What is stainless steel from?

Stainless steel is a type of alloy primarily composed of iron, chromium, and sometimes other elements such as nickel, molybdenum, and manganese. The term "stainless" refers to its ability to resist staining, corrosion, and rust due to the presence of chromium, which forms a thin protective oxide layer on the surface of the steel when exposed to oxygen.

The basic composition of stainless steel includes:

1. Iron: The primary component, providing the structural strength of the alloy.
2. Chromium: The essential element that imparts corrosion resistance. Chromium content typically ranges from around 10% to 30% in stainless steel alloys.
3. Nickel: Often added to enhance both corrosion resistance and mechanical properties, such as toughness and ductility.
4. Molybdenum: Sometimes included in certain stainless steel grades to further improve corrosion resistance, particularly in aggressive environments.
5. Manganese: Added in varying amounts to improve the alloy's workability, strength, and corrosion resistance.
6. Carbon: Present in small quantities, carbon content affects the hardness and strength of the steel.
7. Other elements: Depending on the specific stainless steel grade and its intended use, other elements like titanium, copper, and nitrogen might be added to achieve specific properties.

There are various types and grades of stainless steel designed for different applications, ranging from household items like kitchen utensils and appliances to industrial equipment and structural components. The exact combination of elements and their proportions in the alloy determine the steel's specific properties, making it suitable for a wide range of uses where corrosion resistance, strength, and durability are essential.