HRA HRC硬度对照表

BrineBrinell

ll

Rockwell Hardness

Rockwell

ApproximaSuperficial

te

Hardness

Indentati3000 RockweRockweRockweRockwe Tensile

on kgf ll A ll B ll C ll D

15 30 45

Diameter 10 mm 60 kgf 100 kgf 150 kgf1 00 kgf Strength

kgf kgf kgf

1/161/161/16VickeDiamon1//16" DiamonDiamonmm Ball " " " ksi (MPa)

rs d ball d d

ball ball ball

HR15HR30HR45 HB HV HRA HRB HRC HRD

N N N

--- --- 940 85.6 --- 68.0 76.9 93.2 84.4 75.4 ---

--- --- 920 85.3 --- 67.5 76.5 93.0 84.0 74.8 ---

--- --- 900 85.0 --- 67.0 76.1 92.9 83.6 74.2 ---

--- 767 880 84.7 --- 66.4 75.7 92.7 83.1 73.6 ---

--- 757 860 84.4 --- 65.9 75.3 92.5 82.7 73.1 ---

2.25 745 840 84.1 --- 65.3 74.8 92.3 82.2 72.2 ---

--- 733 820 83.8 --- 64.7 74.3 92.1 81.7 71.8 ---

--- 722 800 83.4 --- 64.0 73.8 91.8 81.1 71.0 ---

2.30 712 --- --- --- --- --- --- --- --- ---

--- 710 780 83.0 --- 63.3 73.3 91.5 80.4 70.2 ---

--- 698 760 82.6 --- 62.5 72.6 91.2 79.7 69.4 ---

--- 684 740 82.2 --- 61.8 72.1 91.0 79.1 68. ---

2.35 682 737 82.2 --- 61.7 72.0 91.0 79.0 68.5 ---

--- 670 720 81.8 --- 61.0 71.5 90.7 78.4 67.7 ---

--- 656 700 81.3 --- 60.1 70.8 90.3 77.6 66.7 ---

2.40 653 697 81.2 --- 60.0 70.7 90.2 77.5 66.5 ---

--- 647 690 81.1 --- 59.7 70.5 90.1 77.2 66.2 ---

--- 638 680 80.8 --- 59.2 70.1 89.8 76.8 65.7 ---

--- 630 670 80.6 --- 58.8 69.8 89.7 76.4 65.3 ---

2.45 627 667 80.5 --- 58.7 69.7 89.6 76.3 65.1 ---

--- 677 80.7 --- 59.1 70.0 89.8 76.8 65.7 ---

2.50

601 640 79.8 --- 57.3 68.7 89.0 75.1 63.5 ---

Rockwell

BrineApproximaBrinell Rockwell Hardness Superficial

ll te

Hardness

Indentati3000 RockweRockweRockweRockwe Tensile

on kgf ll A ll B ll C ll D

Diameter 10 mm 60 kgf 100 kgf 150 kgf1 00 kgf 15 30 45 Strength

kgf kgf kgf

1/161/161/16VickeDiamon1//16" DiamonDiamonmm Ball " " " ksi (MPa)

