Choosing the Right Stainless Steel Shim Grade for Turbines

Not all stainless steel shims perform the same way, especially in the demanding environment of a power plant. Grades like 304, 316, and 301 each have their own strengths. SS 304 shims offer excellent corrosion resistance and are widely used for standard turbine environments. SS 316 shims take it a step further—they are the best option for coastal power plants where chlorides in the air can cause corrosion. SS 301 shims provide flexibility and high tensile strength, ideal for assemblies requiring slight bendability.

Selecting the correct shim grade affects turbine efficiency, maintenance intervals, and long-term equipment stability. If your plant deals with chemicals, seawater exposure, or high humidity, 316-grade stainless steel shims are the most reliable choice. When cost-effectiveness and general durability are priorities, 304-grade shims deliver strong performance. Understanding these differences ensures your alignment process remains accurate and safe.