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| Q. |
Stainless steel is an alloy of - |
| A. | chromium and carbon |
| B. | chromium, carbon and iron |
| C. | chromium and iron |
| D. | carbon and iron |
| Answer» B. chromium, carbon and iron | |
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Explanation: Steel is an alloy made by combining iron and other elements, the most common of these being carbon. When carbon is used, its content in the steel is between 0.2% and 2.1% by weight, depending on the grade. Other alloying elements sometimes used are manganese, chromium, vanadium and tungsten. Stainless steel s defined as a steel alloy with a minimum of 10.5% to 11% chromium content by mass. Stainless steel differs from carbon steel by the amount of chromium present. |
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