AWS A4.2M : 2006

Personnel
Foreword
List of Tables
List of Figures
1. Scope
2. Normative reference
3. Principle
4. Calibration
   4.1 Coating thickness standards
   4.2 Magnet
   4.3 Instruments
   4.4 Calibration curve
   4.5 Calibration of other instruments with primary
       standards
5. Standard method for shielded metal arc covered
   electrode test pads
   5.1 Dimensions of weld metal test specimens
   5.2 Depositing weld metal test specimens
   5.3 Measuring
6. Standard methods for test pads of other processes
   and for production welds
   6.1 Standard method for test pads for other weld metals
   6.2 Production welds
7. Other Methods
   7.1 Methods
   7.2 Results
   7.3 Maintaining calibration
8. Procedures used to prepare secondary standards for
   delta ferrite in austenitic stainless steel weld metal
Annex A (informative) - Manufacture of secondary standards
                        by strip cladding
Annex B (informative) - Manufacture of secondary standards by
                        centrifugal chill casting
Bibliography
National Annexes
Annex C (Normative) - Calibration of Legacy Instruments wit
                      Primary Standards
Annex D (Informative) - Instruments
Annex E (Informative) - Guidelines for the Preparation of
                        Technical Inquiries
Annex F (Informative) - List of Deviations from ISO 8249:2000
AWS Filler Metal Specifications by Material and Welding Process
AWS Filler Metal Specifications and Related Documents

Defines the method and apparatus for measurement of the delta ferrite content, expressed as Ferrite Number (FN), in largely austenitic and duplex ferritic-austenitic stainless steel weld metal through the attractive force between a weld metal sample and a standard permanent magnet.