Editing The straight razor
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=== Metal === | === Metal === | ||
− | [[Image:Jimmyswybck1.jpg|thumb]] Pure iron is a relatively malleable metal which cannot be honed to get a sharp edge. | + | [[Image:Jimmyswybck1.jpg|thumb]] Pure iron is a relatively malleable metal which cannot be honed to get a sharp edge. Steel is an alloy of iron with a certain proportion of carbon. Higher carbon content makes steel harder, thus allowing a sharp edge to be produced, but at the same time making it more prone to breaking. Steels used for straight razor blades (and cutlery in general) typically have 0.5-1.5% carbon by mass. |
However, the carbon content is not the only factor which determines the properties of a steel. Other metals are usually present, either intentionally added or because they exist in the iron ore : nickel, vanadium, chromium, molybdenum are among the main "steel modifiers". In particular, stainless steel by definition contains at least 10% chromium.<ref>http://www.scientificamerican.com/article.cfm?id=why-doesnt-stainless-stee</ref> Many razors use stainless steel blades. The most obvious effect is that those blades are considerably more resistant to rus. Also, stainless steel razors generally can keep their edge longer, since the oxidation of the steel is slower. | However, the carbon content is not the only factor which determines the properties of a steel. Other metals are usually present, either intentionally added or because they exist in the iron ore : nickel, vanadium, chromium, molybdenum are among the main "steel modifiers". In particular, stainless steel by definition contains at least 10% chromium.<ref>http://www.scientificamerican.com/article.cfm?id=why-doesnt-stainless-stee</ref> Many razors use stainless steel blades. The most obvious effect is that those blades are considerably more resistant to rus. Also, stainless steel razors generally can keep their edge longer, since the oxidation of the steel is slower. |