Hardness Conversion Chart - classes.mst.edu

1 NANANA Conversion values are approximate values only. They have been independently developed and appear to be consistent with ASTM E-140 and on next kgDiamond60 kgDiamond100 kgDiamond15 kgN Diamond30 kgN Diamond45 kgN DiamondVickers10 kg500 gm& over3000 kg10mm ball150 kg1/16" ball1000 kglbs/sq. NA 100 kg1/16" ball60 kg1/16" ball150 kg1/16" ball15 kg1/16" ball30 kg1/16" ball45 kg1/16" ball100 kg1/8" ball60 kg1/8" ball150 kg1/8" ball60 kgDiamond500 gm& over500 kg10 mm ball3000 kg10 kg1000 kglbs/sq.

2 30-T45-TEHKAHKHBHBKSIHVH ardness Conversion ChartH-18 MEASURING INSTRUMENTSH-18 (2003) full size 12/8/03 8:55 PM Page kg1/16" ball60 kg1/16" ball150 kg1/16" ball15 kg1/16" ball30 kg1/16" ball45 kg1/16" ball100 kg1/8" ball60 kg1/8" ball150 kg1/8" ball60 kgDiamond500 gm& over500 kg10 mm ball3000 kg10 kg1000 kglbs/sq. 30-T45-TEHKAHKHBHBKSIHVH ardness Conversion Chart - Can be tested - no minimum ( )92 .008 ( )90 .010 ( )88 .012 ( )838277 .014 ( ) .016 ( )68747286 .018 ( ) ( ) 576382770 .022 ( ) ( ) 51767267 .026 ( ) ( ) ( ) 605857 .032 ( ) ( ) 4345 .036 ( ) ( ) ( ) 20 Rockwell SuperficialRockwell RegularHardness ScalesHardness ScalesThicknessinches (mm) ( )91.

3 012 ( )86 .014 ( )8180 .016 ( )757271 .018 ( )686462 .020 ( ) 5553 .022 ( ) 4543 .024 ( ) 3431989494 .026 ( ) ( ) 4858076 .030 ( ) 777168 .032 ( ) ( ) 5250 .036 ( ) ( ) 2831 .040 ( ) 22 Rockwell SuperficialRockwell RegularHardness ScalesHardness ScalesThicknessinches (mm)15T30T45 TFBGC ontinued from previous or harder material can be or harder material can be Conversion values are approximate values only. They have been independently developed and appear to be consistent with ASTM E-140 and INSTRUMENTSH-19 (2003) full size 12/8/03 8:55 PM Page 1