AWS A4.2M:2020

AWS A4.2M:2020

Standard Procedures for Calibrating Magnetic Instruments to Measure the Delta Ferrite Content of Austenitic and Duplex Ferritic-Austenitic Stainless Steel Weld Metal

213,40 €

Details

Calibration procedures are specified for a number of commercial instruments that can then provide reproducible measurements of the ferrite content of austenitic stainless steel weld metals. Certain of these instruments can be further calibrated for measurements of the ferrite content of duplex ferritic-austenitic stainless steel weld metals. Calibration with primary standards (non-magnetic coating thickness standards from the U.S. National Institute of Standards and Technology) is the preferred method for appropriate instruments. Alternatively, these and other instruments can be calibrated with weld-metal-like secondary standards. Reproducibility of measurement after calibration is specified. Problems associated with accurate determination of ferrite content are described
Scope : 1.1 This standard specifies the method and apparatus for the measurement of the delta ferrite content, expressed as Ferrite Number (FN), in largely austenitic and duplex ferriticaustenitic stainless steel1 weld metal through the attractive force between a weld metal sample and a standard permanent magnet

Zusätzliche Information

Autor American Welding Society (AWS)
Veröffentlicht von AWS
Document type Normen
Ausgabe 6
EAN ISBN 978-1-64322-130-4
ICS 25.160.20 : Schweißzusätze
Seitenzahl 52
Ersetzt AWS A4.2M:2006 (R2014) (ISO 8249:2000 MOD)
Schlagwort A4.2M, ,