BS 1723-3:1988

Foreword
Committees responsible
Methods
Section one. General
1.1 Scope
1.2 Definitions
1.3 General principles
1.4 Items to be agreed and documented
1.5 Separation and preparation of the test piece
1.6 Sampling procedures
Section two. Non-destructive testing of brazed joints
2.1 General
2.2 Visual and aided visual examination of brazed
      joints
2.3 Proof testing of brazed joints
2.4 Pressure and vacuum testing for leaks in brazed
      joints
2.5 Penetrant flaw detection applied to brazed
      joints
2.6 Ultrasonic examination of brazed joints
2.7 Radiographic examination of brazed joints
2.8 Thermographic testing of brazed joints
Section three. Destructive testing of brazed joints
3.1 General
3.2 Tensile and shear testing of brazed joints
3.3 Peel testing of brazed joints
3.4 Stress rupture testing of brazed joints
3.5 Impact testing of brazed joints
3.6 Bend testing of brazed joints
3.7 Hardness testing of brazed joints
3.8 Metallorgraphic examination of brazed joints
3.9 Corrosion testing of brazed joints
Section four. Testing of brazing filler metals
4.1 General
4.2 Preparation of the test sample
4.3 Chemical composition of brazing filler metal
4.4 Carbon and spatter test for brazing filler metals
Section five. Brazing filler metal melting
characteristics
5.1 General
5.2 Preparation of the test samples
5.3 Procedure
5.4 Differential thermal analysis (DTA)
5.5 Crucible balling test (flow point)
Section six. Initial determination of flow
characteristics and wettability of brazing filler metals
6.1 General
6.2 Flow characteristics and wettability test
6.3 Joint filling and metallurgical characteristics
      of high temperature brazing filler metals
Appendices
A. Brazing
B. Defects in brazed joints
C. Example of data sheet for test piece preparation
D. Recommendations for operators
E. Example of non-destructive and destructive testing
     data sheet for reporting test results
Tables
1. Brazing conditions
2. Brazing quality category
Figures
1. Direct echo technique
2. Indirect echo technique
3. Principles of shear testing brazed joints
4. Type I shear test piece dimensions
5. Type II shear test piece dimensions
6. Single-lap shear test piece
7. Simple tensile test piece
8. Tensile test piece dimensions
9. Peel test piece
10. Stress rupture test pieces
11. Impact testing
12. Free bend test
13. Supported bend tests for lap and butt joints
14. Simple bend or flexing test
15. Test piece for gaseous and wet corrosion testing
16. Test piece for liquid or liquid metal corrosion
     testing
17. Test piece for gaseous corrosion testing
18. Check for the absence of splashing
19. DTA head
20. Types of test piece for flow characteristics
     and wettability test
21. Wedge gap test piece
22. Incomplete flow at fillet and in capillary
23. Longitudinal cracks
24. Transverse cracks
25. Porosity and inclusions
26. Erosion
27. Excessive filler metal flow
28. Incorrect component assembly

Principles, test piece, sampling, visual and aided visual, proof, pressure, vacuum, penetrant, ultrasonic, radiographic and thermographic testing. Tensile and shear, peel, stress rupture, impact, bend, hardness, metallographic and corrosion testing. Brazing filler metal testing and melting characteristics.