rs d ball d d

ball ball ball

HR15HR30HR45 HB HV HRA HRB HRC HRD

N N N

--- 640 79.8 --- 57.3 68.7 89.0 75.1 63.5 ---

2.55

578 615 79.1 --- 56.0 67.7 88.4 73.9 62.1 ---

--- 607 78.8 --- 55.6 67.4 88.1 73.5 61.6 ---

2.60

555 591 78.4 --- 54.7 66.7 87.8 72.7 60.6 2055

--- 579 78.0 --- 54.0 66.1 87.5 72.0 59.8 2015

2.65

534 569 77.8 --- 53.5 65.8 87.2 71.6 59.2 1985

--- 553 77.1 --- 52.5 65.0 86.7 70.7 58.0 1915

2.70

514 547 76.9 --- 52.1 64.7 86.5 70.3 57.6 1890

--- 539 76.7 --- 51.6 64.3 86.3 69.9 56.9 1855

2.75 --- 530 76.4 --- 51.1 63.9 86.0 69.5 56.2 1825

495 528 76.3 --- 51.0 63.8 85.9 69.4 56.1 1820

--- 516 75.9 --- 50.3 63.2 85.6 68.7 55.2 1780

2.80

477 508 75.6 --- 49.6 62.7 85.3 68.2 54.5 1740

--- 495 75.1 --- 48.8 61.9 84.9 67.4 53.5 1680

2.85

461 491 74.9 --- 48.5 61.7 84.7 67.2 53.2 1670

--- 474 74.3 --- 47.2 61.0 84.1 66.0 51.7 1595

2.90

444 472 74.2 --- 47.1 60.8 84.0 65.8 51.5 1585

Rockwell

BrineApproximaBrinell Rockwell Hardness Superficial

ll te

Hardness

Indentati3000 RockweRockweRockweRockwe Tensile

on kgf ll A ll B ll C ll D

15 30 45

Diameter 10 mm 60 kgf 100 kgf 150 kgf1 00 kgf Strength

kgf kgf kgf

1/161/161/16VickeDiamon1//16" DiamonDiamonmm Ball " " " ksi (MPa)

rs d ball d d

ball ball ball

HR15HR30HR45 HB HV HRA HRB HRC HRD

N N N

2.95

3.00

3.05

3.10

3.15

3.20

3.25

3.30

3.35

3.40

3.45

3.50

3.55

3.60

3.65

3.70

3.75

3.80

429

415

401

388

375

363

455

440

425

410

396

383

73.4

72.8

72.0

71.4

70.6

70.0

352 372 69.3

341 360 68.7

331 350 68.1

321 339 67.5

311 328 66.9

302 319 66.3

293 309 65.7

285 301 65.3

277 292 64.6

269 284 64.1

262 276 63.6

255 269 63.0

---

---

---

---

---

---

(110.0)

(109.0)

(108.5)

(108.0)

(107.5)

(107.0)

(106.0)

(105.5)

(104.5)

(104.0)

(103.0)

(102.0)

45.7

44.5

43.1

41.8

40.4

39.1

59.7 83.4 64.6 49.9

58.8 82.8 63.5 48.4

57.8 82.0 62.3 46.9

56.8 81.4 61.1 45.3

55.7 80.6 59.9 43.6

54.6 80.0 58.7 42.0

1510

1460

1390

1330

1270

1220

37.9 53.8 79.3 57.6 40.5 1180

36.6 52.8 78.6 56.4 39.1 1130

35.5 51.9 78.0 55.4 37.8 1095

34.3 51.0 77.3 54.3 36.4 1060

33.1 50.0 76.7 53.3 34.4 1025

32.1 49.3 76.1 52.2 33.8 1005

30.9 48.3 75.5 51.2 32.4

970

950

925

895

875

850

29.9 47.6 75.0 50.3 31.2

28.8 46.7 74.4 49.3 29.9

27.6 45.9 73.7 48.3 28.5

26.6 45.0 73.1 47.3 27.3

25.4 44.2 72.5 46.2 26.0

BrineBrinell

ll

Rockwell Hardness

Rockwell

ApproximaSuperficial

te

Hardness

Indentati3000 RockweRockweRockweRockwe Tensile

on kgf ll A ll B ll C ll D

15 30 45

Diameter 10 mm 60 kgf 100 kgf 150 kgf1 00 kgf Strength

kgf kgf kgf

1/161/161/16VickeDiamon1//16" DiamonDiamonmm Ball " " " ksi (MPa)

rs d ball d d

ball ball ball

HB HV HRA HRB HRC HRD HR15HR30HR45

N

3.85

3.90

3.95

4.00

4.05

4.10

4.15

4.20

4.25

4.30

4.35

4.40

4.45

4.50

4.55

4.60

4.65

4.70

4.80

4.90

Brinell

248 261 62.5

241

235

229

223

217

212

207

201

197

192

187

183

179

174

170

167

163

156

149

Brinell

253 61.8

247 61.4

241 60.8

234

228 ---

222 ---

218 ---

212 ---

207 ---

202 ---

196 ---

192 ---

188 ---

182 ---

178 ---

175 ---

171 ---

163 ---

156 ---

(101.024.2

)

100.0 22.8

99.0 21.7

98.2 20.5

97.3 (18.8)

96.4 (17.5)

95.5 (16.0)

94.6 (15.2)

93.8 (13.8)

92.8 (12.7)

91.9 (11.5)

90.7 (10.0)

90.0 (9.0)

89.0 (8.0)

87.8 (6.4)

86.8 (5.4)

86.0 (4.4)

85.0 (3.3)

82.9 (0.9)

