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. 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.

2 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 .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.

3 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