What is stainless steel?

'Stainless' is a term coined early in the development of these steels for cutlery applications. It was adopted as a generic name for these steels and now covers a wide range of steel types and grades for corrosion or oxidation resistant applications.
Stainless steels are iron alloys with a minimum of 10.5% chromium. Other alloying elements are added to enhance their structure and properties such as formability, strength and cryogenic toughness. These include metals such as:

Nickel
Molybdenum
Titanium
Copper
Non-metal additions are also made, the main ones being:
Carbon
Nitrogen

The main requirement for stainless steels is that they should be corrosion resistant for a speci...

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