80.8 ---

N N

825 43.2 71.7 45.1 24.5

Indentati3000

on kgf

Diameter 10 mm

mm

5.00

5.10

5.20

5.30

5.40

5.50

Ball

HB

143

137

131

126

121

116

Vickers

HV

150

143

137

132

127

122

42.0 70.9 43.9 22.8 800

41.4 70.3 42.9 21.5 785

40.5 69.7 41.9 20.1 765

--- --- --- --- ---

--- --- --- --- 725

--- --- --- --- 705

--- --- --- --- 690

--- --- --- --- 675

--- --- --- --- 655

--- --- --- --- 640

--- --- --- --- 620

--- --- --- --- 615

--- --- --- --- 600

--- --- --- --- 585

--- --- --- --- 570

--- --- --- --- 560

--- --- --- --- 545

--- --- --- --- 525

--- --- --- --- 505

Rockwell

ApproximaRockwell Hardness Superficial

te

Hardness

RockweRockweRockweRockwe Tensile

ll A ll B ll C ll D

15 30 45

60 kgf 100 kgf 150 kgf1 00 kgf Strength

kgf kgf kgf

1/161/161/16Diamon1//16" DiamonDiamon" " " ksi (MPa)

d ball d d

ball ball ball

HR15HR30HR45HRA HRB HRC HRD

N N N

--- 78.7 --- --- --- --- --- 490

--- 76.4 --- --- --- --- --- 460

--- 74.0 --- --- --- --- --- 450

--- 72.0 --- --- --- --- --- 435

--- 69.8 --- --- --- --- --- 415

--- 67.6 --- --- --- --- --- 400

5.60 111 117 --- 65.7

硬度换算表 (以 HRC 硬度为基准)

