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Ferritic Stainless Steel Chemical Composition, Grade Chart, Tables and Documents

Ferritic stainless steel features chromium as the main component, generally from 10.5% to 27%, with practically no nickel presence. This is the way in which it gets oxidation resistance. This is typical in the environments with relatively low oxygen amount of amount. The commonly utilized ones are the grades such as 409, 430, 439 which differ in their characteristics and capabilities to suit different uses. The chart depicts all of these grades on a chart and explains their structural properties, kinds and performance specifications with one exception that there aren’t any world-wide standards for grades' nomenclature. A set of tables clarifying their corrosion resistance, weldability, and thermal expansion will help a lot to make decision on the material. Also, it shows you the process standards, heat-treatment commands and the procedures about cutting, fabricating and machining. Chemical composition, grades and associated documents detail to engineers and manufacturers' the desired ferrous-grade ferritic stainless steel quality.

Ferritic Stainless Steel Chemical Composition Table

Ferritic stainless steel is an alloy chemical composition that is an exceptional material as it is distinct from most metallic alloys. In most cases, it contains iron with chromium as the primary alloying additive, which can be a percentage of between 10.5 and 27, from one end of the spectrum to another. The carbon level is often kept as low as 0.12% whereas elements such as manganese and silicon are added in varying amounts to provide some specific properties. Other times, elements like molybdenum and nitrogen may also be included if the steel needs some special capabilities. Therefore, the structure of ferritic stainless steel involves the formation of a film or coating which allows for its corrosion resistance, high-temperature strength, and magnetic properties, all of which make it suitable for application in industries and consumers.

Ferritic Stainless Steel Composition Table
Group AISI designation C Cr Mo Other
1 410S 0.08 12 - -
1 409 0.03 11 0.5 Ti -
2 430 0.08 17 - -
2 430Nb 0.05 17 0.6 Nb -
3 430Ti 0.05 17 0.6 Ti -
4 434 0.08 17 1 -
4 444 0.02 18 2 0.4 (Ti+Nb)
5 446 0.15 24 - -
5 447 0.01 29 3.8 0.1Cu, 0.1Ni

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