the world's best ME on stainless (TXT experiment)

from the world's best mechanical engineer (experiment) ***

Fwd: Most cutlery is made of 400 series stainless steel, usually 420. 400 series stainless is magnetic. Most stainless steel objects you come in contact with are 300 series which is NOT magnetic. The main chemical difference is there is no nickel in the 400 series steels. The main functional difference is 400 series steels can be made pretty hard so they are good for silverware but they have mediocre corrosion resistance. The 300 series steels have superior corrosion resistance but don't heat treat well.