[整理版]hra hrc硬度对比表

[整理版]hra hrc硬度对比 表 关于同志近三年现实表现材料材料类招标技术评分表图表与交易pdf视力表打印pdf用图表说话 pdf 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 kgf100 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 kgf 100 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 kgf100 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 2.95 429 455 73.4 --- 45.7 59.7 83.4 64.6 49.9 1510 3.00 415 440 72.8 --- 44.5 58.8 82.8 63.5 48.4 1460 3.05 401 425 72.0 --- 43.1 57.8 82.0 62.3 46.9 1390 3.10 388 410 71.4 --- 41.8 56.8 81.4 61.1 45.3 1330 3.15 375 396 70.6 --- 40.4 55.7 80.6 59.9 43.6 1270 3.20 363 383 70.0 --- 39.1 54.6 80.0 58.7 42.0 1220 (110.03.25 352 372 69.3 37.9 53.8 79.3 57.6 40.5 1180 ) (109.03.30 341 360 68.7 36.6 52.8 78.6 56.4 39.1 1130 ) (108.53.35 331 350 68.1 35.5 51.9 78.0 55.4 37.8 1095 ) (108.03.40 321 339 67.5 34.3 51.0 77.3 54.3 36.4 1060 ) (107.53.45 311 328 66.9 33.1 50.0 76.7 53.3 34.4 1025 ) (107.03.50 302 319 66.3 32.1 49.3 76.1 52.2 33.8 1005 ) (106.03.55 293 309 65.7 30.9 48.3 75.5 51.2 32.4 970 ) (105.53.60 285 301 65.3 29.9 47.6 75.0 50.3 31.2 950 ) (104.53.65 277 292 64.6 28.8 46.7 74.4 49.3 29.9 925 ) (104.03.70 269 284 64.1 27.6 45.9 73.7 48.3 28.5 895 ) (103.03.75 262 276 63.6 26.6 45.0 73.1 47.3 27.3 875 ) (102.03.80 255 269 63.0 25.4 44.2 72.5 46.2 26.0 850 ) 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 kgf100 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 N N (101.03.85 248 261 62.5 24.2 43.2 71.7 45.1 24.5 825 ) 3.90 241 253 61.8 100.0 22.8 42.0 70.9 43.9 22.8 800 3.95 235 247 61.4 99.0 21.7 41.4 70.3 42.9 21.5 785 4.00 229 241 60.8 98.2 20.5 40.5 69.7 41.9 20.1 765 4.05 223 234 97.3 (18.8) --- --- --- --- --- 4.10 217 228 --- 96.4 (17.5) --- --- --- --- 725 4.15 212 222 --- 95.5 (16.0) --- --- --- --- 705 4.20 207 218 --- 94.6 (15.2) --- --- --- --- 690 4.25 201 212 --- 93.8 (13.8) --- --- --- --- 675 4.30 197 207 --- 92.8 (12.7) --- --- --- --- 655 4.35 192 202 --- 91.9 (11.5) --- --- --- --- 640 4.40 187 196 --- 90.7 (10.0) --- --- --- --- 620 4.45 183 192 --- 90.0 (9.0) --- --- --- --- 615 4.50 179 188 --- 89.0 (8.0) --- --- --- --- 600 4.55 174 182 --- 87.8 (6.4) --- --- --- --- 585 4.60 170 178 --- 86.8 (5.4) --- --- --- --- 570 4.65 167 175 --- 86.0 (4.4) --- --- --- --- 560 4.70 163 171 --- 85.0 (3.3) --- --- --- --- 545 4.80 156 163 --- 82.9 (0.9) --- --- --- --- 525 4.90 149 156 --- 80.8 --- --- --- --- --- 505 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 kgf100 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 5.00 143 150 --- 78.7 --- --- --- --- --- 490 5.10 137 143 --- 76.4 --- --- --- --- --- 460 5.20 131 137 --- 74.0 --- --- --- --- --- 450 5.30 126 132 --- 72.0 --- --- --- --- --- 435 5.40 121 127 --- 69.8 --- --- --- --- --- 415 5.50 116 122 --- 67.6 --- --- --- --- --- 400 5.60 111 117 --- 65.7 --- --- --- --- --- 385 硬度换算表 (以 HRC 硬度为基准) 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 kgf100 