10. Measure the diameter of impression using the profile projector and compute for the hardness number using the formula: Where: 2P P - Applied Load D- Diameter of steel ball (8.0 mm) d - Ave. diameter of indentation BHN %3D AD(D D² – d² Raw data: Diameter Specimen (carbon steel) d1 d2 Air cooled 5.13 5.22 Oil quenched Water quenched 4.12 4.36 3.74 3.81 Note: All dimensions are in mm.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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10. Measure the diameter of impression using the profile projector and compute for the
hardness number using the formula:
Where:
2P
P – Applied Load
D - Diameter of steel ball (8.0 mm)
BHN
«D(D- /D²
– d²
d - Ave. diameter of indentation
|
Raw data:
Diameter
Specimen (carbon steel)
d1
d2
Air cooled
5.13
5.22
Oil quenched
Water quenched
4.12
4.36
3.74
3.81
Note: All dimensions are in mm.
Transcribed Image Text:10. Measure the diameter of impression using the profile projector and compute for the hardness number using the formula: Where: 2P P – Applied Load D - Diameter of steel ball (8.0 mm) BHN «D(D- /D² – d² d - Ave. diameter of indentation | Raw data: Diameter Specimen (carbon steel) d1 d2 Air cooled 5.13 5.22 Oil quenched Water quenched 4.12 4.36 3.74 3.81 Note: All dimensions are in mm.
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