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24

ASTM Hardness Conversion Chart 

Rockwell C Hardness Range 

Approximate Hardness Conversion Numbers for Non-Austenitic Steels, According to ASTM E-140 

The Conversion Values contained herein should be considered approximate only and may be inaccurate for specific 

applications 

C A D 

15N 

30N 

45N 

Vickers 

Knoop 

Brinell 

Tensile 

150 kgt 

60 kgt 

100kgt 

15kgt 

30 kgt 

45 kgt 

Hardness Hardness Hardness Strength 

diamond diamond diamond diamond diamond diamond 

500gr 

3000kgt  1000 

lbs/ 

 

 

 

 

and over 

10mm ball  square in 

68  85.6 76.9 93.2 84.4 75.4  940  920  .. 

.. 

67  85.0 76.1 92.9 83.6 74.2  900  895  .. 

.. 

66  84.5 75.4 92.5 82.8 73.3  865  870  .. 

.. 

65  83.9 74.5 92.2 81.9 72.0 832  846 (739)   
64  83.4 73.8 91.8 81.1 71.0 800  822 (722)   
63  82.8 73.0 91.4 80.1 69.9 772  799 (705)   
62  82.3 72.2 91.1 79.3 68.8 745  776 (688)   
61  81.8 71.5 90.7 78.4 67.7 720  754 (670)   
60  81.2 70.7 90.2 77.5 66.6 697  732 (654)   
59  80.7 69.9 89.8 76.6 65.5 674  710 (634) 351 
58  80.1 69.2 89.3 75.7 64.3 653 690 615 338 
57  79.6 68.5 88.9 74.8 63.2 633 670 595 325 
56  79.0 67.7 88.3 73.9 62.0 613 650 577 313 
55  78.5 66.9 87.9 73.0 60.9 595 630 560 301 
54  78.0 66.1 87.4 72.0 59.8 577 612 543 292 
53  77.4 65.4 86.9 71.2 58.6 560 594 525 283 
52  76.8 64.6 84.4 70.2 57.4 544 576 512 273 
51  76.3 63.8 85.9 69.4 56.1 528 558 496 264 
50  75.9 63.1 85.5 68.5 55.0 513 542 481 255 
49  75.2 62.1 85.0 67.6 53.8 498 526 469 246 
48  74.7 61.4 84.6 66.7 52.5 484 510 455 237 
47  74.1 60.8 83.9 65.8 51.4 471 495 443 229 
46 73.6 60 83.5 64.8 50.3 458 480 432 221 
45  73.1 59.2 83.0 64.0 49.0 446 466 421 215 
44  72.5 58.5 82.5 63.1 47.8 434 452 409 208 
43  72.0 57.7 82.0 62.2 46.7 423 438 400 201 
42  71.5 56.9 81.5 61.3 45.5 412 426 390 195 
41  70.9 56.2 80.9 60.4 44.3 402 414 381 188 
40  70.4 55.4 80.4 59.5 43.1 392 402 371 182 
39  69.9 54.6 79.9 58.6 41.9 382 391 362 177 
38  69.4 53.8 79.4 57.7 40.8 372 380 353 171 
37  58.9 53.1 78.8 56.8 39.6 363 370 344 166 
36  68.4 52.3 78.3 55.9 38.4 354 360 336 161 
35  67.9 51.5 77.7 55.0 37.2 345 351 327 156 
34  67.4 50.8 77.2 54.2 36.1 336 342 319 152 
33  66.8 50.0 76.6 53.3 34.9 327 334 311 149 
32  66.3 49.2 76.1 52.1 33.7 318 326 301 146 
31  65.8 48.4 75.6 51.3 32.5 310 318 294 141 
30  65.3 47.7 75.0 50.4 31.3 302 311 286 138 
29  64.8 47.0 74.5 49.5 30.1 294 304 279 135 
28  64.3 46.1 73.9 48.6 28.9 286 297 271 131 
27  63.8 45.2 73.3 47.7 27.8 279 290 264 128 
26  63.3 44.6 72.8 46.8 26.7 272 284 258 125 
25  62.8 43.8 72.2 45.9 25.5 266 278 253 123 
24  62.4 43.1 71.6 45.0 24.3 260 272 247 119 
23  62.0 42.1 71.0 44.0 23.1 254 266 243 117 
22  61.5 41.6 70.5 43.2 22.0 248 261 237 115 
21  61.0 40.9 69.9 42.3 20.7 243 256 231 112 
20  60.5 40.1 69.4 41.5 19.6 238 251 226 110 