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 RockwelRockwe 3000 RockweRockwe ApproximRockwe l D ll C kgf ll A ll B ate ll C 15 30 45 150 kgf Vickers 10 mm 60 kgf 100 kgf100 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 kgf100 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 excel标准偏差excel标准偏差函数exl标准差函数国标检验抽样标准表免费下载红头文件格式标准下载 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 A, B(Rockwell C Hardness Range) Rockwell Rockwell Brinell Hardness Hardness Superficial CNumber Number Hardness Number Rockwell Knoop Rockwell C Hardness, 10-mm 10-mm 15-N 30-N 45-N C Hardness Vickers Number Standard Carbide A D Scale, Scale, Scale, Hardness Number Hardness 500-gf Scleroscope Ball, Ball, Scale, Scale, 15-kgf 30-kgf 45-kgf Number 150 kgf Number 3000-kgf 3000-kgf and 60-kgf 100-kgf (HR (HR (HR Hardness 150 kgf D(HRC) (HV) (HBS) (HBW) Over (HK) (HRA) (HRD) 15-N) 30-N) 45-N) Number (HRC) 68 940 --- --- 920 85.6 76.9 93.2 84.4 75.4 97.3 68 67 900 --- --- 895 85.0 76.1 92.9 83.6 74.2 95.0 67 66 865 --- --- 870 84.5 75.4 92.5 82.8 73.3 92.7 66 65 832 --- (739) 846 83.9 74.5 92.2 81.9 72.0 90.6 65 64 800 --- (722) 822 83.4 73.8 91.8 81.1 71.0 88.5 64 63 772 --- (705) 799 82.8 73.0 91.4 80.1 69.9 86.5 63 62 746 --- (688) 776 82.3 72.2 91.1 79.3 68.8 84.5 62 61 720 --- (670) 754 81.8 71.5 90.7 78.4 67.7 82.6 61 60 697 --- (654) 732 81.2 70.7 90.2 77.5 66.6 80.8 60 59 674 --- 634 710 80.7 69.9 89.8 76.6 65.5 79.0 59 58 653 --- 615 690 80.1 69.2 89.3 75.7 64.3 77.3 58 57 633 --- 595 670 79.6 68.5 88.9 74.8 63.2 75.6 57 56 613 --- 577 650 79.0 67.7 88.3 73.9 62.0 74.0 56 55 595 --- 560 630 78.5 66.9 87.9 73.0 60.9 72.4 55 54 577 --- 543 612 78.0 66.1 87.4 72.0 59.8 70.9 54 53 560 --- 525 594 77.4 65.4 86.9 71.2 58.6 69.4 53 52 544 (500) 512 576 76.8 64.6 86.4 70.2 57.4 67.9 52 51 528 (487) 496 558 76.3 63.8 85.9 69.4 56.1 66.5 51 50 513 (475) 481 542 75.9 63.1 85.5 68.5 55.0 65.1 50 49 498 (464) 469 526 75.2 62.1 85.0 67.6 53.8 63.7 49 48 484 451 455 510 74.7 61.4 84.5 66.7 52.5 62.4 48 47 471 442 443 495 74.1 60.8 83.9 65.8 51.4 61.1 47 46 458 432 432 480 73.6 60.0 83.5 64.8 50.3 59.8 46 Rockwell Rockwell Brinell Hardness Hardness Superficial CNumber Number Hardness Number Rockwell Knoop Rockwell C Hardness, 10-mm 10-mm 15-N 30-N 45-N C Hardness Vickers Number Standard Carbide A D Scale, Scale, Scale, Hardness Number Hardness 500-gf Scleroscope Ball, Ball, Scale, Scale, 15-kgf 30-kgf 45-kgf Number 150 kgf Number and Hardness 3000-kgf 3000-kgf 60-kgf 100-kgf (HR (HR (HR 150 kgf D(HRC) (HV) (HBS) (HBW) Over (HK) (HRA) (HRD) 15-N) 30-N) 45-N) Number (HRC) 45 446 421 421 466 73.1 59.2 83.0 64.0 49.0 58.5 45 44 434 409 409 452 72.5 58.5 82.5 63.1 47.8 57.3 44 43 423 400 400 438 72.0 57.7 82.0 62.2 46.7 56.1 43 42 412 390 390 426 71.5 56.9 81.5 61.3 45.5 54.9 42 41 402 381 381 414 70.9 56.2 80.9 60.4 44.3 53.7 41 40 392 371 371 402 70.4 55.4 80.4 59.5 43.1 52.6 40 39 382 362 362 391 69.9 54.6 79.9 58.6 41.9 51.5 39 38 