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Glossary
316 Stainless Steel
Grade 316 stainless steel is an austenitic stainless steel specified under ASTM material specifications and known for its superior corrosion resistance compared to Grade 304 stainless steel. Like other austenitic steels, it contains chromium and nickel, but it also includes approximately 2–3% molybdenum, which significantly improves resistance to pitting, crevice corrosion, and chloride exposure.
The typical composition of 316 stainless steel includes about 16–18% chromium, 10–14% nickel, and 2–3% molybdenum. This alloy is often referred to as “marine grade stainless steel” due to its durability in saltwater, chemical, and harsh outdoor environments.
In fastener applications, 316 stainless steel is commonly used in marine, coastal, chemical, and outdoor structural settings where maximum corrosion resistance is required.