 

 

 

 

 

 

 

 

 

 

Hardness values in Brackets are outside the range recommended for Brinell testing in ASTM E-10. 

The above tables is from ASTM E-110 except values for E-scale and Tensile Strength which are not from or according to ASTM Standards. 

Reprinted from the Annual Book of ASTM Standards, 

Copyright American Society for Testing and Materials, 100 Barr Harbor Drive,West Conshohocken,PA 19428-2959. 

Содержание MET-U1A

Страница 1: ... Manual 201 933 6300 www phase2plus com Precision Measuring Tools Indexing Fixtures Workholding Fixtures Hardness Testers Ultrasonic Thickness Surface Finish Coating Thickness IP66 Dust Waterproof Protection Non Destructive Hardness Tester ...

Страница 2: ...expressed by the following formula HL 1000 x VB VA Where HL is Leeb Hardness VB is the rebound velocity of the impact body VA is the impact velocity of the impact body Ultrasonic Testing UCI Method information UCI method Ultrasonic Contact Impedance a hardness testing method developed by Dr Claus Kleesattel in 1961 based on the measurement of the frequency shift of a resonating rod caused by the e...

Страница 3: ...e of checking hardness on a variety of metals with varying mass and thickness Especially suited for checking finished articles with a polished surface since there is no visible imprint left after testing Restrictions include all coarse grain structured metals such as Iron or items that are less than 1mm in thickness Choosing between Dynamic and Ultrasonic Testing The choice between using the dynam...

Страница 4: ...ss tests in other scales i e Superficial Rockwell HRN and HRT or any other common hardness scale Conduct hardness test of metals that have significantly different properties from steel iron aluminum and copper alloys etc Setting Test Parameters 1 Scale Selection Press Left or Right Arrow for selections HRC HRB HB HV HLD H1 H2 H3 Ø Yes No 2 Operation Mode Selection Press Left or Right Arrow for sel...

Страница 5: ...rity of the battery Be sure to dispose of the battery according to local regulations The battery capacity indicator is shown on the right side of the display Three dark squares inside the battery symbol show the battery condition As the battery discharges the squares disappear one by one from top to bottom Battery charging can be done with the supplied a c adapter or via USB connection to your PC ...

Страница 6: ...sducer plug is equipped with a rotating cylindrical lock To connect the transducer make the following steps turn the lock counterclockwise up to the stop Insert the plug of the transducer into the 5 pin female port by pushing slightly turn the lock clockwise slightly until you feel it lock Power Unit On Press Ð button to power on the hardness tester The MET will automatically recognize the type of...

Страница 7: ... level TEST Operation Mode Selection Select the required operation mode TEST or CALIBRATE or PROCESS by pushing either Í and Î buttons when you are in the parameter that you need press the Ð button to confirm this procedure The hardness tester is now ready for that operation Operation Canceling To cancel an operation or to return to the previous one press the Ï button Test Mode Test mode and all o...

Страница 8: ... Display Archive Mode Archive cell number changing While in the Archive mode Display is shown above you need to push either the Í or Î buttons to change the archive cell number The change of the archive cell number will result in the change of the readings of the measured value 58 1 into the readings of another measured value saved under the relevant archive number 06 07 08 etc The hardness scale ...

Страница 9: ...ll automatically start the archive operation for you to save the obtained results If you do not want to save the results and want to continue your measurement push Ð button to switch to measurement and recording operation Deleting Test Results Measurement mode only After you have taken a test you should push the Í button This will delete that test result and the display will then show the previous...

