Different material selection procedures exist for stainless steel in infrastructure applications. The most common is the EN 1993-1-4: 2015 (Eurocode 3)–Annex A, which is applicable to all of Europe. The guideline can be used to reduce necessary testing time, but they do not describe the behaviour of stainless steel under practical conditions. The atmospheric corrosion resistance of stainless steel depends on the material-related parameters and environmental conditions. The atmospheric corrosion performance of stainless steel grades in a marine environment in Genoa, Italy, was investigated by conducting an atmospheric field test exposure program. The result shows that the test station in Genoa, Italy, can be characterized as a marine environment with a medium corrosivity class (C3 for carbon steel and zinc) following ISO 9223. Following the EN 1993-1-4: 2015 (Eurocode 3)–Annex A, the test site's Corrosion Resistance Class (CRC) is CRC IV. In the marine environment in Genoa, Italy, high-Cr stainless steel, such as grades S82441 and S32205, should be used for adequate atmospheric corrosion resistance for infrastructure materials. The field test results illustrate the application of stainless steel structures. The result also provide data for future revisions of EN 1993-1-4: 2015 (Eurocode 3)–Annex A regarding material selection.