Hardness tester research

Conversion Chart

    Rockwell-Brinell-Vikers-Shore Hardness Conversion Chart
    HRB - HRC Conversion Chart
    HL-HB-HV-HRC Conversion Chart
    Matel hardness

Probe C Min thickness of sample

 Uncoupled - 15 mm / .50 inch       

Coupled  -   1 mm / .04 inch

Surface layer thickness - .2 mm / .008 inch

Probe D Min thickness of sample

 Uncoupled - 25 mm / .98 inch       

Coupled  -   3 mm / .12 inch

 

Cimetrix THX210 Manual. $579. Ordored on 1/4/2019.

RigorTech Inc. RHL50 Manual $569. Ordered on 1/14/2019. 

Metaltest. Can do HRC 0-80 up to 2" $6566.70 + $1,070.78 (Magnetic triangular base) = $7637.48.

 

Calibration results comparison

Big test block came with RHL50: 784 HLD - 61.5 HRC

RHL50 readings: 780 HLD - 60.5 HRC

Old chain tester: 58 HRC

Small test block came with the chain tester: 22.33 HRC

RHL50 readings: 480 HLD - 17 HRC upright direction

437 HLD - 5 HRC flat direction. The block is too thin to get accurate reading.

Three joints - 4.5" OD, 0.3" wall thickness.

Joint #    RHL50 (H direction)    Chain tester

632      510 HLD - 22 HRC        11.5 HRC

631      469 HLD - 14 HRC        7.5 HRC

627      460 HLD - 11 HRC        9 HRC

 

Test result with THX210  on 3/19/2019.

Test result with RHL70  on 3/20/2019

Suporting rings for cylidrical objects.