372 353 353 380 69.4 53.8 79.4 57.7 40.8 50.4 38 37 363 344 344 370 68.9 53.1 78.8 56.8 39.6 49.3 37 36 354 336 336 360 68.4 52.3 78.3 55.9 38.4 48.2 36 35 345 327 327 351 67.9 51.5 77.7 55.0 37.2 47.1 35 34 336 319 319 342 67.4 50.8 77.2 54.2 36.1 46.1 34 33 327 311 311 334 66.8 50.0 76.6 53.3 34.9 45.1 33 32 318 301 301 326 66.3 49.2 76.1 52.1 33.7 44.1 32 31 310 294 294 318 65.8 48.4 75.6 51.3 32.5 43.1 31 30 302 286 286 311 65.3 47.7 75.0 50.4 31.3 42.2 30 29 294 279 279 304 64.8 47.0 74.5 49.5 30.1 41.3 29 28 286 271 271 297 64.3 46.1 73.9 48.6 28.9 40.4 28 27 279 264 264 290 63.8 45.2 73.3 47.7 27.8 39.5 27 26 272 258 258 284 63.3 44.6 72.8 46.8 26.7 38.7 26 25 266 253 253 278 62.8 43.8 72.2 45.9 25.5 37.8 25 24 260 247 247 272 62.4 43.1 71.6 45.0 24.3 37.0 24 23 254 243 243 266 62.0 42.1 71.0 44.0 23.1 36.3 23 22 248 237 237 261 61.5 41.6 70.5 43.2 22.0 35.5 22 21 243 231 231 256 61.0 40.9 69.9 42.3 20.7 34.8 21 20 238 226 226 251 60.5 40.1 69.4 41.5 19.6 34.2 20 A In the table headings, force refers to total test forces. B Appendix X1 contains equations converting determined hardness scale numbers to Rockwell C hardness numbers for non-austenitic steels. C The Brinell hardness numbers in parentheses are outside the range recommended for Brinell hardness testing in 8.1 of Test Method E 10. D These Scleroscope hardness conversions are based on Vickers—Scleroscope hardness relationships developed from Vickers hardness data provided by the National Bureau of Standards for 13 steel reference blocks, Scleroscope hardness values obtained on these blocks by the Shore Instrument and Mfg. Co., Inc., the Roll Manufacturers Institute, and members of this institute, and also on hardness conversions previously published by the American Society for Metals and the Roll Manufacturers Institute. Approximate Hardness Conversion Numbers for Non-Austenitic Steels A, B(Rockwell B Hardness Range) Knoop Rockwell Superficial Hardness Number Rockwell Rockwell Rockwell Rockwell Brinell Hardness B Vickers A F B Hardness Number, Hardness Hardness Hardness Hardness Hardness 15-T Scale, 30-T Scale, 45-T Scale, Number, 500-gf, Number, Number Number, Number, Number, 15-kgf, 30-kgf, 45-kgf, 3000-kgf, and 100-kgf (HV) 60-kgf, 60-kgf, 100-kgf, (HR 15-T) (HR 30-T) (HR 45-T) (HBS) Over (HRB) (HRA) (HRF) (HRB) (HK) 100 240 240 251 61.5 --- 93.1 83.1 72.9 100 99 234 234 246 60.9 --- 92.8 82.5 71.9 99 98 228 228 241 60.2 --- 92.5 81.8 70.9 98 97 222 222 236 59.5 --- 92.1 81.1 69.9 97 96 216 216 231 58.9 --- 91.8 80.4 68.9 96 95 210 210 226 58.3 --- 91.5 79.8 67.9 95 94 205 205 221 57.6 --- 91.2 79.1 66.9 94 93 200 200 216 57.0 --- 90.8 78.4 65.9 93 92 195 195 211 56.4 --- 90.5 77.8 64.8 92 91 190 190 206 55.8 --- 90.2 77.1 63.8 91 90 185 185 201 55.2 --- 89.9 76.4 62.8 90 89 180 180 196 54.6 --- 89.5 75.8 61.8 89 88 176 176 192 54.0 --- 89.2 75.1 60.8 88 87 172 172 188 53.4 --- 88.9 74.4 59.8 87 86 169 169 184 52.8 --- 