Extragal® and Galvannealed
Extragal® (GI) – this type of coating is obtained through the hot-dip galvanizing process (where the steel is bathed in melted zinc); this coating produces high surface quality, corrosion resistant and malleable steel. The result is a strip that is proper for the manufacturing of both exposed and non-exposed parts for a variety of applications. The single operation production process makes Extragal® an economic solution for parts which need to be corrosion protected.
Galvannealed/Zinc-Iron alloy (GA) – this type of coating is the result of bathing the strip in molten zinc followed by a thermal treatment that makes the diffusion of the iron from the strip with the zinc from the coating, thus creating a coating formed by a zinc-iron alloy with 10% iron, which makes this product specifically good for spot welding.
The excellent corrosion resistant quality and the high surface quality make Galvannealed products recommended for several applications especially in the automotive industry for exposed and non-exposed parts. Because of its iron content it is less malleable when compared to the Extragal® coating. Under industrial conditions, its high quality surface allows an ideal painting appearance for exposed parts.
The types of coating supplied for this product are:
Did you know?
Comfort in the car seat
Under the cushion of a comfortable car seat there is a complex steel structure and a good chance it has been produced by ArcelorMittal.
Our steel is also used in the structure that adjusts the seat, the lock that prevents it from sliding and the rails where the seat is mounted.
Lighter and higher strength
In order to beat the challenge of manufacturing safer and more economical cars, the world automotive industry counts on the supply of lighter and higher strength steel. This way, the new cars spend less fuel because they are lighter, but have safer structures to protect the people.
ArcelorMittal Tubarão, together with Vega, has become one of the main suppliers of the Brazilian automotive industry by offering steel with these characteristics.
Outstanding for quality and longevity
ArcelorMittal Tubarão Blast Furnace 1 is considered a steel industry landmark for its longevity and quality. Started-up in 1983 with a revamping forecast for 1991, the equipment had its lifespan stretched to 2012 beating all world records. In 2013, after its first revamping, it returned to operation at its regular levels of quality and productivity.
The creation of the Ocean Barge Terminal made it possible for ArcelorMittal Tubarão to use cabotage as a means to transport coils to the São Francisco do Sul port where ArcelorMittal Vega is located.
The capacity of each barge is approximately 5 thousand tons of steel. Besides gains in efficiency the barges make it possible to avoid road transportations reducing CO2 emissions.
Started-up in 2002 as one of the most modern plants of the world steel industry, the Hot Strip Mill (HSM) in Tubarão has never stopped to evolve. Continuous investments in improvements and the implementation of the second reheating oven the HSM has more than doubled its production capacity going over the original forecast of 1.8 million tons to produce more than 4 million tons in 2013.
Technology for construction
One of the segments which have largely increased the use of steel is construction. New technologies make it possible to make better use of characteristics such as durability and resistance to build houses and buildings faster and with more quality.
ArcelorMittal Tubarão has contributed to steel use development in construction by supplying customized products and services to the sector.