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API 6AM : 1995
Withdrawn
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TECHNICAL REPORT ON MATERIAL TOUGHNESS
23-02-2021
01-09-1995
1 SCOPE
1.1 Initial Task Group Charge
1.2 Amended Task Group Charge
2 GENERAL HISTORY OF API 6A/6D ACTIVITIES RELATIVE TO
IMPACT TESTING OF MATERIALS
3 MATERIALS TOUGHNESS TASK GROUP HISTORY
4 API SPECIFICATION 6A, FIFTEENTH EDITION - BRITTLE
FRACTURE PREVENTION BENEFITS
4.1 General
4.2 Design Considerations Now Required
4.3 Design Methods Now required
4.4 Materials Requirements Now Included
4.5 Comprehensive Welding Requirements Have Been
Established
4.6 Important New Quality Control Requirements
Have Been Added
5 ANALYSIS
5.1 Approach
5.2 The Use of CVN Requirements in Materials
Specifications
5.2.1 Historical Background
5.2.2 Quality Assurance
5.2.3 Fitness-for-Purpose Analyses
5.3 API 6A Task Group Fitness - For Purpose
Analysis
5.3.1 Assumptions
5.3.2 Design Stress
5.3.3 Defect Size
5.3.4 KIC-CVN Correlations
5.3.5 Derivation of the CVN Toughness
Requirement
5.3.6 Discussion
5.3.7 Conclusions
APPENDIX A - REFERENCES AND BIBLIOGRAPHY
Figures
1 CVN Values for 75K Material - Surface Crack and 50
ksi Stress
2 CVN Values for 75K Material - Surface Crack and 75
ksi Stress
3 CVN Values for 75K Material - Volumetric Crack and
50 ksi Stress
4 CVN Values for 75K Material - Volumetric Crack and
75 ksi Stress
Tables
1 CVN Values Derived by KIC-CVN Correlations
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