Страница 10: ...ss the Î button to change the archive location by increasing numbers Î Once you have selected your archive starting point you need to press the Ð button to bring you to the Measurement mode At this point you may begin taking tests Recording measurements in the archive after choosing starting point recording the measured hardness value 58 1 or mean value into the archive is done by pushing the Î bu...

Страница 11: ...blocks with maximum and minimum values in the hardness scale Examples for calibration along the whole C Rockwell scale two reference hardness blocks are required with the values of 25 5 HRC and 65 5 HRC If you do not use the whole range of C Rockwell but only the range of 20 40 HRC perform the calibration on reference hardness blocks with the values of 25 5 HRC and 45 5 HRC Reasons to perform a ca...

Страница 12: ...e with each test taken 0 00 the measured value on Rockwell hardness scale HRC no test taken yet Calib No 1 calibration tests performed will increase after each Set Blinking symbol Transducer is ready Battery symbol charge remaining in battery Measurement on reference hardness block 1 step 1 obtaining of mean hardness number Take one reference hardness block Conduct at least FIVE measurements Avera...

Страница 13: ... be within acceptable tolerances for the scale If the obtained value exceeds the tolerance of the nominal value then you need to perform CLEAR CALIBRATION function and repeat the CALIBRATION procedure Clear Calibration Operation Hardness tester calibration by users requires highly skilled professional personnel If you failed to introduce the correction to the hardness tester calibration for the se...

Страница 14: ...ion by Í or Î button and confirm your selection by the Ð button Mean Value Operation Mean Value operation is used for mean value computation within any interval of the archive cell sample interval Display indication is shown on the figure Hardness scale Mean hardness value on Hrc scale Battery charge symbol Sample interval The meaning of words and symbols on the display HRC Rockwell C hardness sca...

Страница 15: ...ls within the sample limits Clear Archive Operation Clear archive operation is designed for deleting ALL stored content in the archive cells In the Processing operation mode select clear archive operation by pushing Í or Î button Push Ð yes button The words Please wait clear archive will appear and in two seconds the archive will be deleted The First Measurement U1 ultrasonic hardness transducer B...

Страница 16: ...position The first measurement has been completed and the hardness tester is ready for the next measurement Experimental Measurement It is advisable to consider the first measurement as experimental measurement In order to acquire some experience of how to use the transducer it is recommended to conduct a number of experimental measurements Acquiring some experience working with the transducer To ...

Страница 17: ...re Use the supplied Leeb test block to check your hardness tester prior to your own testing applications Loading the impact device Press down the loading tube to lock the impact body Placement Place the support ring Round part on the bottom of device on the surface to be measured The distance between two test points should not be less than 0 1 in 3mm ...

Страница 18: ...the purpose of acquiring some experience of using the transducer you may use Clear Archive function to delete the results of the experimental measurements Acquiring some experience of working with the transducer To acquire some experience of working with the transducer it is recommended to use reference hardness blocks Measure the hardness of a reference hardness block not less than 10 20 measurem...

Страница 19: ...mpact body after it has performed 1000 2000 tests using the following procedure Screw off the support ring and take out the impact body Clean the tube by winding the brush counter clockwise into the tube until it reaches the bottom and then pull it out Repeat this procedure 5 6 times Replace the impact body and support ring Release the impact spring after each test Never apply lubrication of any k...

Страница 20: ...ssing a resonating rod with a defined indentor for example a Vickers Diamond with a fixed force against the surface of the part to be tested Calibration determination of the specific values of the significant operating parameters of the UCI instrument by comparison with values indicated by a standardized workbench hardness tester or by a set of certified test blocks Verification according to ASTM ...

Страница 21: ...en carbide is propelled against the sample surface by a spring force and then rebounds back At a distance of 1mm from the sample surface the impact and rebound velocity of the impact body are measured by the following method A permanent magnet embedded in the impact body when passing through the coil in its coil holder induces in the coil an electric voltage proportional to the velocities of the m...

