The Ultimate Guide To Understanding Steel Grades

The steel grade is a classification of various steels based on their composition and physical properties.

There are over 3,500 different grades of steel. These grades can be split into four main categories.

* Carbon steel.

* Stainless steel.

* Alloy steel.

* Tool steel.

Steel can also be classified by several different factors such as;

1. Composition ( carbon range, alloy etc).

2. Finishing method ( hot rolled, cold rolled, etc).

3. Production method ( electric furnace, continuous casting etc).

4. Microstructure ( ferritic, pearlitic, martensitic, austenitic, etc)

5. Heat treatment (annealed, tempered, normalized), etc.

- STEEL NUMBERING SYSTEM.

The steel industry uses two major numbering systems to classify steel grades. The American Iron And Steel Institute (AISI) and Society Of Automotive Engineers ( SAE) systems.

Specifications such as those issued by AISI and SAE, provide a standard language for engineers, fabricators, and consumers to communicate the properties of steel.

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