A cylindric shape steel sample was tested by Rockwell hardness test and showed a hardness value 80 HRB. The diameter of the steel cylinder is 16mm. What is the true hardness value of this steel sample?
A cylindric shape steel sample was tested by Rockwell hardness test and showed a hardness value 80 HRB. The diameter of the steel cylinder is 16mm. What is the true hardness value of this steel sample?
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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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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