---

--- --- --- ---

385

Rockwell

Brine Rockwell Hardness Superficial

ll

Hardness

Rockwe3000 RockweRockweRockweApproximRockwe

ll C kgf ll A ll B ll D ate ll C

15 30 45

150 kgf Vickers 10 mm 60 kgf 100 kgf 100 kgf Tensile 150 kgf

kgf kgf kgf

1/161/161/16DiamonDiamon1//16" DiamonDiamonHardness Ball " " " Strength

d d ball d d

ball ball ball

HR15HR30HR45HRC HV HB HRA HRB HRD ksi (MPa) HRC

N N N

68 940 --- 85.6 --- 76.9 93.2 84.4 75.4 --- 68

67 900 --- 85.0 --- 76.1 92.9 83.6 74.2 --- 67

66 865 --- 84.5 --- 75.4 92.5 82.8 73.3 --- 66

65 832 739 83.9 --- 74.5 92.2 81.9 72.0 --- 65

64 800 722 83.4 --- 73.8 91.8 81.1 71.0 --- 64

63 772 705 82.8 --- 73.0 91.4 80.1 69.9 --- 63

62 746 688 82.3 --- 72.2 91.1 79.3 68.8 --- 62

61 720 670 81.8 --- 71.5 90.7 78.4 67.7 --- 61

60 697 654 81.2 --- 70.7 90.2 77.5 66.6 --- 60

59 674 634 80.7 --- 69.9 89.8 76.6 65.5 --- 59

58 653 615 80.1 --- 69.2 89.3 75.7 64.3 --- 58

57 633 595 79.6 --- 68.5 88.9 74.8 63.2 --- 57

56 613 577 79.0 --- 67.7 88.3 73.9 62.0 --- 56

55 595 560 78.5 --- 66.9 87.9 73.0 60.9 2075 55

54 577 543 78.0 --- 66.1 87.4 72.0 59.8 2015 54

53 560 525 77.4 --- 65.4 86.9 71.2 58.6 1950 53

52 544 512 76.8 --- 64.6 86.4 70.2 57.4 1880 52

51 528 496 76.3 --- 63.8 85.9 69.4 56.1 1820 51

50 513 481 75.9 --- 63.1 85.5 68.5 55.0 1760 50

49 498 469 75.2 --- 62.1 85.0 67.6 53.8 1695 49

Rockwell

Brine Rockwell Hardness Superficial

ll

Hardness

Rockwe 3000 RockweRockweRockwel ApproximRockwe

ll C kgf ll A ll B

l D

ate ll C

15 30 45

150 kgf Vickers 10 mm 60 kgf 100 kgf 100 kgf Tensile 150 kgf

kgf kgf kgf

1/161/161/16DiamonDiamon1//16" DiamonDiamonHardness Ball " " " Strength

d d ball d d

ball ball ball

HR15HR30HR45HRC HV HB HRA HRB HRD ksi (MPa) HRC

N N N

48 484 455 74.7 --- 61.4 84.5 66.7 52.5 1635 48

47 471 443 74.1 --- 60.8 83.9 65.8 51.4 1580 47

46 458 432 73.6 --- 60.0 83.5 64.8 50.3 1530 46

45 446 421 73.1 --- 59.2 83.0 64.0 49.0 1480 45

44 434 409 72.5 --- 58.5 82.5 63.1 47.8 1435 44

43 423 400 72.0 --- 57.7 82.0 62.2 46.7 1385 43

42 412 390 71.5 --- 56.9 81.5 61.3 45.5 1340 42

41 402 381 70.9 --- 56.2 80.9 60.4 44.3 1295 41

40 392 371 70.4 --- 55.4 80.4 59.5 43.1 1250 40

39 382 362 69.9 --- 54.6 79.9 58.6 41.9 1215 39

38 372 353 69.4 --- 53.8 79.4 57.7 40.8 1180 38

37 363 344 68.9 --- 53.1 78.8 56.8 39.6 1160 37

(109.036 354 336 68.4 52.3 78.3 55.9 38.4 1115 36

)

(108.535 345 327 67.9 51,5 77.7 55.0 37.2 1080 35

)

(108.034 336 319 67.4 50.8 77.2 54.2 36.1 1055 34

)

(107.533 327 311 66.8 50.0 76.6 53.3 34.9 1025 33

)

(107.032 318 301 66.3 49.2 76.1 52.1 33.7 1000 32

)

(106.031 310 294 65.8 48.4 75.6 51.3 32.5 980 31

)

(105.530 302 286 65.3 47.7 75.0 50.4 31.3 950 30

)

(104.529 294 279 64.7 47.0 74.5 49.5 30.1 930 29

)

Rockwell

Brine Rockwell Hardness Superficial

ll

Hardness

Rockwe3000 RockweRockweRockweApproximRockwe286

ll C kgf ll A ll B ll D ate ll C

Vicke27915 30 45

150 kgf 10 mm 60 kgf 100 kgf 100 kgf Tensile 150 kgf

rs kgf kgf kgf

1/161/161/16DiamonHardnes2Diamon1//16" DiamonDiamonBall " " " Strength

d 72s d ball d d

ball ball ball

HR15HR30HR45HRC HV HB HRA HRB HRD ksi (MPa) HRC

N N N

(104.028 286 271 64.3 46.1 73.9 48.6 28.9 910 28

)

(103.027 279 264 63.8 45.2 73.3 47.7 27.8 880 27

)

(102.526 272 258 63.3 44.6 72.8 46.8 26.7 860 26

)

(101.525 266 253 62.8 43.8 72.2 45.9 25.5 840 25

)

(101.024 260 247 62.4 43.1 71.6 45.0 24.3 825 24

)

23 254 243 62.0 100.0 42.1 71.0 44.0 23.1 805 23

22 248 237 61.5 99.0 41.6 70.5 43.2 22.0 785 22

21 243 231 61.0 98.5 40.9 69.9 42.3 20.7 770 21

20 238 226 60.5 97.8 40.1 69.4 41.5 19.6 760 20

(18) 230 219 --- 96.7 --- --- --- --- 730 (18)

(16) 222 212 --- 95.5 --- --- --- --- 705 (16)

(14) 213 203 --- 93.9 --- --- --- --- 675 (14)

(12) 204 194 --- 92.3 --- --- --- --- 650 (12)

(10) 196 187 --- 90.7 --- --- --- --- 620 (10)

(8) 188 179 --- 89.5 --- --- --- --- 600 (8)

---

(6) 180 171 --- 87.1 --- --- --- --- 580 (6)

(4) 173 165 --- 85.5 --- --- --- --- 550 (4)

(2) 166 158 --- 83.5 --- --- --- --- 530 (2)

(0) 160 152 --- 81.7 --- --- --- --- 510 (0)

金属用ASTM E 140 硬度换算表

ASTM E140 标准硬度换算表, 用以金属的 Brinell

硬度, Vickers 硬度, Rockwell 硬度, Knoop 硬度,

表面硬度, 及 Scleroscope 硬度对照表

Approximate Hardness Conversion Numbers for Non-Austenitic Steels

(Rockwell C Hardness Range)

