Structural steel grades
Sections and merchant bars
Steel grade range
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Technical information
Non-alloy structural steels according to European standards:
- S235JR, S235J0, S235J2*
- S275JR, S275J0, S275J2*
- S355JR, S355J0, S355J2, S355K2
- S450J0
Weldable fine grain structural steels according to European standards:
- S275M*
- S355M, S355ML
- S420M, S420ML
- S460M, S460ML
Steel grades according to American standards:
- A36-14 Grade 36*
- A572-15 Grade 42*, 50, 55*, 60*, 65*
- A588-15 Grade B*
- A709-13 Grade 36*, Grade 50, Grade 50S
- A913-15 Grade 50, 65, 70, A992-11(15) Grade 50
Steel grades according to Russian standards:
- GOST 535-2005 St3ps* cat 5
- GOST 19281-2014 09G2S*
Steel grades according to Japanese standards:
- JIS G 3106-2015 SM 400 A*, SM 400 B*, SM 400 C*; SM 490 YA* SM 490 YB*
- JIS G 3101-2015 SS 400*, S 490*
*available upon agreement
Other grades are available upon request.
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PerformanceRelated news & technical articles
The ATRIO Towers in Bogota: The first high-rise venture for ArcelorMittal in South America
18 March 2021ATRIO is an impressive mixed-use project located in the centre of Bogota, Colombia. Composed of two towers, North and South, it will offer 250 000 m² of office space and 10 000 m² of public space at ground level. It is the first high-rise project for ArcelorMittal in South America. 90% of the steel sections for the construction of the North tower were provided by ArcelorMittal.
Project NewsOur steel found in mint condition in 1904 house
9 February 2021In the city of Bonn in Germany, steel beams produced by ArcelorMittal's Differdange mill were recently discovered in perfect condition in a centenary house during a remodelling project.
Product NewsInnovative solutions for steel lattice towers + webinar video
29 January 2021The increase in renewable energies and the progress in telecommunication technologies (e.g. G5) require the construction of new and/or the reinforcement of existing transmission lines and telecommunication towers.The European Network of Transmission System Operators for Electricity (ENTSO-E) expect 18 000 kilometres of new transmission lines to be constructed in Europe by 2035 to cover the demand of renewable energies.
Industry News
The ATRIO Towers in Bogota: The first high-rise venture for ArcelorMittal in South America
ATRIO is an impressive mixed-use project located in the centre of Bogota, Colombia. Composed of two towers, North and South, it will offer 250 000 m² of office space and 10 000 m² of public space at ground level. It is the first high-rise project for ArcelorMittal in South America. 90% of the steel sections for the construction of the North tower were provided by ArcelorMittal.
3900 tonnes of sections from ArcelorMittal plants in Luxembourg and Spain
Constructing a high-rise building in a seismic zone and in a country where most constructions are made of concrete was a sizable challenge taken up by the teams involved in this project.
Designed by the architecture firms Rogers Stirk Harbour + Partners and El Equipo Mazzanti, the ATRIO Towers feature impressive column elements and facade trusses built to resist seismic activity and to improve the torsional behaviour of the structure - a breakthrough for local architecture and structural design.
To comply with the design and its technical requirements, ArcelorMittal International provided 3900 tonnes of steel sections, including 400 tonnes in HISTAR® grade (ASTM A913), produced by ArcelorMittal Europe – Long Products in Differdange.
Customers 100% convinced by the steel solution
ArcelorMittal Europe – Long Products’ association with the project (through our technical assistance department) began in 2013 with AECOM consultants and subsequently with ARUP engineering.
A number of reasons were behind the choice to work with ArcelorMittal:
• HISTAR® steel offers the exact weldability properties that the client needed and does not require preheating.
• We offer the widest range of sizes among steel producers.
• We can provide long-length sections as well as cut-to-length sections.
• The project required steel made with at least 50% recycled material and our sections are 100% scrap-based.
Apart from its mechanical properties, the use of steel helped to improve the design of the tower. Thanks to the jumbo steel sections embedded in concrete, column size was reduced resulting in elegant slender composite columns with sophisticated diagonal lines in the facade.
Breathing new life into the city centre
This development provides a boost to the Centro Internacional area, the city’s former business district, by bringing new business, tourism, public transportation, and culture to the area. The construction of the North Tower, measuring 200 metres (44 floors), is the first phase of the project. 50 000 m² of office space, 4 600 m² of public services, and 1800 m² of retail space are available.
The high quality of our products, the service provided, and the efficient cooperation between the teams at ArcelorMittal International and ArcelorMittal Europe – Long Products were important factors in our successful participation in this project.
The construction of the ATRIO North Tower started in 2015 and is now complete. It is one of the first major steel high-rise buildings in South America, and it certainly won’t be the last.
