BS ISO 16540:2015

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Loading jig design
6 Specimen preparation
7 Strain gauging
8 Loading
9 Test environment
10 Procedure for four-point bend testing
11 Failure appraisal
12 Test report
Annex A (informative) - Surface preparation (see also
        ISO 7539-1)
Annex B (informative) - Procedure for strain gauging and
        determining uniaxial stress-strain calibration curve
Bibliography

Gives guidelines for the use of four-point bend testing to evaluate the resistance of metals including carbon steel, low alloy steels, and corrosion resistant alloys (CRAs) to stress corrosion cracking.

This International Standard provides guidelines for the use of four-point bend testing to evaluate the resistance of metals including carbon steel, low alloy steels, and corrosion resistant alloys (CRAs) to stress corrosion cracking. The method gives guidance on testing of both parent plate and welds and includes procedures for metals that have no distinct yield point in their stress-strain behaviour as well as metals with a distinct yield point. The emphasis in this International Standard is on the generic methodology of the four-point bend test. Service application will be varied and the relevant industry standard is to be consulted where appropriate.