Hardness Conversion Chart

VALUE AT THE SPINDLE®

ROCKWELLROCKWELLBRINELLVICKERSTENSILEPSI
HARDNESSHARDNESSHARDNESSHARDNESSSTRENGTH(1000lb/in2)
(HRb)(HRc)(HB)(HV)(N/mm2)
Solid Carbide Tools6712112240158
7012612743263
7313213244865
7513613745566
7714014346367
KYOCERA SGS Precision Tools (KSPT) is an ISO 9001:2015 Certified manufacturer of industry leading round solid8014715047969
carbide cutting tools. State of the art manufacturing and warehouse facilities have the capacity and processes8215315649472
8415916352576
to meet the quality and delivery demands of customers in all markets around the world. Complete inspections8616517154078
performed within its metallurgical lab and manufacturing quality departments ensure the use of high quality8917717855681
9118618860288
carbide and reliable manufacturing consistency regardless of when a cutting tool is produced.9319719663292
9621621266497
97223218695101
KSPT is proud to have pioneered some of the world’s most advanced cutting technologies due to rigorous testing9821230234756110
22236241772112
of tools, coatings, and materials within its Global Innovation Center. It is this commitment to innovation that has
23242247787114
launched patented products and technologies like the Z-Carb with its variable geometry and cutting edge prepara-24248255818118
25254261849123
tion, Series 43 APR® and APF® ultra high performance aluminum cutting tools, and the JetStream coolant technology.
27266269865125
28272275895130
29278284911132
SGS has become an important part of the KYOCERA Precision Tools family, and while the name has changed, one
30284292942136
thing has not. Its dedicated people and their relentless commitment to the customer. KSPT Technical Sales Engi-31293300973141
32302308988143
neers, Application Specialists, and Distribution Partners blanket the globe, delivering reliable service and support
333103181019147
to all market segments. It is these people and products that drive innovative application strategies and cutting tool343193271050152
353283371096159
technologies into the end user, continually exceeding expectations and providing the most Value at the Spindle®.373453491127163
383533591158168
393623701189172
403703811235179
413813951266183
423914081312190
444114221359197
454224371420206
464334521467212
484554701513219
504794971559226
514855171621235
524975321668241
545731729250
566091807262
576301884273
596701961284
606982039295
61725
62740
63780
64812
65847
66885
67926
68971

Conversions from each scale are approximate