APMP.M.H-S3 Final Report Comparison on Hardness ... - BIPM
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APMP.M.H-S3 Final Report Comparison on Hardness ... - BIPM

APMP.M.H-S3 Final Report Comparison on Hardness ... - BIPM APMP.M.H-S3 Final Report Comparison on Hardness ... - BIPM

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Revision: ong>Finalong> ong>Reportong> Date: May 25, 2012 Data report forms ong>Reportong> Form 1 (For Rockwell hardness scale B) Metrology information Model of hardness primary machine SHT-31 Serial number of hardness primary machine 310039 Manufacturer of hardness primary machine Akashi - Japan Hardness indication system Laser hologauge Test force system Lever type Relative error of preliminary test force +0.01 % (+0.001 kgf) Relative uncertainty (2) of preliminary test force 0,030 % Relative error of total test force +0.01 % (+0.0057 kgf) Relative uncertainty (2) of total test force 0.01% Uncertainty of depth measuring device 0.2 m The diameter of ball indenter 1.5875 m ±2m The calibration and measurement capability (CMC) 0.40 HRB Testing condition Velocity of the indenter when reaching the surface 80-200 m/s Holding time of preliminary test force 3 s Test force loading speed 33 s Total test force duration time 4 s Time before reading permanent indentation depth 4 s Environment of comparison measurement Measurement place Hardness lab. NIMT Measurement date 28-23 April 2010 Environment (23±1)C ,(50±10)%RH Deformation of frame verification Deformation of frame (m) 1 2 3 0.11 0.13 0.11 Page 38 of 77

Revision: ong>Finalong> ong>Reportong> Date: May 25, 2012 ong>Reportong> Form2 - Result of the Rockwell hardness scale A measurements (35 - 85 HRA) Page 3/5 Laboratory: NIMT Measured Checked Measured by: Mr.Nitiwat Sasom by:Mr.Tassanai Sanponpute date: 28/04/2010 Hardness Block Number A32517 A33781 25568 B12037 B15871 A27761 A21048 Nominal Value (HRA) 35 40 55 60 70 80 85 Section 1 35.41 38.99 54.98 60.47 70.53 81.29 85.43 Section 2 35.25 39.11 55.05 60.45 70.60 81.28 85.37 Section 3 35.17 39.23 55.05 60.47 70.56 81.25 85.39 Section 4 35.26 39.12 55.06 60.43 70.58 81.28 85.38 Section 5 35.08 39.53 55.05 60.37 70.52 81.33 85.25 Section 6 35.29 39.31 55.12 60.42 70.56 81.26 85.25 Section 7 35.24 38.94 55.06 60.44 70.61 81.31 85.22 Section 8 35.44 38.98 55.03 60.45 70.64 81.34 85.28 Section 9 35.15 38.70 55.08 60.47 70.59 81.32 85.33 Average Value 35.25 39.10 55.05 60.44 70.58 81.30 85.32 Uniformity 0.36 0.83 0.14 0.10 0.12 0.09 0.21 S.D. 0.12 0.24 0.04 0.03 0.04 0.03 0.07 Correction Value 0.08 0.08 0.08 0.08 0.08 0.08 0.08 Corrected Value 35.33 39.18 55.13 60.52 70.65 81.37 85.40 Expanded uncertainty (k=2) 0.40 0.43 0.39 0.39 0.39 0.38 0.39 Page 39 of 77

Revisi<strong>on</strong>: <str<strong>on</strong>g>Final</str<strong>on</strong>g> <str<strong>on</strong>g>Report</str<strong>on</strong>g><br />

Date: May 25, 2012<br />

<str<strong>on</strong>g>Report</str<strong>on</strong>g> Form2 - Result of the Rockwell hardness scale A measurements (35 - 85 HRA)<br />

Page 3/5<br />

Laboratory: NIMT Measured Checked Measured<br />

by: Mr.Nitiwat Sasom by:Mr.Tassanai Sanp<strong>on</strong>pute date: 28/04/2010<br />

<strong>Hardness</strong> Block Number A32517 A33781 25568 B12037 B15871 A27761 A21048<br />

Nominal Value (HRA) 35 40 55 60 70 80 85<br />

Secti<strong>on</strong> 1 35.41 38.99 54.98 60.47 70.53 81.29 85.43<br />

Secti<strong>on</strong> 2 35.25 39.11 55.05 60.45 70.60 81.28 85.37<br />

Secti<strong>on</strong> 3 35.17 39.23 55.05 60.47 70.56 81.25 85.39<br />

Secti<strong>on</strong> 4 35.26 39.12 55.06 60.43 70.58 81.28 85.38<br />

Secti<strong>on</strong> 5 35.08 39.53 55.05 60.37 70.52 81.33 85.25<br />

Secti<strong>on</strong> 6 35.29 39.31 55.12 60.42 70.56 81.26 85.25<br />

Secti<strong>on</strong> 7 35.24 38.94 55.06 60.44 70.61 81.31 85.22<br />

Secti<strong>on</strong> 8 35.44 38.98 55.03 60.45 70.64 81.34 85.28<br />

Secti<strong>on</strong> 9 35.15 38.70 55.08 60.47 70.59 81.32 85.33<br />

Average Value 35.25 39.10 55.05 60.44 70.58 81.30 85.32<br />

Uniformity 0.36 0.83 0.14 0.10 0.12 0.09 0.21<br />

S.D. 0.12 0.24 0.04 0.03 0.04 0.03 0.07<br />

Correcti<strong>on</strong> Value 0.08 0.08 0.08 0.08 0.08 0.08 0.08<br />

Corrected Value 35.33 39.18 55.13 60.52 70.65 81.37 85.40<br />

Expanded uncertainty (k=2) 0.40 0.43 0.39 0.39 0.39 0.38 0.39<br />

Page 39 of 77

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