Shivam Iron offers its TMT bars under the brand name SISCON. TMT bars are produced through “Thermax Process”, . We manufacture ISI Brand Tmt Bars from Size 8mm To 36mm in Grades Fe-415, Fe-500 And Fe-550. SISCON TMT bars have high strength and good ductility, which make them especially suitable for high rise buildings, even in earthquake zones 4 -