Steel for Life: ArcelorMittal

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Steel for Life: Headline Sponsor Innovation key to progress ArcelorMittal has been at the forefront of steel manufacturing technology developments since 1911 when Arbed, one of its constituents, rolled the world’s first one metre deep universal beam. 10 NSC June 17 The ambition to stay at the forefront of developments in steel manufacturing has been maintained through the years since 1902 when ArcelorMittal rolled its first universal beam, developing into today’s multinational steel manufacturing force, standing just outside the top 100 of the world’s biggest companies as ranked in the Fortune Global 500. Recent developments include the launch of its Orange Book design tool, and the company is also promoting high grade S460 steel and its innovative HISTAR® range in the UK market. The company says being able to manufacture larger and heavier sections enables engineers to cater for the changing and demanding requirements of their clients. “Innovation and research and development remain a fundamental part of ArcelorMittal’s DNA,” says the company’s Neil Tilley. “Recently we have promoted the benefits of high grade steels that we have developed and made available to the UK market, where engineers are increasingly taking advantage of the benefits. Using high grade steels designers are able to reduce the weight of steel used in a structure or reduce column sizes in buildings to produce more usable space.” Super Jumbo Sections are now used extensively in the UK market with column sizes up to 356 × 406 × 1299 and beams up to 1138 mm depth. The combination of strength and size offer gives designers more choice, whether designing tall slender skyscrapers or long-span roofs and bridges. Another benefit is the low carbon equivalent value (CEV) of HISTAR® steels, exhibiting toughness at low temperatures and increased weldability, allowing easier processing through fabrication workshops. Mr Tilley said: “Designing in high strength steel chimes with today’s sustainability imperatives to do more with less weight. Cost savings of as much as 20% are being achieved by using high strength steels.” ArcelorMittal’s HISTAR® range allows designers to utilise the full yield throughout the thickness range for HISTAR®355 and for HISTAR®460, dropping marginally to 450N/mm2 only at thicknesses over 100mm. Cost-effective production of HISTAR® is made possible by the innovative“in line” Quenching and Self-Tempering (QST) process, developed by ArcelorMittal Europe - Long Products in cooperation with the Centre de Recherches Métallurgiques in Liège. HISTAR® steels are delivered in accordance with the European Technical Approval ETA-10/156. Figure 1 (above) shows a comparison, based on yield strength, between HISTAR® and other standard structural steel grades. HISTAR® grades are compatible with the requirements of the Eurocodes for the design of steel structures and composite steelconcrete structures. Weathering Steel Rolled Sections ArcelorMittal also reports growing interest in weathering steel for exposed steel structures and bridges, where safety considerations for access and maintenance of protective systems is a consideration. The company produces rolled sections in its Arcorox® weathering steel grade to EN 10025-5 in grades S355 J0W, J2W and K2W. Initial oxidation of Arcorox® forms a natural, tightly adherent, protective oxide layer (patina) which greatly reduces further oxidation and negates the need for a further protective system. AngelinaTM Beams ArcelorMittal lays claim to an innovative and novel approach to service integration and long span composite beams that has resulted in the development of the AngelinaTM beam. Based on a sinusoidal web cut, AngelinaTM beams produce no waste from the cell formation and can accommodate single web openings for both circular and rectangular services. By varying the input to the sinusoidal equation, cells can be sized and positioned for greatest economy and efficiency, see Figure 2 below. Pre-design software for AngelinaTM beams can be downloaded from http://sections. arcelormittal.com/download-center/designsoftware/ castellated-beam-solutions.html Figure 2. Geometric limits of the AngelinaTM beam openings. Neil Tilley concludes: “The advantages of our wide range of sections and high grade steels are becoming more popular with engineers. Recent work and collaboration with the Steel Construction Institute (SCI) AngelinaTM beams in use for construction Figure 1: Comparison of yield strength between HISTAR and other structural steel grades ArcelorMittal supports designers with an extensive range of free pre-design software and design guidance, all available from http://sections.arcelormittal. com.


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