Steel product in the market may have different name with what we are study, some time they just called as general steel or black steel, hard steel we usually called as carbon steel or just alloy steel but actually between those steel have different name as we work in Industry or what we are already learn in college.
We are not talking about the composition of steel itself that more complicated to know and actually people just use steel like what usually use. User sometime only know of thin steel and thick steel, this is enough because they don't use this steel for critical use like structure or engine part that very dangerous if use any iron or just use waste steel.
Especially for stainless steel they just use origin stainless steel, they only talking about the originality not talk about stainless steel type because this is more difficult to test or showing to customer. To show the quality may be just use magnetic tool so if any stainless steel 304 they talk that this is nor origin stainless steel.
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