Alloy Steels : Nickel, Chromium, Chrome Vanadium, Tungsten, Manganese steel - Printable Version

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Alloy Steels : Nickel, Chromium, Chrome Vanadium, Tungsten, Manganese steel - sumit patni - 07-26-2014

Nickel Steels

These steels contain from 3.5% nickel to 5% nickel. The nickel increases the strength and toughness of these steels. Nickel steel' containing more than 5% nickel has an increased resistance to corrosion and scale. Nickel steel is used in the manufac­ture of aircraft parts, such as propellers and airframe support members.



Chromium Steels

These steels have chromium added to improve hardening ability, wear resistance, and strength. These steels contain between 0.20% to 0.75% chromium and 0.45% carbon or more. Some of these steels are so highly resistant to wear that they are used for the races and balls in antifriction bearings. Chro­mium steels are highly resistant to corrosion and to scale.

Chrome Vanadium Steel

This steel has the maximum amount of strength with the least amount of weight. Steels of this type contain from 0.15% to 0.25% . vanadium, 0.6% to 1.5% chromium, and 0.1 % to 0.6% carbon. Common uses are for crankshafts, gears, axles, and other items that require high strength. This steel is also used in the manufacture of high-quality hand tools, such as wrenches and sockets.




Tungsten Steel

This is a special alloy that has the property of red hardness. This is the ability to continue to cut after it becomes red-hot.

Because this alloy is expensive to produce, its use is largely restricted to the manufacture of drills, lathe tools, milling cutters, and similar cutting tools.



Manganese Steels

The amount of manganese used depends upon the properties desired in the finished product. Small amounts of manganese produce strong, free-machining steels. Larger amounts (between 2% and 10%) produce somewhat brittle steel, while still larger amounts (11% to 14%) produce a steel that is tough and very resistant to wear after proper heat treat­ment. Railroad tracks, for example, are made with steel that contains manganese.

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