ANSI/AWS A4.2M:2006
Standard Procedures for Calibrating Magnetic Instruments to Measure the Delta Ferrite Content of Austenitic and Duplex Ferritic-Austenitic Stainless Steel Weld Metal

Standard No.

ANSI/AWS A4.2M:2006

Release Date

2006

Published By

American National Standards Institute （ANSI)

Status

Withdraw 2006-01

Latest

ANSI/AWS A4.2M:2006

Scope

Specifies the calibration procedures for a number of commercial instruments that can then provide reproduceble measurements of the ferrite content of austenitic stainless steel weld metals. Some 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 (nonmagnetic coating thickness standards from the U.S. National Institute of Standards and Technology) is the preferred methods for appropriate instruments. Alternatively, these and other instruments can be calibrated with weld-metal-like secondary standards.

ANSI/AWS A4.2M:2006 history

• 2006 ANSI/AWS A4.2M:2006 Standard Procedures for Calibrating Magnetic Instruments to Measure the Delta Ferrite Content of Austenitic and Duplex Ferritic-Austenitic Stainless Steel Weld Metal