Materials Science : Properties of Stainless Steel Quiz

*Theme/Title: Properties of Stainless Steel
* Description/Instructions
Stainless steel is a metal alloy, made up of steel mixed with elements such as chromium, nickel, molybdenum, silicon, aluminum, and carbon. Iron mixed with carbon to produce steel is the main component of stainless steel.

Chromium is added to make it resistant to rust. The addition of nickel enhances corrosion resistance properties in case of aggressive usage. The addition of molybdenum gives localized corrosion resistance against scarring. Other alloying metals like copper, titanium and vanadium are also added in order to improve the properties and structure of stainless steel. In all, there are more than 150 grades of steel, but only 15 are used regularly.

Stainless steel is preferred for making kitchen utensils because it does not affect the flavor of food and is easy to clean. It is used to manufacture cookware, surgical instruments, plates, sheets, bars, wire, kitchen cutlery, industrial equipment, building construction materials and hardware. It is also used in commercial kitchens and food processing plants.

Stainless steel is a hard and strong substance, it is not a good conductor of heat and electricity, it is ductile, magnetic, retains its strength and cutting edge regardless of temperature. There are five major types of stainless steel: Ferritic, Martensitic, Precipitation Hardening, Austenitic and Duplex.

Ferritic stainless steel contains 30% chromium that has a crystal structure. It is known to have ferromagnetic properties as well as malleability and ductility. Ferritic stainless steel lacks in high-temperature mechanical properties.

Martensitic stainless steel is a mixture of carbon and 18% chromium. It can be hardened by heat treatments. It is known to have ferromagnetic properties and less corrosion resistance.

Precipitation Hardening stainless steel contains a mixture of nickel and chromium. It is very strong.

Austenitic stainless steel is formed by using nitrogen, manganese and nickel. It contains about 16-26% of chromium and less than 35% nickel. Austenitic stainless steel is tough, ductile with cryogenic and high temperature strength properties.

Duplex stainless steel constitutes a combination of austenite and ferrite crystal structures. Chromium and nickel are the main alloying elements in duplex stainless steel. It is corrosion resistant.

For the following quiz, review the above summary to assist you in answering the question. Select the best choice from the given answers.

Group: Science Science Quizzes
Topic: Materials Science

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