-Low-alloy steels are more expensive than carbon steels because they contain between 1%-5% of other metals such as nickel, titanium,chromium, tungsten and manganese
-Each of these metals give steel that is well suited for a particular job, e.g. nickel steel alloys are used to build long-span bridges, bicylce chains and military armour-plating, becuase they are very resistant to stretching forces
-Tungsten steel operates well under very hot conditions so it is used to make high-speed tools
-High- alloy steels are even more expensive because they contain a much higher percentage of other metals
-E.g. chromium steels have between 12% and 15% chromium mixed with iron, and often nickel is mixed with it too, this provides strenght and chemical stability
-These chromium nickel steels are more commonly known as stainless steels, we use them to make cooking utnesils and cutlery, they are also used to make chemical reaction vessels becuase they combine hardness and strenght with great resistance to corrosion
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