A, B

Brinell Rockwell Rockwell

Hardness Hardness Superficial

CNumber Number Hardness Number

Rockwell Knoop

C 10-mm 10-mm Hardness, 15-N 30-N 45-N

Hardness Vickers Standard Carbide Number A D Scale, Scale, Scale,

Number Hardness Ball, Ball, 500-gf Scale, Scale, 15-kgf 30-kgf 45-kgf Scleroscop150 kgf Number 3000-kgf 3000-kgf and 60-kgf 100-kgf (HR (HR (HR Hardness

(HRC) (HV) (HBS) (HBW) Over (HK) (HRA) (HRD) 15-N) 30-N) 45-N) Number

D

68 940 --- --- 920 85.6 76.9 93.2 84.4 75.4 97.3

67 900 --- --- 895 85.0 76.1 92.9 83.6 74.2 95.0

66 865 --- --- 870 84.5 75.4 92.5 82.8 73.3 92.7

65 832 --- (739) 846 83.9 74.5 92.2 81.9 72.0 90.6

64 800 --- (722) 822 83.4 73.8 91.8 81.1 71.0 88.5

63 772 --- (705) 799 82.8 73.0 91.4 80.1 69.9 86.5

62 746 --- (688) 776 82.3 72.2 91.1 79.3 68.8 84.5

61 720 --- (670) 754 81.8 71.5 90.7 78.4 67.7 82.6

60 697 --- (654) 732 81.2 70.7 90.2 77.5 66.6 80.8

59 674 --- 634 710 80.7 69.9 89.8 76.6 65.5 79.0

58 653 --- 615 690 80.1 69.2 89.3 75.7 64.3 77.3

57 633 --- 595 670 79.6 68.5 88.9 74.8 63.2 75.6

56 613 --- 577 650 79.0 67.7 88.3 73.9 62.0 74.0

55 595 --- 560 630 78.5 66.9 87.9 73.0 60.9 72.4

54 577 --- 543 612 78.0 66.1 87.4 72.0 59.8 70.9

53 560 --- 525 594 77.4 65.4 86.9 71.2 58.6 69.4

52 544 (500) 512 576 76.8 64.6 86.4 70.2 57.4 67.9

51 528 (487) 496 558 76.3 63.8 85.9 69.4 56.1 66.5

50 513 (475) 481 542 75.9 63.1 85.5 68.5 55.0 65.1

49 498 (464) 469 526 75.2 62.1 85.0 67.6 53.8 63.7

48 484 451 455 510 74.7 61.4 84.5 66.7 52.5 62.4

47 471 442 443 495 74.1 60.8 83.9 65.8 51.4 61.1

46 458 432 432 480 73.6 60.0 83.5 64.8 50.3 59.8

Rockwell Vickers Brinell Knoop Rockwell Rockwell ScleroscopC Hardness Hardness Hardness, Hardness Superficial Hardness

Hardness Number Number

C Number Number Hardness Number Number

D

Number (HV) 10-mm 10-mm 500-gf 15-N 30-N 45-N

150 kgf Standard Carbide and A D Scale, Scale, Scale,

(HRC) Ball, Ball, Over (HK) Scale, Scale, 15-kgf 30-kgf 45-kgf

3000-kgf 3000-kgf 60-kgf 100-kgf (HR (HR (HR

(HBS) (HBW) (HRA) (HRD) 15-N) 30-N) 45-N)

