Stainless steel is an iron and chromium alloy.

While stainless must contain at least 10.5% chromium, the exact components and ratios will vary based on the grade requested and the intended use of the steel.

Other common additives include:

Nickel

Carbon

Manganese

Molybdenum

Nitrogen

Sulfur

Copper

Silicon

The exact composition of an alloy is strictly measured and assessed throughout the alloying process to ensure the steel exhibits the required qualities.

The common reasons to add other metals and gasses to a stainless steel alloy include:

Increased corrosion resistance

High temperature resistance

Low temperature resistance

Improved strength

Improved weldability

Improved formability

Controlling magnetism

What’s in your stainless steel isn’t the only factor in determining its unique characteristics however…

How it’s made will further alter the steel’s properties.