88.6 73.8 58.8 86 85 165 165 180 52.3 --- 88.2 73.1 57.8 85 84 162 162 176 51.7 --- 87.9 72.4 56.8 84 83 159 159 173 51.1 --- 87.6 71.8 55.8 83 82 156 156 170 50.6 --- 87.3 71.1 54.8 82 81 153 153 167 50.0 --- 86.9 70.4 53.8 81 80 150 150 164 49.5 --- 86.6 69.7 52.8 80 79 147 147 161 48.9 --- 86.3 69.1 51.8 79 Knoop Rockwell Superficial Hardness Number Rockwell Rockwell Rockwell Rockwell Brinell Hardness B Vickers A F B Hardness Number, Hardness Hardness Hardness Hardness Hardness 15-T Scale, 30-T Scale, 45-T Scale, Number, 500-gf, Number, Number Number, Number, Number, 15-kgf, 30-kgf, 45-kgf, 3000-kgf, and 100-kgf (HV) 60-kgf, 60-kgf, 100-kgf, (HR 15-T) (HR 30-T) (HR 45-T) (HBS) Over (HRB) (HRA) (HRF) (HRB) (HK) 78 144 144 158 48.4 --- 86.0 68.4 50.8 78 77 141 141 155 47.9 --- 85.6 67.7 49.8 77 76 139 139 152 47.3 --- 85.3 67.1 48.8 76 75 137 137 150 46.8 99.6 85.0 66.4 47.8 75 74 135 135 147 46.3 99.1 84.7 65.7 46.8 74 73 132 132 145 45.8 98.5 84.3 65.1 45.8 73 72 130 130 143 45.3 98.0 84.0 64.4 44.8 72 71 127 127 141 44.8 97.4 83.7 63.7 43.8 71 70 125 125 139 44.3 96.8 83.4 63.1 42.8 70 69 123 123 137 43.8 96.2 83.0 62.4 41.8 69 68 121 121 135 43.3 95.6 82.7 61.7 40.8 68 67 119 119 133 42.8 95.1 82.4 61.0 39.8 67 66 117 117 131 42.3 94.5 82.1 60.4 38.7 66 65 116 116 129 41.8 93.9 81.8 59.7 37.7 65 64 114 114 127 41.4 93.4 81.4 59.0 36.7 64 63 112 112 125 40.9 92.8 81.1 58.4 35.7 63 62 110 110 124 40.4 92.2 80.8 57.7 34.7 62 61 108 108 122 40.0 91.7 80.5 57.0 33.7 61 60 107 107 120 39.5 91.1 80.1 56.4 32.7 60 59 106 106 118 39.0 90.5 79.8 55.7 31.7 59 58 104 104 117 38.6 90.0 79.5 55.0 30.7 58 57 103 103 115 38.1 89.4 79.2 54.4 29.7 57 56 101 101 114 37.7 88.8 78.8 53.7 28.7 56 55 100 100 112 37.2 88.2 78.5 53.0 27.7 55 54 --- --- 111 36.8 87.7 78.2 52.4 26.7 54 Knoop Rockwell Superficial Hardness Number Rockwell Rockwell Rockwell Rockwell Brinell Hardness B Vickers A F B Hardness Number, Hardness Hardness Hardness Hardness Hardness 15-T Scale, 30-T Scale, 45-T Scale, Number, 500-gf, Number, Number Number, Number, Number, 15-kgf, 30-kgf, 45-kgf, 3000-kgf, and 100-kgf (HV) 60-kgf, 60-kgf, 100-kgf, (HR 15-T) (HR 30-T) (HR 45-T) (HBS) Over (HRB) (HRA) (HRF) (HRB) (HK) 53 --- --- 110 36.3 87.1 77.9 51.7 25.7 53 52 --- --- 109 35.9 86.5 77.5 51.0 24.7 52 51 --- --- 108 35.5 86.0 77.2 50.3 23.7 51 50 --- --- 107 35.0 85.4 76.9 49.7 22.7 50 49 --- --- 106 34.6 84.8 76.6 49.0 21.7 49 48 --- --- 105 34.1 84.3 76.2 48.3 20.7 48 47 --- --- 104 33.7 83.7 75.9 47.7 19.7 47 46 --- --- 103 33.3 83.1 75.6 47.0 18.7 46 45 --- --- 102 32.9 82.6 75.3 46.3 17.7 45 44 --- --- 101 32.4 82.0 74.9 45.7 16.7 44 43 --- --- 100 32.0 81.4 74.6 45.0 15.7 43 42 --- --- 99 31.6 80.8 74.3 44.3 14.7 42 41 --- --- 98 31.2 80.3 74.0 43.7 13.6 41 40 --- --- 97 30.7 79.7 73.6 43.0 12.6 40 39 --- --- 96 30.3 79.1 73.3 42.3 11.6 39 38 --- --- 95 29.9 78.6 73.0 41.6 10.6 38 37 --- --- 94 29.5 78.0 72.7 41.0 9.6 37 36 --- --- 93 