The properties of structural steel result from both its chemical composition and its method of manufacture, including processing during fabrication. Product standards define the limits for composition, quality and performance and these limits are used or presumed by structural designers.
The SAE steel grades system is a standard alloy numbering systems for steel grades maintained by SAE International.. In the 1930s and 1940s the American Iron and Steel Institute (AISI) and SAE were both involved in efforts to standardize such a numbering system for steels.
Nearly everyone has heard of stainless steel or has used it in some way, shape or form throughout their life, but not everyone knows what it is, how it's made, how it's used and the advantages of choosing it over other types of materials.