Stainless steel can contain Fe, Cr, Ni, V, Mn, C, Si.
Stainless Steel; all other choices are elements - stainless steel is a steel alloy (composite elements).
The elements that make up stainless steel are nickel, iron,chromium and manganese.
Stainless steel is an Alloy steel because it contains chromium as an alloying element - steels without alloying elements are called carbon steels.
iron chromium nickel carbon
nickel,iron,chromium,manganese
Important alloying elements in stainless steel are chromium, nickel, vanadium, molybdenum.
Many people use steel and stainless steel, perhaps stainless steel welding wire to make cheap resistance heating elements.
A steel is considered to be stainless if it contains a minimal of 13% chromium.
Alloying steel with other elements is how you MAKE CRS (Stainless steel) to begin with. CRS means 'Corrosion-Resistant Steel'.Alloying is a way to use the best parts of several elements together in one material.------------------------------The alloy stainless steel is made up of iron (70%), chromium (20%) & nickel (10%). Iron on its own corrodes, but turning it into the alloy stainless steel means that the alloy doesn't corrode.
However stainless steel and steel are not part of the European REACH directive (1907-2006-EC) there seem to be some examples of CAS numbers for stainless steel, however this looks more like a individual initiative from the supplier / producer. Example: CAS 7439-89-6 ThyssenKrupp Stainless Steel is not a chemical substansion as meant by REACH, but a product with several chemical elements. These elements do have a CAS number.
The alloy is a ferritic stainless steel.
Surgical instruments are made from stainless steel.