Thermo mechanically treated steel known as TMT steel can be described as a new-generation-high-strength steel having superior properties such as weldability, strength, ductility and bendability meeting highest quality standards at international level. Under thermo mechanical treatment of bars, the steel bars are made to pass through a specially designed water cooling system where these are kept for such a period that outer surface of bars becomes colder while the core remains hot. This creates a temperature gradient in the bars. When the bars are taken out of the cooling system, the heat flows from the core to the outer surface causing further tempering of steel bars thereby helping them in attaining higher yield strength of steel.
To decide the percentage of carbon content in steel has been a major challenge for the engineers. While certain minimum carbon content in steel is essential to achieve the required strength, an excess of carbon content threatens its property of weldability. In TMT bars, this problem has been eliminated. In these bars, the carbon content can be restricted to 0.2% to attain weldability and at the same time no strength is lost on this account. The joints can be welded by ordinary electrodes and no extra precautions are required.
Another advantage of TMT bars is their tough surface providing high yield strength and a soft core providing excellent ductility. Strength, weldability and ductility are such properties which declare TMT steel highly economical and safe for use. An additional advantage of TMT steel is that a twisting operation is included in Tor steel, which subjects the bars to torsional stresses making them less corrosion resistant while TMT bars are free of such stresses thus having superior corrosion resistance.
Panchakanya Steel (P) Ltd
Commitment of the top level management at panchakanya towards quality production was fulfilled with recognition as the "First steel industry to be bestowed the NS mark and NS quality award 1999 certified by Nepal Bureau of Standard. Besides it also became first industry in Nepal to be certified ISO: 9001 by Lloyds' Quality Assurance Register.
Panchakanya TMT Steel bar, new generation high strength ribbed reinforcement bar, with Thermo Cooling Technology, licensed under Hennigsdorier Stethi Engg. GmbH (HSE), Germany was manufactured for the first time in the year 2002 and was introduced in the market. The Group has been marching with the slogan "Always First, Always Ahead".