How to evaluate intergranular corrosion in stainless steels

Stainless steels are widely used in almost every industry, and they work quite well when heat treated properly. However, when improper heat treatment occurs they are susceptible to intergranular corrosion (IGC), which can lead to problems and premature failure. Unfortunately, there is no visual or NDE method that can reliably find intergranular corrosion. ASTM established the A262 corrosion test to find intergranular corrosion before the materials go into use. In critical applications, IGC testing by A262 may be required for every batch of materials.

Often A262 Method A is used first as a quick screen to see if the steel is susceptible to integranular corrosion. If the steel fails Method A, then one of the other methods (B, C, E, or F) are selected depending on the alloy and other considerations. G2MT Labs provides ASTM A262 testing along with the metallurgical and corrosion expertise to help you with any issues that may arise.

A923 Testing of Duplex Stainless Steels by G2MT Labs

ASTM Corrosion Testing of Duplex Stainless Steels by G2MT Labs

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