![]() For excellent pricing, service, and products – including stainless steel screws - contact us today. Marsh Fasteners specializes in stainless steel products that are made to withstand extreme environments and resist rust and corrosion. Rust resistant stainless steel screws are meant for outdoor projects such as decks, sheds, and outdoor furniture. Just because stainless steel screws are super strong and resistant to rust and other corrosion does not mean that you have to use them. These are listed in order of corrosion resistance, with 316 best suited to severe or marine environments – including if you live within 20 miles of a beach! When Are Stainless Steel Screws Needed? Austenitic stainless steel includes grades 18-8 (303 and 304), 305, and 316. This built-in fortification outperforms an outer layer of protection as found in galvanized screws.īear in mind that the grade of stainless steel affects its rust resistance. The rust resistance supremacy of stainless steel screws results from the addition of chromium when the steel is in its molten state. Moreover, this protective shield of chromium oxide re-forms if damaged. However, its chromium content reacts with the oxygen to form protective properties that make stainless steel highly resistant to rust and other forms of corrosion. But copper, for example, does corrode.īecause stainless steel is an alloy containing iron-based metals, it is not strictly rust proof. Other pure metals like gold and copper contain no iron, so they don’t rust. Platinum doesn’t corrode, rust, or tarnish. What Gives Stainless Steel its Rust Resistance Supremacy?īefore we go any further, let’s clear up a misconception. The orange-brown discoloration indicating corrosion of iron and iron alloys is called rust. Corrosion is a broad term describing the deterioration of a metal by oxidation or other chemical action.
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