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Steels shaped by casting method are known as cast steels.Mechanical properties of cast product are inferior as compared to wrought product of same steel.Two important factors,i.e.production of complicated shapes and production of less quantity economically give an edge to the casting process.
Wrought steels are shaped by plastic deformation(mechanical working).View examples of the ornamental wrought iron railings, fences, gates, spiral staircases .This name of steel is given on the base of fabrication.
Austenitic stainless steels offer excellent weldability, but austenite isn't stable at room temperature. Consequently, specific alloys must be added to stabilize austenite. The most important austenite stabilizer is nickel, and others include carbon, manganese, and nitrogen.
Ferritic stainless steels have 12 to 27 percent chromium with small amounts of austenite-forming alloys.
Martensitic stainless steels make up the cutlery grades. They have the least amount of chromium, offer high hardenability, and require both pre- and postheating when welding to prevent cracking in the heat-affected zone (HAZ).
For the most part, we're talking about stainless steel here, the most important commercial high-alloy steel. Stainless steels are at least 12 percent chromium and many have high nickel contents. The three basic types of stainless are: Austenitic Ferritic Martensitic.
Their carbon content is usually below 0.25 percent and often below 0.15 percent. Typical alloys include nickel, chromium, molybdenum, manganese, and silicon, which add strength at room temperatures and increase low-temperature notch toughness.
These steels usually are iron with less than 1 percent carbon, plus small amounts of manganese, phosphorus, sulfur, and silicon. The weldability and other characteristics of these steels are primarily a product of carbon content, although the alloying and residual elements do have a minor ...
