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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[johndelper]

Nothing but the facts... thanks for making it quick and understandable.

[Nimomala]

Thanks for the videos sir.The videos are so much helpful to understand the metallurgy concepts.

[giorgossix]

Thanks for the interesting video.
I’d like to ask what is the case with an inox AISI 304 plumbing grill thats used for bathroom floors or bath tubs? Is it safe for not rusting, or any sign of deterioration?

[garystandke]

I think austenite, martensite, and ferrite are crystal types related to carbon steel, not types of stainless steel.

[engchoontan]

consumer grades of stainless steel commonly used to make house-hold utensils
= feng-shui news
= when and where(placement) deteriorate
= rate of deterioration
= ability to recover
= tarnish, radioactive tarnish, concentration of dross to some spots before becoming spotless.

[ronsreadyornotshop]

would have watched more of it, the background music was too much.