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Glossary
18/8 Stainless Steel
18/8 stainless steel is a common industry term that describes the chemical composition of austenitic stainless steel rather than a specific standardized grade. The designation refers to a composition containing approximately 18% chromium and 8% nickel, which provide good corrosion resistance.
Although 18/8 is not a formal grade defined by ASTM material specifications, it is widely understood and treated across the fastener industry as a grade designation. In practice, fasteners sold as 18/8 stainless steel are most often manufactured from Grade 304 stainless steel or a closely related alloy that falls within the same composition range.