Contains a minimum of 11% chromium
Is a ferrous alloy (contains iron)
High tensile strength
Stainless steel comes in a variety of grades. The grades are classified by a series number and assigned a numerical grade. The numbers classify the grades of steel based on their composition, physical properties, and applications. The most popular grades are 304 stainless steel and 316 stainless steel.
Non-ferrous alloy (doesn’t contain iron)
Due to its low tensile strength, aluminum is commonly alloyed with other metals to give it a number of different superior properties. Some of the most common aluminum alloys are 3003 aluminum and 3004 aluminum.