AMONG THE SPECIAL FEATURES OF PRODUCTS ARE HIGH DEGREE OF STRENGTH, EXTRAORDINARY DUCTILITY AND RELATIVE INCREASE IN LENGTH IN SOME TESTS OF RIBBED BARS 520 AND 340.THIS MEANS THAT THESE PRODUCTS HAVE A HIGH WELD ABILITY AND A HIGH RESISTANCE AGAINST FATIGUE AND CYCLIC, DYNAMIC AND IMPACT LOADS IN ADDITION TO A HIGH STRENGTH
Ductility & Weld ability
As the elements more destructive than such phenomena as fatigue and cyclic load, they may result in steel failure below strength limit and tensile stress because of a cycle of alternating stresses specially in bridges. All the elements stated above may give rise to a hysteresis loop. Ductility takes ever greater importance in the buildings and installations which are subject to impact, dynamic and seismic stresses. This is because steel may fail before reaching tensile strength and finally bring the structure down
Features and Specifications
• Taking use of most advanced equipment, the experiences of local and foreign experts and improvement of laboratory and research facilities, this complex has continuously improved mechanical properties of its products, ductility of ribbed bars and strength of all products.
This is especially important in respect of big size ribbed bars.
• Major equipment of rolling line has an important role in manufacture of a product with standardized tolerance, dimensions, mechanical properties and proper microscopic structure.
• To have a continuous control over the product and to bring a progressive improvement, we have established a full advanced set of laboratory and research equipment and facilities in the way every mechanical test and metallography is carried out in our own premises. Precision and sensitivity of our equipment have made our laboratory the reference laboratory of the region.
• All the reinforcement bars manufactured in this complex are ribbed bars 420 with minimum tensile strength of MPA 420 and Ribbed Bars 520 having minimum tensile strength of MPA 520 in accordance with the last version of national Iranian standard.
• Along with the advancements in rolling technology , the proved automation system used in monitoring and controlling the temperature and cooling speed and the availability of thermex system it has been possible nowadays to produce ribbed bars No.320 and higher classes with desirable weld ability, mechanical specifications and ductility fortunately, national standard organization of Iran also approved ribbed Bars 500 and 520 in an accordance with reputable global standards. Upon approval of the new standard, Our Complex has commenced mass production of Ribbed Bars 520
Tests and studies recently carried out indicated that lengthwise and transverse ribs intersection may bring a concentration of stress and fatigue. Therefore, our Company took an essential measure in this regard and by using the most modern European systems chose to create fusiform ribs in the way that lengthwise and transverse ribs would be apart and away from each other and the standardized spacing would be observed