HB
Brinell Hardness

10mm load 3000kg Standard ball

HRC
Rockwell Hardness

C Scale load 150kgf Diamond Penetrator

HV
Vickers Hardness

HS
Shore Hardness

Tensile Strength

N/mm2 (kgf/mm2)
Approximate value

-

52.5

553

-

1912 (195)

-

52.1

547

70

1893 (193)

495

51.6

539

-

1853 (189)

-

51.1

530

-

1824 (186)

-

51.0

528

68

1824 (186)

477

50.3

516

-

1775 (181)

-

49.6

508

66

1736 (177)

461

48.8

495

-

1687 (172)

-

48.5

491

65

1667 (170)

444

47.2

474

-

1589 (162)

-

47.1

472

63

1589 (162)

429

45.7

455

61

1510 (154)

415

44.5

440

59

1461 (149)

401

43.1

425

58

1393 (142)

388

41.8

410

56

1334 (136)

375

40.4

396

54

1265 (129)

363

39.1

383

52

1216 (124)

352

37.9

372

51

1177 (120)

341

36.6

360

50

1128 (115)

331

35.5

350

48

1098 (112)

321

34.3

339

47

1059 (108)

311

33.1

328

46

1030 (105)

302

32.1

319

45

1010 (103)

293

30.9

309

43

971 (99)

285

29.9

301

-

951 (97)

277

28.8

292

41

922 (94)

269

27.6

284

40

892 (91)

262

26.6

276

39

873 (89)

255

25.4

269

38

843 (86)

248

24.2

261

37

824 (84)

241

22.8

253

36

804 (82)

235

21.7

247

35

785 (80)

229

20.5

241

34

765 (78)

223

(18.8)

234

-

-

217

(17.5)

228

33

726 (74)

212

(16.0)

222

-

706 (72)

207

(15.2)

218

32

686 (70)

201

(13.8)

212

31

677 (69)

197

(12.7)

207

30

657 (67)

192

(11.5)

202

29

637 (65)

187

(10.0)

196

-

618 (63)

183

(9.0)

192

28

618 (63)

179

(8.0)

188

27

598 (61)

174

(6.4)

182

-

588 (60)

170

(5.4)

178

26

569 (58)

167

(4.4)

175

-

559 (57)

163

(3.3)

171

25

549 (56)

156

(0.9)

163

-

520 (53)

149

-

156

23

500 (51)

143

-

150

22

490 (50)

137

-

143

21

461 (47)

131

-

137

-

451 (46)

126

-

132

20

431 (44)

121

-

127

19

412 (42)

116

-

122

18

402 (41)

111

-

117

15

382 (39)