29.1 77.4 72.3 40.3 8.6 36 35 --- --- 92 28.7 76.9 72.0 39.6 7.6 35 34 --- --- 91 28.2 76.3 71.7 39.0 6.6 34 33 --- --- 90 27.8 75.7 71.4 38.3 5.6 33 32 --- --- 89 27.4 75.2 71.0 37.6 4.6 32 31 --- --- 88 27.0 74.6 70.7 37.0 3.6 31 30 --- --- 87 26.6 74.0 70.4 36.3 2.6 30 A In table headings, kgf refers to total test force. B Appendix X2 contains equations converting determined hardness numbers to Rockwell B hardness numbers for non-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 93 207 92 202 91 197 90 192 89 187 88 183 87 178 86 174 85 170 84 167 83 163 82 160 81 156 80 153 79 150 78 147 77 144 76 142 75 139 74 137 73 135 72 132 71 130 70 128 69 126 68 124 67 122 66 120 65 118 64 116 63 114 62 113 61 111 60 110 Approximate Rockwell Hardness Conversion Numbers for Austenitic A,BStainless Steel Sheet 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 71.9 81.6 61.8 46.4 42 71.4 81.0 61.0 45.2 41 70.9 80.5 60.1 44.1 40 70.4 80.0 59.2 43.0 39 69.9 79.5 58.4 41.8 38 69.3 79.0 57.5 40.7 37 68.8 78.5 56.6 39.6 36 68.3 78 55.7 38.4 35 67.8 77.5 54.9 37.3 34 67.3 77.0 54.0 36.1 33 66.8 76.5 53.1 35.0 32 66.3 75.9 52.3 33.9 31 65.8 75.4 51.4 32.7 30 65.3 74.9 50.5 31.6 29 64.8 74.4 49.6 30.4 28 64.3 73.9 48.8 29.3 27 63.8 73.4 47.9 28.2 26 63.3 72.9 47.0 27.0 25 62.8 72.4 46.2 25.9 24 62.3 71.9 45.3 24.8 23 61.8 71.3 44.4 23.6 22 61.3 70.8 43.5 22.5 21 60.8 70.3 42.7 21.3 20 60.3 69.8 41.8 20.2 B Scale, A Scale, F Scale, 15-T Scale, 30-T Scale, 45-T Scale, 100-kgf, 60-kgf, 60-kgf, 15-kgf, 30-kgf, 45-kgf, 1/16-in. Diamond 1/16-in. 1/16-in. 1/16-in. 1/16-in. (1.588-mm) Penetrator (1.588-mm) (1.588-mm) (1.588-mm) (1.588-mm) Ball (HRB) (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 70.2 99 60.9 (113.2) 91.2 79.7 69.2 98 60.3 (112.5) 90.8 79.0 68.2 97 59.7 (111.8) 90.4 78.3 67.2 96 59.1 (111.1) 90.1 77.7 66.1 95 58.5 (110.5) 89.7 77.0 65.1 94 58.0 (109.8) 89.3 76.3 64.1 93 57.4 (109.1) 88.9 75.6 63.1 92 56.8 (108.4) 88.6 74.9 62.1 91 56.2 (107.8) 88.2 74.2 61.1 90 55.6 (107.1) 87.8 73.5 60.1 89 55.0 (106.4) 87.5 72.8 59.0 88 54.5 (105.7) 87.1 72.1 58.0 87 53.9 (105.0) 86.7 71.4 57.0 86 53.3 (104.4) 86.4 70.7 56.0 85 52.7 (103.7) 86.0 70.0 55.0 84 52.1 (103.0) 85.6 69.3 54.0 83 51.5 (102.3) 85.2 68.6 52.9 82 50.9 (101.7) 84.9 67.9 51.9 81 50.4 (101.0) 84.5 67.2 50.9 80 49.8 (100.3) 84.1 66.5 49.9 79 49.2 99.6 83.8 65.8 48.9 78 48.6 99.0 83.4 65.1 47.9 77 48.0 98.3 83.0 64.4 46.8 76 47.4 97.6 82.6 63.7 45.8 75 46.9 96.9 82.3 63.0 44.8 74 46.3 96.2 81.9 62.4 43.8 73 45.7 95.6 81.5 61.7 42.8 72 45.1 94.9 81.2 61.0 41.8 71 44.5 94.2 80.8 60.3 40.7 70 43.9 93.5 80.4 59.6 39.7 69 43.3 92.8 80.1 58.9 38.7 68 42.8 92.2 79.7 58.2 37.7 67 42.2 91.5 79.3 57.5 36.7 66 41.6 90.8 78.9 56.8 35.7 65 41.0 90.1 78.6 56.1 34.7 64 40.4 89.5 78.2 55.4 33.6 63 39.8 88.8 77.8 54.7 32.6 62 39.3 88.1 77.5 54.0 31.6 61 38.7 87.4 77.1 53.3 30.6 60 38.1 86.8 76.7 52.6 29.6 Standard 1.44 2.75 2.29 1.67 1.57 Cdeviation