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

Revision: <strong>Final</strong> <strong>Report</strong>
Date: May 25, 2012
<strong>Report</strong> Form 3 - Result of the Rockwell hardness scale B measurements ( 25- 100 HRB)
Laboratory: Measured Checked
National Physical Laboratory by: Dr.S.S.K.Titus by: Dr.S.K.Jain
measured value
Measured
date: 29-10-2010
Hardness Block Number E1620 B30120 A31382 A 32411 A33748 A28422 A35542 25566 30836
Nominal Value (HRB) 25 30 40 50 60 70 80 90 100
Section 1 23 . 14 29.67 37.14 51. 41 59.32 69.76 79. 09 90. 12 99.96
Section 2 23 . 56 29.45 37.38 51. 11 59.13 70.23 78. 89 90. 05 99.87
Section 3 23 . 59 29.43 36.90 51. 50 59.19 69.97 79. 80 90. 09 100 .08
Section 4 24 . 21 29.53 37.70 51. 33 58.83 69.64 79. 41 90. 14 99.87
Section 5 24 . 77 29.74 37.82 51. 49 58.88 69.93 79. 66 90. 03 99.80
Section 6 24 . 83 29.58 37.67 51. 21 58.71 69.82 79. 85 90. 06 99.84
Section 7 24 . 70 29.26 37.87 51. 24 59.35 69.73 79. 32 90. 38 99.85
Section 8 24 . 89 29.47 38.10 51. 23 58.84 69.91 79. 33 90. 16 99.76
Section 9 24 . 86 29.52 38.24 50. 80 59.28 69.50 78. 85 90. 18 99.76
Average Value 24 . 28 29. 52 37.65 51. 26 59. 06 69.83 79. 36 90. 13 99.87
Uniformity 1.75 0.48 1.34 0.70 0.64 0.73 1.00 0.35 0.32
Correction Value Nil Nil Nil Nil Nil Nil Nil Nil Nil
Corrected Value 24 . 28 29. 52 37.65 51. 26 59. 06 69.83 79. 36 90. 13 99.87
Expanded uncertainty (k=2) 0 . 70 0.60 0.60 0 . 60 0. 60 0.52 0.56 0. 51 0. 51
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