45 446 421 421 466 73.1 59.2 83.0 64.0 49.0 58.5

44 434 409 409 452 72.5 58.5 82.5 63.1 47.8 57.3

43 423 400 400 438 72.0 57.7 82.0 62.2 46.7 56.1

42 412 390 390 426 71.5 56.9 81.5 61.3 45.5 54.9

41 402 381 381 414 70.9 56.2 80.9 60.4 44.3 53.7

40 392 371 371 402 70.4 55.4 80.4 59.5 43.1 52.6

39 382 362 362 391 69.9 54.6 79.9 58.6 41.9 51.5

38 372 353 353 380 69.4 53.8 79.4 57.7 40.8 50.4

37 363 344 344 370 68.9 53.1 78.8 56.8 39.6 49.3

36 354 336 336 360 68.4 52.3 78.3 55.9 38.4 48.2

35 345 327 327 351 67.9 51.5 77.7 55.0 37.2 47.1

34 336 319 319 342 67.4 50.8 77.2 54.2 36.1 46.1

33 327 311 311 334 66.8 50.0 76.6 53.3 34.9 45.1

32 318 301 301 326 66.3 49.2 76.1 52.1 33.7 44.1

31 310 294 294 318 65.8 48.4 75.6 51.3 32.5 43.1

30 302 286 286 311 65.3 47.7 75.0 50.4 31.3 42.2

29 294 279 279 304 64.8 47.0 74.5 49.5 30.1 41.3

28 286 271 271 297 64.3 46.1 73.9 48.6 28.9 40.4

27 279 264 264 290 63.8 45.2 73.3 47.7 27.8 39.5

26 272 258 258 284 63.3 44.6 72.8 46.8 26.7 38.7

25 266 253 253 278 62.8 43.8 72.2 45.9 25.5 37.8

24 260 247 247 272 62.4 43.1 71.6 45.0 24.3 37.0

23 254 243 243 266 62.0 42.1 71.0 44.0 23.1 36.3

22 248 237 237 261 61.5 41.6 70.5 43.2 22.0 35.5

21 243 231 231 256 61.0 40.9 69.9 42.3 20.7 34.8

20 238 226 226 251 60.5 40.1 69.4 41.5 19.6 34.2

A In the table headings, force refers to total test forces.

B Appendix X1 contains equations converting determined hardness scale numbers to Rockwell

numbers for non-austenitic steels.

C The Brinell hardness numbers in parentheses are outside the range recommended for Brineltesting in 8.1 of Test Method E 10.

D These Scleroscope hardness conversions are based on Vickers—Scleroscope hardness reladeveloped from Vickers hardness data provided by the National Bureau of Standards forreference blocks, Scleroscope hardness values obtained on these blocks by the Shore Iand Mfg. Co., Inc., the Roll Manufacturers Institute, and members of this institute, a

hardness conversions previously published by the American Society for Metals and the

Manufacturers Institute.

Approximate Hardness Conversion Numbers for Non-Austenitic Steels

(Rockwell B Hardness Range)

A, B

Knoop Rockwell Superficial HardnessRockwell Rockwell Rockwell

Brinell Hardness

B Vickers A F

Hardness Number,

Hardness Hardness Hardness Hardness

15-T Scale, 30-T Scale, 4Number, 500-gf,

Number, Number Number, Number,

15-kgf, 30-kgf,

3000-kgf, and

100-kgf (HV) 60-kgf, 60-kgf,

(HR 15-T) (HR 30-T)

(HBS) Over

(HRB) (HRA) (HRF)

(HK)

100 240 240 251 61.5 --- 93.1 83.1

99 234 234 246 60.9 --- 92.8 82.5

98 228 228 241 60.2 --- 92.5 81.8

97 222 222 236 59.5 --- 92.1 81.1

96 216 216 231 58.9 --- 91.8 80.4

95 210 210 226 58.3 --- 91.5 79.8

94 205 205 221 57.6 --- 91.2 79.1

93 200 200 216 57.0 --- 90.8 78.4

92 195 195 211 56.4 --- 90.5 77.8

91 190 190 206 55.8 --- 90.2 77.1

90 185 185 201 55.2 --- 89.9 76.4

89 180 180 196 54.6 --- 89.5 75.8

88 176 176 192 54.0 --- 89.2 75.1

87 172 172 188 53.4 --- 88.9 74.4

86 169 169 184 52.8 --- 88.6 73.8

85 165 165 180 52.3 --- 88.2 73.1

84 162 162 176 51.7 --- 87.9 72.4

83 159 159 173 51.1 --- 87.6 71.8

82 156 156 170 50.6 --- 87.3 71.1

81 153 153 167 50.0 --- 86.9 70.4

80 150 150 164 49.5 --- 86.6 69.7

79 147 147 161 48.9 --- 86.3 69.1

Rockwell Knoop Rockwell Rockwell Rockwell Superficial HardnessBrinell

B Vickers Hardness A F

Hardness

Hardness Hardness Number, Hardness Hardness

15-T Scale, 30-T Scale, 4Number,

Number, Number 500-gf, Number, Number,

15-kgf, 30-kgf,

3000-kgf,

100-kgf (HV) and 60-kgf, 60-kgf,

(HR 15-T) (HR 30-T)

(HBS)

(HRB) Over (HRA) (HRF)

(HK)

