Stainless steel is a common choice for boat parts because stainless steel is strong and visually attractive and it resists corrosion. Because stainless steel contains significant amounts of chromium, it naturally resists rust and does not need paint or other treatment before use.
Because all stainless steel is flexible, it can resist corrosion and cracking from the temperature variations that boats commonly encounter. Its natural flexibility makes stainless steel easy to manufacture into various boat parts. Because stainless steel is strong and versatile, it costs less to maintain than other metals. It is naturally heat-resistant so it is less likely than other metals to succumb to extreme temperatures or fires, making it an attractive choice for boat manufacturers.