Mill Upgradation
METRO ISPAT has completed the second phase of Mill upgradtion by introduction of Licenced.
THERMEX COOLING TECHNOLOGY OF Hennigsdorfer Stahi Engineering Gmbh (HSE) through its indian Partner- H&K Rolling Mill Engineer’s Pvt.Ltd. in 2001 (H&K).
METRO ISPAT amongst the first re-rollers to install a modern ‘stop-start’ rotary dividing shear of H&K design-essential when TMT rebars are made.
This upgradation is relevant to India and the Western Region in particular, an earthquake zone.
METRO THERMEX TMT 500 Bars ensure greater safety due to very high elongation values of 16-25%.
The use of high strenght Thermex TMT bars allows a saving of 10 to 15% in steel consumption.
Globalization has now brought awareness about demand for Thermex TMT Bars in the country. In keeping with its tradition, METRO ISPAT Management has taken the lead to produce Thermex TMT Bars of international Standards. In most developed countries, only such rebars with minimum 500N/mm2 yield strength is specified for RCC work. METRO ISPAT chose the German THERMEX COOLING TECHNOLOGY for the production of TMT rebars as it is the globally preffered choice. We now offer steel bars for civil construction as used in advanced countries such as Germany, France and Switzerland etc.
The HSE Thermex System has been successfully employed to produce bars of international Standard German Bst 500 of DIN488, British Gr. 450 of BS 444-1978, Swiss Topar 500S of SIA 162, French Fe E50 of NF A35-016 etc.
Our Collaborators
Hennigsdorfer Stahi Engg. Gmbh, Germany was instrumental in developing the THERMEX Cooling System with the patented proprietory hardware for production of bars with minimum yield strength of 500N/mm2 as demanded by civil engineers. In India, H&K set up THERMEX at the DSP and BSP plants of SAIL who produce Thermex TMT bars in sizes 8 to 36 mm by this process
METRO ISPAT also entrusted the work of modernisation to H&K, the sole Indian licensee of HSE.
Thermex TMT Process
The Thermex Cooling Technology involves subjecting the bar to predetermined quantity of high-pressure water after the last rolling mill stand. This treatment converts the bar surface to a hardened structure. The subsequent phase involves cooling at ambient temp- erature to allow the hot core to temper the surface through thermal exchange. This results in a unique structure of tempered martensite in the peripheral zone and a fine grain ferrite-pearlite at the central zone.
The result is as seen in the photo. Such a structure is the guarantee of a Thermex TMT bar.
It needs to be noted that the bar with a hardened surface needs to be cut with a special dividing shear-similar to that supplied by H&K to DSP METRO ISPAT has obtained such a shear.
The consumer of TMT rebars must ensure that they are using correct TMT rebars. This is essential today as many rolling mills in India are merely spraying water on the bars in an un-scientific way and selling them as "TMT" rebars.
