ASTM E 1312 : 2018

1.1 This practice covers procedures for eddy current examinationof hot ferromagnetic bars above the Curie temperaturewhere the product is essentially nonmagnetic, but below2100 °F (1149 °C).1.2 This practice isintended for use on bar products havingdiameters of 1⁄2 in. (12.7 mm) to 8 in. (203 mm) at linearthroughput speeds up to 24 000 ft/min (122 m/sec). Larger orsmaller diameters may be examined by agreement between theusing parties.1.3 The purpose of this practice is to provide a procedure forin-line eddy current examination of bars during processing forthe detection of major or gross surface discontinuities.1.3.1 The types of discontinuities capable of being detectedare commonly referred to as: slivers, laps, seams, roll-ins(scale, dross, and so forth), and mechanical damage such asscratches, scores, or indentations.1.4 This practice does not establish acceptance criteria.They must be specified by agreement between the usingparties.1.5 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.6 This practice does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this practice to establish appropriatesafety, health, environmental practices and determinethe applicability of regulatory limitations prior to use.1.7 This international standard was developed in accordancewith internationally recognized principles on standardizationestablished in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations ssued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.