An award-winning tower
ATRIO North Tower attained LEED GOLD certification and has won several awards, including:
• Council on Tall Buildings and Urban Habitat (CTBUH) 2021 Awards in the following categories: Best Tall Building 200-299 Metres 2021 Award of Excellence, Best Tall Office Building 2021 Award of Excellence, and Structural Engineering 2021 Award of Excellence.
• ICCA ACESCO 2019 Prize in the Building category.
An international team
Architects
- Rogers Stirk Harbour + Partners (British)
- El equipo Mazzanti (Colombian)
Engineering
- ARUP (British)
- P&D (Colombian)
Steel Fabricators
HST Estructuras consortium composed of:
- TECMO S.A. (Colombian)
- HB Estructuras (Colombian)
- SUPERMETAL (Canadian)
Construction
ARPRO-EllisDon consortium
Consultants
AECOM
Management
QBO Constructores
Text:
ArcelorMittal Europe Communications
Constructalia
Images:
ArcelorMittal International
Related link(s)
Our steel found in mint condition in 1904 house
In the city of Bonn in Germany, steel beams produced by ArcelorMittal's Differdange mill were recently discovered in perfect condition in a centenary house during a remodelling project.
First-class quality after almost 120 years
Blending in with the white interior design of the house, the beams could almost go unnoticed. This was exactly the case until the owner, Paul Udo Hanus, decided to renovate. He was astonished by his discovery: 'DIFFERDINGEN NP 12' stood out on the massive steel beams that were "in perfect condition".
Wondering where the beams could have been manufactured, Paul’s internet search led him to ArcelorMittal. He thought it would be a nice idea to contact the company. In an email, he highlights the perfect condition of the steel beams and pays compliment to the colleagues and employees of 1904 and to ArcelorMittal for the first-class quality that is still maintained today. Steel beams were manufactured under difficult, industrial conditions at that time, which is why the long durability is even more gratifying.
Our Differdange mill today
Today, ArcelorMittal Europe – Long Products’ Differdange mill still produces similar beams. Thanks to several modernisation programmes over the years, today the mill can produce the heaviest beam blanks and the longest and heaviest beams in the world.
Moreover, the QST (Quenching and Self-Tempering) process is being used to produce a new generation of HISTAR® beams of exceptionally high quality.
Thanks to their high yield strength, outstanding robustness, and very good welding properties, they have made Differdange famous worldwide. They are used in the construction of high-rise buildings all over the world and will probably last at least 120 years - just like their ‘great-grandfathers’ in Bonn.
Text:
ArcelorMittal Europe Communications
Constructalia
Images:
ArcelorMittal
Innovative solutions for steel lattice towers + webinar video
Meeting the new standards
The increase in renewable energies and the progress in telecommunication technologies (e.g. G5) require the construction of new and/or the reinforcement of existing transmission lines and telecommunication towers.
The European Network of Transmission System Operators for Electricity (ENTSO-E) expect 18 000 kilometres of new transmission lines to be constructed in Europe by 2035 to cover the demand of renewable energies.
Weight reduction using S460
Steel lattice towers made of fully recyclable hot rolled angle profiles are a typical solution for transmission and telecommunication towers.
The use of high strength steel (e.g. S460) in steel lattice towers reduces the weight of standardised towers up to 20% compared to normal steel grades (e.g. S355), leading to lighter structures which are easier and faster to erect.
Innovative solutions
The reinforcement of existing steel lattice towers with carbon fibre reinforced polymer (CFRP) strips increases the resistance of the main bearing elements by 50% and allows a quick and easy upgrade of the towers to higher voltage and bigger G5-antennas.
Text:
ArcelorMittal Commercial Sections
Constructalia
Images:
ArcelorMittal
Angelhy
Video:
Steligence
Related link(s)
Useful information
MoreA wide range of the highest quality
The mechanical characteristics of ArcelorMittal's sections are improved by precise control of the temperature during the rolling process.
Steels, produced using thermomechanical rolling (delivery condition M), feature improved toughness values thanks to a lower carbon equivalent and a fine microstructure when compared with normalised steels. With regard to their technological properties, the thermomechanically rolled steels have good cold forming properties. Similar to conventional structural steels, they can be flame straightened provided specific maximum temperatures are not exceeded.
In case stress relieving is considered for reducing residual stresses, the usual parameters concerning temperature range and heating time according to the rules of practice must be applied. Hot forming, which is uncommon for the fabrication of sections, must not be performed in accordance with EN 10025:2004.
The steels are typically delivered with an Si content ranging between 0.14% and 0.25% and are as such capable of forming a zinc layer during hot-dip galvanisation.
As the phosphorus content of these steels is usually lower than 0.035%, this does not have any influence on the final thickness of the coating in the considered Si range.