Thermo Mechanically Treated (TMT) process has been developed for providing quality reinforcement to structures. The TMT process is a revolutionary process as it provides the steel bars high tensile strength as well as ductility. There are different grades for TMT reinforced steels namely Fe 415, Fe 500, Fe 550, Fe 600, where the numbers denote the minimum yield strength.
The previous blog explained about the evolution of steel using different techniques and also how it changed the economic status of the world. Steel is mainly preferred as reinforcements due to their high tensile strength. In earlier times Iron bars was used as reinforcement but it became unsuitable due to formation of corrosion very quickly. It was replaced by Mild Steel (MS) reinforced bar. Even though Mild Steel rebars has good workability, ductility and anti corrosion properties, it has poor bonding with concrete since it’s outer surface is smooth.
Steel has been a vital tool for mankind since its inception. Steel is the major component in almost everything starting from buildings, bridges, automobiles to pieces of machinery. Discovery of steel and it’s production dramatically changed the economic status of the world. Steel is an alloy of Iron and Carbon in which the carbon content is at 2% (Above 1%, it is classified as Cast Iron).
Soft core in a hard shell – If TMT Bars had a tagline, this would be an apt one. TMT bar is an integral part of construction and it determines the strength and durability of a building. Most of us rummage shops after shops tirelessly looking for the best home decor stuff to adorn the interiors of our homes. How more choosy and smart should we be before buying TMT Bars for our construction purposes? Read ahead to have an idea about what a common man should know before buying TMT bars.
Home is where the heart is. Home is where you crave to come back to after a long day – to unwind, relax and be yourself. While your house matters more to you than the monetary worth it holds, have you thought of what makes your house a safe place to live in. Well. bricks, mortar and everything nice – a probable answer . But there is something beyond just bricks and mortar that makes a building safe place to live in – TMT bars! Of all the grades of steel available in the market, Fe415 steel grade is proven to be the best. Here is why you should consider using it for your home.
House is every common man’s dream. It is not just a shelter, but a place filled with fond memories. So every home must be durable and strong to withstand adverse conditions and protect the loved ones. Concrete is the most widely used material for constructing. It provides high compressive strength, but low tensile strength. Due to this factor, concrete would fail from tensile stresses. All concrete structures will crack to some extent, due to shrinkage and tension, therefore it needs reinforcement.
My previous blog explained the stages of manufacturing TMT steel bar grade Fe 415 and special TMT grades bars. Did you know that Fe 415 is called a true grade TMT steel bar?
Have you wondered why Fe 415 is the true TMT grade?
It’s the original TMT bar that provides an optimum high tensile strength and ductility and by changing its manufacturing process slightly, produces different variations with higher strengths but less ductility TMT bars called the special TMT bars such as Fe 500, Fe 550, Fe 600.
Nowadays TMT steels are commonly used in constructions. What is TMT? Why is it used than other types of steel? Well, before TMT was introduced Mild Steel (MS) bars, Cold Twisted Deformed (CTD) bars were primarily used with concrete for constructing buildings. Those steel were graded Fe 250 but their low strength was a problem for buildings requiring more strength.
This is two of the most used TMT bars when it comes to building homes in India and the average homeowners have a tough time getting their heads around to knowing their difference. So let’s begin with basics itself. Fe stands for Iron, the numbers 500 and 415 is their tensile strength and the ”D” stands for ductility. Here the word signifies the extra ductility which is generally not found in Fe 500. So why would steel companies go to the trouble of making a new grade of TMT bars instead of just promoting Fe 415? In this blog, we will try to find an answer for this conundrum.
First things first, these TMT bars are completely different due to the differences in their manufacturing process. It is where they are used is where the confusion arises. Fe 415 is a fan favourite among the average homeowner and Fe 500 is the choice for home contractors, this is mainly due to their combination of strength and ductility. Fe 500D seems to solve the problem of choosing between either strength or ductility. Fe 500 is perfect medium and small-sized commercial buildings as well as homes, and the Fe 500D can be used to construct both them, the versatility gives the Fe 500D an advantage of over Fe 500 but not over Fe 415.
Fe 415 is naturally more ductile than Fe 500D, while Fe 500D may seem like a combination of strength and ductility, it actually compromises between them. With Fe 415 homeowners get more ductility which can withstand earthquakes and other natural disasters. Fe 415 with its superior ductility can be made into shapes such as columns, slabs and other shapes. Fe 415 can be easily bent without needing the use for any bar bending and bar cutting machines as well. This significantly reduces the cost associated with building a home.
Continuing from the previous blog, we will be taking a close look at how TMT bars changed Indian construction sector. One of the huge factors which not many discuss is that India is itself a source of cheap and high-quality TMT bars. The steel industry has always one of the successful heavy engineering sectors in India. This meant that India always had a steady supply of TMT bars no matter the situation in the markets.