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- Standard Procedures for Calibrating Magnetic Instruments to Measure the Delta Ferrite Content of Austenitic and Duplex Austenitic-Ferritic Stainless Steel Weld Metal
- standard by American Welding Society, 11/06/1997
- Publisher: AWS
Calibration procedures include those for the Magne-Gauge, Ferritescope, and Inspector Gauge, using primary standards. Measuring ferrite content problems discussed in the appendix.