Stainless steel materials are chosen for high-purity gas systems due to their corrosion and oxidation resistance. 316L stainless steel is widely used because it can withstand intergranular corrosion after welding or stress relief. To ensure the performance of fluid products, controlling the material composition and impurities is a key factor, directly affecting the ductility, corrosion resistance, and post-welding properties of the processed fluid products.

1. Chromium (Cr) - High-chromium Cr content offers excellent oxidation and corrosion resistance, ensuring a thicker chrome oxide layer on the stainless steel surface and enhancing its corrosion resistance.

2. Nickel (Ni) - High elongation nickel content stabilizes the Austenitic structure, ensuring the stainless steel maintains its elongation across a wider temperature range and various fluid media.

3. Carbon C - Low carbide content of Carbon C can prevent intergranular corrosion and also inhibit the precipitation of carbides after welding.

4. Sulfur S - Welding performance, low sulfur content with low sulfur sulfide, and sulfur S content within a narrow range in the material ensures a weld bead shape without indentation or bulging, achieving true full penetration on the inner wall during welding. This is an essential requirement for high-purity applications. Consistent semiconductor-grade welding quality is necessary to meet the high-quality construction requirements of semiconductor engineering projects.