Unlike regular steel, stainless steel does not stain, rust, or corrode. In the aviation industry, stainless steel is used for its corrosion resistant quality. Like all metal alloys there are different grades of stainless steel available, some of which are discussed below:
321 Stainless Steel
Type 321 Stainless Steel is similar to 304 Stainless Steel. The difference lies in the titanium content, which is five times that of the carbon content. This grade is very useful because of its insensitivity in nature to the intergranular corrosion that occurs when heated within 425-850oC of the carbide precipitation range. 321 Stainless Steel is used for products that may be exposed to temperatures greater than 900 degrees Celsius, and are combined with a resistance of scaling and high strength, which assists in avoiding any kind of deterioration to the product.
This grade is also modified and made into 321H stainless steel with a higher carbon content to provide more strength. However, it should be kept in mind that 321 Stainless Steel does not transfer itself well across a heat temperature arc and is therefore not considered suitable for activities like welding. For this, Stainless Steel with a grade of 347 is used, which consists of Niobium to provide the stabilisation of heat more quickly. This can be used to weld 321 stainless steel. Unfortunately, Grade 321 cannot be polished very well and is not good for aesthetic purposes.
Resistance Power of 321 Stainless Steel
Heat Resistance: Stainless steel products made with this grade of steel have good heat resistance and can tolerate heat as high as 900 degree Celsius and even to 925 degree Celsius. These products perform well in very hot conditions as they have a higher melting point and a greater threshold for heat. They are considered suitable for high-temperature structured applications and activities.
Corrosion Resistance: 321 Stainless Steel is resistant to potable water with 200mg/L chlorides at normal temperatures. This resistance reduces to 150mg/L at temperatures of 60oC.
Various Application of 321 Graded Stainless Steel
There are several different areas where this grade of stainless steel is used to get a successful output.
Heating Element Tubing
Air Craft Exhaust Modifiers
Furnacing of various parts
Welded screens for high temperature mineral processing
Jet Engine Parts
Forming of 321 Stainless Steel
321 Stainless Steel can be easily formed and easily drawn. However, higher pressures are required than for carbon steel and there is more springback. Like many other graded stainless steel sheets, work made from this grade of steel hardens and usually requires an annealing after the severe formation of the product. Products made with 321 Stainless Steel work more efficiently in comparison to other graded steel products and are universal in nature, meaning they are useful in daily activities, not just specialized ones.
321 Stainless Steel is a metal alloy made of Titanium or Niobium that is very heat resistant. This allows for exposure of the product to high temperatures with no damage. This grade of stainless steel is similar to 347 Stainless Steel and is used to provide intergranular corrosion after being heated to the maximum temperature.
A-286 Stainless Steel
A-286 Stainless Steel is an alloy that is designed for applications requiring maximum strength and good corrosion resistance. An advantage of this stainless steel is that it can be hardened or softened with the help of heat. In other words, A-286 Stainless Steel is a precipitation alloy that hardens by combining high strength and good corrosion resistance at temperatures up to 704 degrees Celsius. The type A-286 Stainless Steel is an iron-based super alloy, which is useful in manufacturing products that demand high strength. A-286 Stainless Steel is also useful for manufacturing products that require non-magnetic, high-strength material at fluctuating temperatures close to room temperature.
A-286 Stainless Steel is produced by AOD Refining, vacuum induction melting, vacuum arc, or re-melting of the electro-stat procedures. This kind of stainless steel is available in sheets, plates, and strips.
A-286 Stainless Steel is used in the manufacturing of aircrafts and industrial gas turbines, jet engines, super charger components, blades, frames, castings, sockets, screws, and after-burner parts.
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