Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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A cylindric shape steel sample was tested by the Rockwell hardness test and showed a hardness value of 80 HRB. The diameter of the steel cylinder is 16 mm. What is the true hardness value of this steel sample?

### Table: Scales B, F, G
**1/16 in Ball Indenter**

**Diameter of Specimen - inches (mm)**
- **Observed Reading**
  - 1/8 (3.2)
  - 1/4 (6.4)
  - 3/8 (10)
  - 1/2 (13)
  - 5/8 (16)
  - 3/4 (19)
  - 1 (25)
  - 1-1/4 (32)
  - 1-1/2 (38)

- **100 Reading**
  - NA
  - NA
  - 5.0
  - 4.5
  - 3.5
  - 3.0
  - 2.5
  - 2.0
  - NA

- **90 Reading**
  - NA
  - NA
  - 4.0
  - 3.5
  - 2.5
  - 2.0
  - 1.5
  - 1.0
  - NA

- **80 Reading**
  - NA
  - 4.5
  - 3.0
  - 2.5
  - 2.0
  - 1.5
  - 1.0
  - 0.5
  - NA

- **70 Reading**
  - NA
  - 4.0
  - 2.5
  - 2.0
  - 1.5
  - 1.0
  - 0.5
  - 0.0
  - NA

- **60 Reading**
  - NA
  - 3.5
  - 2.0
  - 1.5
  - 1.0
  - 0.5
  - 0.0
  - 0.5
  - NA

- **50 Reading**
  - NA
  - 3.0
  - 1.5
  -
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Transcribed Image Text:A cylindric shape steel sample was tested by the Rockwell hardness test and showed a hardness value of 80 HRB. The diameter of the steel cylinder is 16 mm. What is the true hardness value of this steel sample? ### Table: Scales B, F, G **1/16 in Ball Indenter** **Diameter of Specimen - inches (mm)** - **Observed Reading** - 1/8 (3.2) - 1/4 (6.4) - 3/8 (10) - 1/2 (13) - 5/8 (16) - 3/4 (19) - 1 (25) - 1-1/4 (32) - 1-1/2 (38) - **100 Reading** - NA - NA - 5.0 - 4.5 - 3.5 - 3.0 - 2.5 - 2.0 - NA - **90 Reading** - NA - NA - 4.0 - 3.5 - 2.5 - 2.0 - 1.5 - 1.0 - NA - **80 Reading** - NA - 4.5 - 3.0 - 2.5 - 2.0 - 1.5 - 1.0 - 0.5 - NA - **70 Reading** - NA - 4.0 - 2.5 - 2.0 - 1.5 - 1.0 - 0.5 - 0.0 - NA - **60 Reading** - NA - 3.5 - 2.0 - 1.5 - 1.0 - 0.5 - 0.0 - 0.5 - NA - **50 Reading** - NA - 3.0 - 1.5 -
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