1.1 This practice covers procedures and definitions for estimating ferrite content in certain grades of austenitic iron-chromium-nickel alloy castings that have compositions balanced to create the formation of ferrite as a second phase in amounts controlled to be within specified limits. Methods are described for estimating ferrite content by chemical, magnetic, and metallographic means. 1.2 The grades covered by this practice are: CF-3, CF-3A, CF-8, CF-8A, CF-3M, CF-3MA, CF-8M, CF-8C, CG-8M, and CH-10. 1.3 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the practice. 1.4 This standard does not purport to address the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use . |
E353-25 | Standard Test Methods for Chemical Analysis of Stainless, Heat-Resisting, Maraging, and Other Similar Chromium-Nickel-Iron Alloys |
A1067/A1067M-12a(2024) | Standard Specification for Test Coupons for Steel Castings (Includes all amendments and changes 8/19/2024). |
A941-26a | Standard Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys (Includes all amendments and changes 4/15/2026). |
A799/A799M-10(2020) | Standard Practice for Steel Castings, Stainless, Instrument Calibration, for Estimating Ferrite Content |
E562-19e1 | Standard Test Method for Determining Volume Fraction by Systematic Manual Point Count (Includes all amendments and changes 8/24/2020). |
A751-25 | Standard Test Methods and Practices for Chemical Analysis of Steel Products |
DeLong Diagram for Estimating Ferrite Content of Stainless Steel Weld Metal Welding Journal, American Welding Society, Vol 38, No. 7, July 1973, p. 293–s. | |
Schaeffler Diagram for Estimating Ferrite Content of Stainless Steel Weld Metal Metal Progress Data Book, American Society for Metals, Mid June 1977, p. 161. | |
Schoefer Diagram for Estimating Ferrite Content of Stainless Steel Castings (1980 | revision) Appendix of this practice. |
A351/A351M-24e1 | Standard Specification for Castings, Austenitic, for Pressure-Containing Parts (Includes all amendments and changes 2/3/2025). |
AWS A 4.2, | Procedures for Calibrating Magnetic Instruments to Measure the Delta Ferrite Content of Austenitic Stainless Steel Weld Metal Available from American Welding Society (AWS), 8669 NW 36 Street, #130, Miami, FL 33166-6672, http://www.aws.org. |
|