Oversimplifying it alot:
Iron + Carbon --> High Carbon Steel
High Carbon Steel + Chromium & other surface alloy metals --> Stainless Steel
Basically Stainless Steel is ordinary Steel with a surface Chrome Steel layer protecting it from corrosion.
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The improvement from iron to stainless steel is that another metal alloy had been created. This new alloy allows for improvements to life in general since it has other uses than that of ordinary iron. Surgical instruments come to mind, they would not exist as we know them without the evolution of metallurgy which made stainless steel and many other useful alloys possible.
Steel is a composition of (primarily) Carbon and Iron. The more carbon, the harder, less ductile the steel. Stainless steel is Carbon, Iron and Chromium, that is galvinized (diped into zinc, which corrodes the outer layer of stainless steel,) making it stainless.
Chromium
In some cases yes. If the stainless steel was not passified (removing iron particles left on stainless steel by contact with tool steel dies) with nitric or sulfuric acid then yes.
Iron (Iron is the only pure metal that rusts, all other metals corrode)
The improvement from iron to stainless steel is that another metal alloy had been created. This new alloy allows for improvements to life in general since it has other uses than that of ordinary iron. Surgical instruments come to mind, they would not exist as we know them without the evolution of metallurgy which made stainless steel and many other useful alloys possible.
Stainless steel is stronger and retards rust unlike iron
The elements that make up stainless steel are nickel, iron,chromium and manganese.
Stainless steel is rust resistant; iron rusts easily. A stainless steel water gate will last longer than an iron one.
stainless steel
No; steel is an iron-carbon alloy. Stainless steel is an alloy of steel with chromium added. Stainless steel is usually 13-25% chromium (by weight).
Chrome is used with iron to create stainless steel alloys.
It is iron and add 0.5 percent of carbon for making stainless steel.
Good quality stainless steel should never rust. I have noticed that the high iron content in our water causes red particles of iron oxide to remain on stainless steel vessels - and it looks exactly like rust but its just the iron in the water drying out on the stainless steel.
By adding other metals like chrome and nickel to the mix. the resulting alloy is the strongly corrosion resistant.
Stainless Steel; all other choices are elements - stainless steel is a steel alloy (composite elements).
Yes, stainless steel is an iron-carbon alloy with a minimum of 11.5 wt% chromium content. Many of the common grades of stainless steel such as AISI 304, 316, 316L also have greater than 5% Nickel added. It improves the high temperature performance and stabilizes the austenite phase.