GB/T 40393-2021 specifies accelerated test methods for assessing the susceptibility to intergranular corrosion of austenitic stainless steels, applicable to various products such as double-layer rolled metals, welded joints, and deposited metals. The standard defines two test methods, both requiring a specific corrosive solution in the presence of metallic copper, utilizing corrosion-resistant test vessels equipped with condensers, along with specimen processing equipment, surface roughness measuring instruments, and nitric acid cleaning reagents. By controlling parameters such as boiling duration of the solution and combining post-test bending inspections and surface observations, the susceptibility of materials to intergranular corrosion is rapidly evaluated, providing an efficient detection basis for material quality control.
| Status | Active | ||
|---|---|---|---|
| CCS | H25 | ICS | 77.060 |
| Release Date | 2021-08-20 00:00:00 | Implementation Date | 2022-03-01 00:00:00 |
