Steel Elbow

stainless In metallurgy, it refers to alloy steel with high chromium content (usually 12%~30%) that exhibits passivation, corrosion resistance, and non rusting in the atmosphere and corrosive media such as acid, alkali, and salt. It usually also contains elements such as nickel, molybdenum, vanadium, manganese, and tungsten;
The most important metal element that determines the rust prevention ability of stainless steel is chromium.
Internationally defined by weight, stainless steel is an alloy steel with a minimum chromium content of 10.5wt% and a maximum carbon content of 1.2wt%, or a "ferroalloy" with a chromium content exceeding 10%.
This name comes from the fact that it is not as easily corroded and rusted as ordinary steel