Страница 22: ... its structure Increase the number of measurements to obtain average Tested area has not been prepared properly Smooth out surface finish The diamond pyramid or carbide ball are dirty Clean using rubbing alcohol The diamond pyramid tip or hardmetal ball are damaged Contact the service center D1 Dynamic Transducer The impact device is not making proper contact or alignment with the surface The hard...

Страница 23: ... 0 0 0 0 0 90 0 5 0 0 0 0 0 0 0 0 Hardness Diameters of Convex Cylindrical Surfaces Reading 1 4 in 3 8 in 1 2 in 5 8 in 3 4 in 7 8 in 1 in 6 4 mm 10mm 13mm 16 mm 19 mm 22 mm 25 mm 0 12 5 8 5 6 5 5 5 4 5 3 5 3 0 10 12 0 8 0 6 0 5 0 4 0 3 5 3 0 20 11 0 7 5 5 5 4 5 4 0 3 5 3 0 30 10 0 6 5 5 0 4 5 3 5 3 0 2 5 40 9 0 6 0 4 5 4 0 3 0 2 5 2 5 50 8 0 5 5 4 0 3 5 3 0 2 5 2 0 60 7 0 5 0 3 5 3 0 2 5 2 0 2 0 ...

Страница 24: ... 65 8 51 4 471 495 443 229 46 73 6 60 83 5 64 8 50 3 458 480 432 221 45 73 1 59 2 83 0 64 0 49 0 446 466 421 215 44 72 5 58 5 82 5 63 1 47 8 434 452 409 208 43 72 0 57 7 82 0 62 2 46 7 423 438 400 201 42 71 5 56 9 81 5 61 3 45 5 412 426 390 195 41 70 9 56 2 80 9 60 4 44 3 402 414 381 188 40 70 4 55 4 80 4 59 5 43 1 392 402 371 182 39 69 9 54 6 79 9 58 6 41 9 382 391 362 177 38 69 4 53 8 79 4 57 7 ...

Страница 25: ...76 162 81 140 83 51 1 87 6 71 8 55 8 159 173 159 80 137 82 50 6 87 3 71 1 54 8 156 170 156 76 135 81 50 86 9 70 4 53 8 153 167 153 73 133 80 49 5 86 6 69 7 52 8 150 164 150 72 130 79 48 9 86 3 69 1 51 8 147 161 147 70 128 78 48 4 86 0 68 4 50 8 144 158 144 69 126 77 47 9 85 6 67 7 49 8 141 155 141 68 124 76 47 3 85 3 67 1 48 8 139 152 139 67 122 75 46 8 86 0 66 4 47 8 137 150 137 66 120 74 46 3 84...

Страница 26: ...inted from the Annual Book of ASTM Standards copyright American Society for Testing and Materials 100 Barr Harbor Drive West Conshohocken PA 19428 2959 _____________________________________________________________________________________________________ ASTM Hardness Minimum Thickness Requirements Minimum allowable thickness for a corresponding hardness in the respective scales Minimum Minimum Roc...

Страница 27: ...to the usage and methodology of the UCI transducer and related components a Power unit on by pressing the Ð button This will bring you to the archive screen b Press the Ð button again and that will put you in the measurement screen c Place the UCI transducer on the top of one of the supplied test blocks Hold the footing at the bottom of the transducer firmly flat against the block This must be hel...

Страница 28: ...ct Beijing 100192 China Tel 86 10 82752121 Fax 86 10 82750352 General E mail info phase2china com cn MEXICO Phase II de Mexico Calle A No 4 Promer Piso Col San Marcos Azcapotzalco C P 02020 Mexico Tel 011 525 5538 39771 Fax same General E mail phase2mexico hotmail com VENEZUELA Phase II Herramientas Universales EDCM CA Av Francisco Lazo Marti CC Plaza Santa Monica PB Local Santa Monica Caracas 104...

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