78

77

76

75

74

73

72

71

70

69

68

67

66

65

64

63

62

61

60

59

58

57

56

55

54

144

141

139

137

135

132

130

127

125

123

121

119

117

116

114

112

110

108

107

106

104

103

101

100

---

144

141

139

137

135

132

130

127

125

123

121

119

117

116

114

112

110

108

107

106

104

103

101

100

---

158 48.4 --- 86.0 68.4

155 47.9 --- 85.6 67.7

152 47.3 --- 85.3 67.1

150 46.8 99.6 85.0 66.4

147 46.3 99.1 84.7 65.7

145 45.8 98.5 84.3 65.1

143 45.3 98.0 84.0 64.4

141 44.8 97.4 83.7 63.7

139 44.3 96.8 83.4 63.1

137 43.8 96.2 83.0 62.4

135 43.3 95.6 82.7 61.7

133 42.8 95.1 82.4 61.0

131 42.3 94.5 82.1 60.4

129 41.8 93.9 81.8 59.7

127 41.4 93.4 81.4 59.0

125 40.9 92.8 81.1 58.4

124 40.4 92.2 80.8 57.7

122 40.0 91.7 80.5 57.0

120 39.5 91.1 80.1 56.4

118 39.0 90.5 79.8 55.7

117 38.6 90.0 79.5 55.0

115 38.1 89.4 79.2 54.4

114 37.7 88.8 78.8 53.7

112 37.2 88.2 78.5 53.0

111 36.8 87.7 78.2 52.4

Knoop Rockwell Superficial HardnessRockwell Rockwell Rockwell

Brinell Hardness

B Vickers A F

Hardness Number,

Hardness Hardness Hardness Hardness

15-T Scale, 30-T Scale, 4Number, 500-gf,

Number, Number Number, Number,

15-kgf, 30-kgf,

3000-kgf, and

100-kgf (HV) 60-kgf, 60-kgf,

(HR 15-T) (HR 30-T)

(HBS) Over

(HRB) (HRA) (HRF)

(HK)

53 --- --- 110 36.3 87.1 77.9 51.7

52 --- --- 109 35.9 86.5 77.5 51.0

51 --- --- 108 35.5 86.0 77.2 50.3

50 --- --- 107 35.0 85.4 76.9 49.7

49 --- --- 106 34.6 84.8 76.6 49.0

48 --- --- 105 34.1 84.3 76.2 48.3

47 --- --- 104 33.7 83.7 75.9 47.7

46 --- --- 103 33.3 83.1 75.6 47.0

45 --- --- 102 32.9 82.6 75.3 46.3

44 --- --- 101 32.4 82.0 74.9 45.7

43 --- --- 100 32.0 81.4 74.6 45.0

42 --- --- 99 31.6 80.8 74.3 44.3

41 --- --- 98 31.2 80.3 74.0 43.7

40 --- --- 97 30.7 79.7 73.6 43.0

39 --- --- 96 30.3 79.1 73.3 42.3

38 --- --- 95 29.9 78.6 73.0 41.6

37 --- --- 94 29.5 78.0 72.7 41.0

36 --- --- 93 29.1 77.4 72.3 40.3

35 --- --- 92 28.7 76.9 72.0 39.6

34 --- --- 91 28.2 76.3 71.7 39.0

33 --- --- 90 27.8 75.7 71.4 38.3

32 --- --- 89 27.4 75.2 71.0 37.6

31 --- --- 88 27.0 74.6 70.7 37.0

30 --- --- 87 26.6 74.0 70.4 36.3

A In table headings, kgf refers to total test force.

B Appendix X2 contains equations converting determined hardness numbers to Rockwell Bnon-austenitic steels. Refer to 1.11 before using conversion equations.

Approximate Hardness Conversion Numbers for

Non-Austenitic Steels (Rockwell C Hardness Range)

Rockwell Hardness Brinell Hardness

Number, Number

B Scale (100-kgf, (3000-kgf, 10-mm

1⁄16-in. ball)

(1.588-mm) ball) (HRB) (HBS)

100 256

99 248

98 240

97 233

96 226

95 219

94 213

93

92

91

90

89

88

87

86

85

84

83

82

81

80

79

78

77

76

75

74

73

72

71

70

69

68

67

66

65

64

63

62

61

60

207

202

197

192

187

183

178

174

170

167

163

160

156

153

150

147

144

142

139

137

135

132

130

128

126

124

122

120

118

116

114

113

111

110

Approximate Rockwell Hardness Conversion Numbers for Austenitic

Stainless Steel Sheet

A,B

Rockwell Hardness Number Rockwell Superficial Hardness Number

15-N Scale, 30-N Scale, 45-N Scale,

C Scale, A Scale,

15-kgf, 30-kgf, 45-kgf,

150-kgf 60-kgf,

Superficial Superficial Superficial

Diamond Diamond

Diamond Diamond Diamond

Penetrator Penetrator

Penetrator Penetrator Penetrator

(HRC) (HRA)

(HR 15-N) (HR 30-N) (HR 45-N)

48 74.4 84.1 66.2 52.1

47 73.9 83.6 65.3 50.9

46 73.4 83.1 64.5 49.8

45 72.9 82.6 63.6 48.7

44 72.4 82.1 62.7 47.5

43

42

41

40

39

38

37

36

35

34

33

32

31

30

29

28

27

26

25

24

23

22

21

20

B Scale,

100-kgf,

1/16-in.

