STEEL - CLASS 2

STEEL ARCHITECTURE

Welcome back!. 
Here is what we saw in the second class 👇

Steel is an ALLOY of iron. Of course its not available naturally, its made. 

RESOURCE :

The raw materials which are being processed to obtain steel are
Iron ore, Coke (fuel ), Limestone

Next step is to put these materials in random machines, process them, and finally get the product STEEL. We learnt 2 kinds of processes involved in making steel.

 OXYGEN PROCESS AND ELECTRIC ARC FURNACE PROCESS:

The former process is done by inducing pressurized oxygen into a furnace, which already contains pig iron. And thus we get steel in the melted form and of course this process produces a lot of heat. 

The latter process is done using electric current where carbon electrodes are used to obtain steel. This method produces stainless steel. 

Yay. Steel is now produced. Now, what properties do they have? Lets see. Trust me, knowing about steel is interesting!.😁

Firstly, we looked at some words - Plastic deformation, elasticity, ductility, brittle, hardness, compression and tension. Familiar ones right? 
But the representations of what the words mean, through basic yet understandable illustration, is the highlight. 

PROPERTIES :

Plastic deformation and Elasticity : A material which loses its form due to the application of load or pressure and never regain the shape, is said to have more plasticity property. A material which regains its form even after application of load or pressure, is said to have more elastic property. Technically, steel has good elastic property.

Ductility: Anything that can be drawn into wires is ductile. Its the property of a material to change its form without breaking. Steel has good ductile property as it can be drawn to any form. 

Hardness: A material which can withstand a lot of pressure or force, but still does not break, consider it as a hard material. Steel is hard. 

Tension: When a material is pulled on either sides, but does not deform, it has good tensile strength. Steel is known for its tensile property. 

We are now known with the manufacture process and properties. How do people say that these are the properties of the material?  Yeah, they do tests. Lets look into what test they do for steel!.

TESTS:

Rockwell hardness test - To test the hardness of the material by pressing it.
Brinnel test - ???
Vicker test - ??? ( Yet to know what these are )

We ended the session by discussing the advantages and disadvantages of steel. Also argued on whether the material is sustainable or no. A detailed blog on "my thoughts about steel", will be uploaded soon. 

Until then, 
Bye. 👋

NANDHINI.P










 

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