BS 4175:1989
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
View Superseded by
Methods for superficial hardness test (Rockwell method) and for verification of superficial hardness testing machines (Rockwell method)
Hardcopy , PDF
15-01-1996
English
31-07-1989
Foreword
Committees responsible
Methods
Section one. General
1 Scope
2 Definitions
3 Symbols and designations of hardness
Section two. Determination of Rockwell superficial
hardness
4 Principle
5 Test apparatus
6 Conditions of test
7 Test procedure
8 Calculations
Section three. Direct verification of accuracy of
testing machine
9 Principle
10 Traceability
11 Force
12 Indenter
13 Measuring device
14 Anvils
15 Performance test
Section four. Indirect verification of accuracy of
testing machine
16 Principle
17 Manufacture of hardness test blocks
18 Calibration of hardness test blocks
19 Standardizing machine
20 Procedure for indirect verification of testing
machine
21 Assessment of accuracy of the testing machine
Appendices
A Monitoring the accuracy of the testing machine
B Additional information on the superficial hardness
test (Rockwell)
C Corrections to Rockwell superficial hardness values
obtained on convex cylindrical surfaces
Tables
1 Rockwell superficial hardness scales
2 Dimensions of indenter balls for standardizing
machines
3 Permissible error in value of test block
4 Correction for test results obtained with diamond
cone indenter using HRN scales
5 Correction for test results obtained with ball
indenter using HRT scales
Figures
1 Test with diamond cone (Rockwell superficial scale
HRN)
2 Test with steel ball (Rockwell superficial scale
HRT)
3 Minimum thickness of test piece for Rockwell
superficial N scales
4 Minimum thickness of test piece for Rockwell
superficial T scales
5 Approximate diameter of indentation for calculation
of indentation location
6 Typical permissible monitoring results for a
standardizing machine
7 Testing machine repeatability requirements at
different hardness values
Method of test for metals at room temperature. Also, methods for direct and indirect verification of the accuracy of a testing machine.
| Committee |
ISE/101
|
| DocumentType |
Standard
|
| Pages |
18
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
| Standards | Relationship |
| ISO 1355:1989 | Similar to |
| ISO 1024:1989 | Similar to |
| ISO 1079:1989 | Similar to |
| BS 7825-2:1996 | Calibration of rubber and plastics test equipment Calibration procedures |
| BS 4HR 100:2010+A1:2012 | Aerospace series. Procedure for inspection, testing and acceptance of wrought heat-resisting alloys |
| BS 4HR100(2010):2010 | AEROSPACE SERIES - PROCEDURE FOR INSPECTION, TESTING AND ACCEPTANCE OF WROUGHT HEAT-RESISTING ALLOYS |
| BS 1610-2:1985 | Materials testing machines and force verification equipment Specification for the grading of equipment used for the verification of the forces applied by materials testing machines |
| BS 427-1:1961 | Method for Vickers hardness test Testing of metals |
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