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: Standards and Calibration Laboratory Measured Checked Measured
by:
by:
date:
K.H.Chan
T.K.Chan
3 Aug 2010
Measured Value
Hardness Block Number E1620 B30120 A31382 A32411 A33748 A34522 A35542 25566 30836
Nominal Value (HRB) 25 30 40 50 60 70 80 90 100
Section 1 26.75 31.30 40.25 53.30 61.95 71.60 81.05 91.55 100.95
Section 2 26.65 31.45 40.05 53.20 61.60 71.35 80.90 91.55 100.95
Section 3 27.00 30.95 40.45 52.95 61.60 71.50 81.55 91.40 101.00
Section 4 26.60 30.70 40.10 52.90 61.15 71.50 80.30 91.45 100.90
Section 5 25.95 30.50 39.50 52.60 61.15 71.20 80.35 91.50 100.85
Section 6 26.70 30.15 39.75 52.80 61.35 71.20 81.20 91.50 100.85
Section 7 25.85 29.05 40.00 53.00 61.75 71.20 80.50 91.50 100.85
Section 8 26.60 30.75 40.30 53.05 61.90 71.50 80.90 91.60 100.90
Section 9 25.60 30.70 39.50 53.10 61.30 71.40 80.35 91.45 100.80
Average Value 26.41 30.62 39.99 52.99 61.53 71.38 80.79 91.50 100.89
Uniformity 1.40 2.40 0.95 0.70 0.80 0.40 1.25 0.20 0.20
Correction Value -0.50 -0.50 -0.50 -0.50 -0.50 -0.50 -0.50 -0.50 -0.50
# Corrected Value (HRBW) 25.91 30.12 39.49 52.49 61.03 70.88 80.29 91.00 100.39
Expanded uncertainty (k=2) 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00
Remark: In case of the participant made an incorrect indentation or is unsure about the measurement value, please report to the pilot institute.
# Using 1/16" carbide indenter ball and depth measurement probe.
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