Tensile
Strength
(N/mm2)

Hardness
Vickers

Hardness
Brinell*

HRB

HRF

HRA

HRC

Specifications

770

240

228

98.1

114.3

60.7

20.3

785

245

233

61.2

21.3

800

250

238

99.5

115.1

61.6

22.2

820

265

242

62.0

23.1

835

260

247

(101)

62.4

24.0

850

265

252

62.7

25.8

410/416

865

270

257

(102)

63.1

25.8

410/416

880

275

261

63.5

26.4

900

208

266

(104)

63.8

27.1

915

285

271

64.2

27.8

930

290

276

(105)

64.5

28.5

950

295

280

64.8

29.2

965

300

285

65.2

29.8

995

310

295

65.8

31.0

1030

320

304

66.4

32.2

1060

330

314

67.0

33.3

1095

340

323

67.6

34.4

1125

350

333

68.1

35.5

1155

360

342

68.7

36.6

S-monel

1190

370

352

69.2

37.7

1220

380

361

69.8

38.8

K-monel

1225

390

371

70.3

39.8

1290

400

380

70.8

40.8

 Beryllium Copper

1320

410

390

71.4

41.8

1350

420

399

71.8

42.7

1385

430

409

72.3

43.6

1420

440

418

72.8

44.5

1455

450

428

73.3

45.3

1485

460

437

73.6

46.1

1520

470

447

74.1

46.9

1555

480

(456)

74.5

47.7

1595

490

(466)

74.8

48.4

Satellite

1630

500

(475)

75.3

49.1

1665

510

(485)

75.7

49.8

1700

520

(494)

76.1

50.5

1740

530

(504)

76.4

51.1

1775

540

(513)

76.7

51.7

1810

550

(523)

77.0

52.3

420

1845

560

(532)

77.4

53.0

1880

570

(542)

77.8

53.6

1920

580

(551)

78.0

54.1

 420C

1955

590

(561)

78.4

54.7

 420C

1995

600

(570)

78.6

55.2

440B,  S2, 420C

2030

610

(580)

78.9

55.7

 440B,  S2, 420C

2070

620

(589)

79.2

56.3

  S2, 420C

2105

630

(599)

79.5

56.5

  S2, 420C

2145

640

(608)

79.8

57.3

 S2, 420C

2180

650

(618)

80.0

57.8

 S2, 420C

660

80.3

58.3

440C, Carbon,   S2, 420C

670

80.6

58.8

440C, Carbon,   S2, 420C

680

80.8

59.2

440C, Carbon,   S2, 420C

690

81.1

59.7

440C, Carbon,  S2, 420C

700

81.3

60.1

SAE 52100, 440C, Carbon, S2, 420C

720

81.8

61.0

SAE 52100, 440C, Carbon, S2

740

82.2

61.8

SAE 52100, 440C, Carbon, S2

760

82.6

62.5

SAE 52100, 440C, Carbon

780

83.0

63.3

SAE 52100

800

83.4

64.0

SAE 52100

820

83.8

64.7

SAE 52100

840

84.1

65.3

SAE 52100

860

84.4

65.9

SAE 52100