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chemical property
Stainless steel is a material that is the result of an alloy of chromium, iron, and carbon. The ability for stainless steel materials to resist rust is a chemical property.
Folded and Damascus steels are not stainless, so yes; if not maintained, will rust.
ability to rust is a chemical property
No. Most modern damascus steels are composed of various other steels such as 1084,O1 toolsteel, etc..forge welded together. There is stainless damascus, but even it can rust.
Rusting is a chemical process, so no if its lacking it cannot be chemical its physical
The ability to rust is a cheical property because the composition of the reactants have changed chemically.
Stainless steels, zirconium, titanium, gold, platinum metals, other metals; glass, ceramics, wood, textiles, etc.
The benefits of stainless steel materials are that they will not rust as other steels would. Additionally, steel is a lot more common than some other metals.
Stainless steel has a different metals which help reduce corrosion or rust when placed in water for a length of time. As opposed to high carbon steel. It is preferred by Health Inspectors throughout the United States.
rust
It depends on the type of stainless steel you are referring to. Austenite and ferritic stainless is not heat treatable in which case carbon steel could be made far harder. However..martensitic stainless steels are heat treatable in which case they could be made harder depending on the alloy contents. Generally the more carbon a steel contains, the harder it can be made. Chromium; a key ingrediant in stainless steels, can also increase hardenability.