71.9

71.4

70.9

70.4

69.9

69.3

68.8

68.3

67.8

67.3

66.8

66.3

65.8

65.3

64.8

64.3

63.8

63.3

62.8

62.3

61.8

61.3

60.8

60.3

A Scale,

60-kgf,

Diamond

81.6

81.0

80.5

80.0

79.5

79.0

78.5

78

77.5

77.0

76.5

75.9

75.4

74.9

74.4

73.9

73.4

72.9

72.4

71.9

71.3

70.8

70.3

69.8

F Scale,

60-kgf,

1/16-in.

61.8

61.0

60.1

59.2

58.4

57.5

56.6

55.7

54.9

54.0

53.1

52.3

51.4

50.5

49.6

48.8

47.9

47.0

46.2

45.3

44.4

43.5

42.7

41.8

46.4

45.2

44.1

43.0

41.8

40.7

39.6

38.4

37.3

36.1

35.0

33.9

32.7

31.6

30.4

29.3

28.2

27.0

25.9

24.8

23.6

22.5

21.3

20.2

15-T Scale, 30-T Scale, 45-T Scale,

15-kgf, 30-kgf, 45-kgf,

1/16-in. 1/16-in. 1/16-in.

(1.588-mm)

Ball (HRB)

Penetrator (1.588-mm) (1.588-mm) (1.588-mm) (1.588-mm)

(HRA) Ball C (HRF) Ball (HR 15-T) Ball (HR 30-T) Ball (HR 45-T)

100 61.5 (113.9) 91.5 80.4

99 60.9 (113.2) 91.2 79.7

98 60.3 (112.5) 90.8 79.0

97 59.7 (111.8) 90.4 78.3

96 59.1 (111.1) 90.1 77.7

95 58.5 (110.5) 89.7 77.0

94 58.0 (109.8) 89.3 76.3

93 57.4 (109.1) 88.9 75.6

92 56.8 (108.4) 88.6 74.9

91 56.2 (107.8) 88.2 74.2

90 55.6 (107.1) 87.8 73.5

89 55.0 (106.4) 87.5 72.8

88 54.5 (105.7) 87.1 72.1

87 53.9 (105.0) 86.7 71.4

86 53.3 (104.4) 86.4 70.7

85 52.7 (103.7) 86.0 70.0

84 52.1 (103.0) 85.6 69.3

83 51.5 (102.3) 85.2 68.6

82 50.9 (101.7) 84.9 67.9

81 50.4 (101.0) 84.5 67.2

80 49.8 (100.3) 84.1 66.5

79 49.2 99.6 83.8 65.8

78 48.6 99.0 83.4 65.1

77 48.0 98.3 83.0 64.4

76 47.4 97.6 82.6 63.7

75 46.9 96.9 82.3 63.0

74 46.3 96.2 81.9 62.4

73 45.7 95.6 81.5 61.7

72 45.1 94.9 81.2 61.0

71 44.5 94.2 80.8 60.3

70 43.9 93.5 80.4 59.6

69 43.3 92.8 80.1 58.9

68 42.8 92.2 79.7 58.2

67 42.2 91.5 79.3 57.5

66 41.6 90.8 78.9 56.8

65 41.0 90.1 78.6 56.1

64 40.4 89.5 78.2 55.4

70.2

69.2

68.2

67.2

66.1

65.1

64.1

63.1

62.1

61.1

60.1

59.0

58.0

57.0

56.0

55.0

54.0

52.9

51.9

50.9

49.9

48.9

47.9

46.8

45.8

44.8

43.8

42.8

41.8

40.7

39.7

38.7

37.7

36.7

35.7

34.7

33.6

63

62

61

60

Standard

deviation

C

39.8

39.3

38.7

38.1

1.44

88.8

88.1

87.4

86.8

2.75

77.8

77.5

77.1

76.7

2.29

54.7

54.0

53.3

52.6

1.67

32.6

31.6

30.6

29.6

1.57