Unprecedented galling resistance test results

- after Expanite surface hardening

Galling, or adhesive wear, is a pervasive problem for stainless steels, of which the soft austenitic alloys are notoriously prone. In an on-going effort to increase its database of engineering data, Expanite recently conducted the ASTM G98 Standard Test Method for Galling Resistance of Materials on AISI 316L, with and without Expanite surface treatment. The results were remarkable, and challenge the conventional wisdom that a 'hardness differential' in a material couple is required to resist galling.

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