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Operating Instructions & Parts Manual
Page 12
Approximate Leeb (Type D) Hardness Conversion for Non-Austenitic Steels (Rockwell C Hardness Range)
A
Leeb Hardness, Type D
Impact Device (HLD)
Rockwell C Hardness
150kgf (HRC)
Vickers Hardness
(HV 10)
Brinell Hardness
10mm Steel Ball
3000kgf (HBS)
828
819
809
800
791
782
773
764
755
746
737
729
720
712
703
695
687
679
671
663
655
647
640
632
625
618
611
603
596
590
583
576
570
563
557
551
545
539
533
527
521
516
510
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
762
737
711
688
667
645
625
605
586
568
550
534
517
503
487
473
460
447
434
422
410
398
388
377
368
358
349
339
330
323
314
306
299
291
284
277
271
264
258
251
245
240
234
(721)
(699)
(675)
(654)
634
614
595
577
559
542
526
511
496
482
467
455
442
430
418
407
395
385
375
365
356
347
338
328
320
313
305
297
291
283
276
270
264
258
252
246
240
235
229

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