5

-

42

56.9

81.5

61.3

45.5

55.9

390

390

1340

402

70.9

-

41

56.2

80.9

60.4

44.3

54.9

381

381

1295

392

70.4

-

40

55.4

80.4

59.5

43.1

53.8

371

371

1250

382

69.9

-

39

54.6

79.9

58.6

41.9

52.7

362

362

1215

372

69.4

-

38

53.8

79.4

57.7

40.8

51.6

353

353

1180

363

68.9

-

37

53.1

78.8

56.8

39.6

50.6

344

344

1160

354

68.4

(109.0)

36

52.3

78.3

55.9

38.4

49.6

336

336

1115

345

67.9

(108.5)

35

51.5

77.7

55

37.2

48.6

327

327

1080

336

67.4

(108.0)

34

50.8

77.2

54.2

36.1

47.6

319

319

1055

327

66.8

(107.5)

33

50

76.6

53.3

34.9

46.6

311

311

1025

318

66.3

(107.0)

32

49.2

76.1

52.1

33.7

45.5

301

301

1000

310

65.8

(106.0)

31

48.4

75.6

51.3

32.5

44.6

294

294

980

302

65.3

(105.5)

30

47.7

75

50.4

31.3

43.6

286

286

950

294

64.7

(104.5)

29

47

74.5

49.5

30.1

42.7

279

279

930

286

64.3

(104.0)

28

46.1

73.9

48.6

28.9

41.7

271

271

910

279

63.8

(103.0)

27

45.2

73.3

47.7

27.8

40.9

264

264

880

272

63.3

(102.5)

26

44.6

72.8

46.8

26.7

40

258

258

860

266

62.8

(101.5)

25

43.8

72.2

45.9

25.5

39.3

253

253

840

260

62.4

(101.0)

24

43.1

71.6

45

24.3

38.5

247

247

825

254

62

100

23

42.1

71

44

23.1

37.7

243

243

805

248

61.5

99

22

41.6

70.5

43.2

22

37

237

237

785

243

61

98.5

21

40.9

69.9

42.3

20.7

36.4

231

231

770

238

60.5

97.8

20

40.1

69.4

41.5

19.6

35.7

226

226

760

230

-

96.7

(18)

-

-

-

-

34.7

219

219

730

222

-

95.5

(16)

-

-

-

-

33.6

212

212

705

213

-

93.9

(14)

-

-

-

-

32.4

203

203

675

204

-

92.3

(12)

-

-

-

-

31.2

194

194

650

196

-

90.7

(10)

-

-

-

-

30.2

187

187

620

188

-

89.5

(8)

-

-

-

-

28

179

179

600

180

-

87.1

(6)

-

-

-

-

26

171

171

580

173

-

85.5

(4)

-

-

-

-

25

165

165

550

166

-

83.5

(2)

-

-

-

-

-

158

158

530

160

-

81.7

0

-

-

-

-

24

152

152

515

150

-

78.7

-

-

-

-

-

22

143

143

490

140

-

75

-

-

-

-

-

21

133

133

455

130

-

71.2

-

-

-

-

-

20

124

124

425

120

-

66.7

-

-

-

-

-

-

114

114

390