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  • Automotive products lexicon

 

Advanced High Strength Steels (AHSS)

Multiphase steels with an utimate tensile stress (UTS) between 450 and 800 MPa. AHSS meet all the requirements of automotive customers while taking into account the various interactions between composition, processing parameters and cost. They offer an excellent lightweighting/security/cost compromise.

 

Alusi®

Alusi® is an aluminum-silicon alloy coating. It is resistant to heat, high temperature oxidation and corrosion, and offers a high level of reflectivity, making it suitable for applications in a corrosive atmosphere at high temperatures. With its favorable properties, Alusi® can be widely used, allowing a reduction of overall operating costs when used in place of more expensive materials. Its high level of reflectivity makes it an ideal coating for thermal insulation applications. More information...

 

Bake Hardenable (BH) steels

Specifications designed to increase yield strength after the paint curing process, providing the benefit of both superior formability over traditional high strength steels and high part strength. They acquire their added strength via the amount of strain generated in the part during stamping, and through the time and temperature inherent in the paint curing process. More information...

 

Complex Phase (CP) steels

Complex Phase steels are cold formed to make lightweight structural elements. A number of automotive parts, such as sills and door reinforcements, have simple shapes and the steel is therefore only slightly deformed. For this reason, ArcelorMittal has added the Complex Phase family of steels to its range. These steels offer high as-delivered yield strength and good bendability and stretch flangeability. Given their high energy absorption capacity and fatigue strength, they are particularly well suited for automotive safety components requiring good impact strength and for suspension system components. More information...

 

Deep Drawing Steels (DDS)

A specification of steel with excellent formability characteristics which is recommended for difficult forming applications. DDS steels are also available in standard and extra low carbon forms. It is sometimes produced using ULC (ultra low carbon) or IF steels.

 

Drawing Steels (DS)

DS Steels are readily available specifications which offer good formability. They are Aluminum killed and typically have lower carbon or controlled processing resulting in improved formability.

 

Dual Phase (DP) steels

Dual Phase steels offer an outstanding combination of strength and initial drawability as a result of their microstructure, in which a hard martensitic or bainitic phase is dispersed in a soft ferritic phase. These steels have high strain hardening capacity and as a result finished part mechanical properties, especially yield strength, are superior to those of the initial blank. These steels have excellent fatigue strength and good energy absorption capacity, making them suitable for use in structural parts and reinforcements. More information...

 

Ductibor®

Ductibor® 500P is a steel for hot stamping offered in association with Usibor® 1500P for use in Tailor Welded Blanks (TWBs), where it locally provides softer, more ductile properties than those of Usibor® 1500P. This enables automotive manufacturers to meet new crashworthiness requirements by precisely controlling the crash deformation of specific vehicle parts such as the B-pillar in lateral impact and the longitudinal beams in front and rear impact. More information...

 

Extra Deep Drawing Steels (EDDS)

A highly formable specification of steel ideal for the most difficult forming applications where other steels don’t provide sufficient ductility. This product is produced using IF (Interstitial Free) Steel requiring the use of a degasser in steelmaking as well as close control of alloy additions. More information...

 

Extragal®

Extragal® is a major advance of ArcelorMittal in the monitoring of Hot Dip Galvanizing process for exposed parts. The Extragal® production process, involving a continuous single-step operation after rolling, makes it nearly always the most cost effective pre-coating solution for obtaining the corrosion resistance required in automotive sheet applications. Because of their high corrosion protection capacity and surface quality, Extragal® coated products are recommended for numerous automotive applications, for both visible and non-visible parts. More information...

 

Fortiform®

The family of Fortiform® steels extends ArcelorMittal's range of ultra high strength steels. These steels allow the realization of lightweight structural elements by a cold forming method such as stamping. Thanks to their excellent mechanical properties, Fortiform® grades are particularly suitable for automotive safety parts for crash resistance. More information...

 

Galvannealed

Galvannealed coatings are produced by continuous hot dip galvanizing, in which the steel strip is fed through a bath of molten zinc. The steel substrate can be almost any of our cold-rolled steel products. After leaving the zinc bath, the strip is subjected to heat treatment, which causes iron atoms in the substrate to diffuse into the zinc layer. The Galvannealed coating formed in this way is a zinc/iron alloy containing about 10% iron. More information...

 

High Strength Low Alloy (HSLA) steels

Steels hardened by a combination of precipitation and grain size refining, resulting in high strength with low alloy content. The strength is obtained not only through C and Mn but also through the addition of one or more microalloys (Cb,Ti,V) coupled with controlled processing. This enhances weldability and choice of coatings, since these steels exhibit neither weld zone softening nor grain coarsening. These grades are sold to guaranteed mechanical properties of yield strength, tensile strength, and elongation and are particularly suitable for structural components such as suspension systems and chassis and reinforcement parts. More information...

 

Hot rolled Ferrite-Bainite (FB) steels

This range of hot-rolled, cold-drawn, high strength steels has been developed to meet weight reduction requirements.This family of steels extends the HSLA range of micro-alloyed steels to include products combining high tensile strength (UTS) with excellent formability and hole expansion (stretch flangeability) based on their ferrite-bainite microstructure. The main applications are structural parts (longitudinal beams, cross beams, car-body and ground liason parts), wheels and mechanical parts (ground liason parts, gear boxes...). More information...

 

iCARe®

iCARe® is ArcelorMittal’s range of innovative electrical steels for the automotive market. It helps automakers create environmentally friendly mobility solutions for a greener world. There are three steel types included in the iCARe® offer. Each type is specifically designed for a typical electric automotive application:

  • Save: steels with very low losses
  • Torque: steels with high permeability
  • Speed: steels for high speed rotors

More information...

 

Interstitial Free (IF) steels

Interstitial Free - High Strength – High Strength interstitial free (IF) steels are degassed products with a complete ferritic matrix strengthened by a combination of elements for solid solution, precipitation of carbides and/or nitrides, and grain refinement. These steels were designed to provide an excellent combination of drawability and mechanical strength based on their specific interstitial free (IF) metallurgy. They are particularly suitable for complex parts requiring high mechanical strength, such as wheel arches, toe-boards, reinforcements, etc. More information...

 

Laser Welded Blanks (LWB)

Laser welded blanks (LWB) are widely used in automotive chassis and body-in-white (BIW) components. They are made by welding together flat steel sheets of different thicknesses, grades and coatings. LWB decrease the weight of the vehicle and improve safety by enhancing crash performance. At the same time, they have been shown to reduce the total cost of the vehicle structure. LWB are produced by Tailored Blanks, a business unit of ArcelorMittal with design and production facilities in most parts of the world. More information...

 

Life Cycle Assessment (LCA)

Car makers are facing increasing regulations on vehicle emissions as governments take action to combat climate change. Typically the targets have only focussed on emissions during the use phase of the vehicle’s life – also known as tailpipe emissions. At ArcelorMittal we believe that the entire life cycle of the vehicle should be taken into account when setting emission targets. If tailpipe emissions alone are considered, it is tempting for car makers to substitute steel with lighter materials. While lighter materials might lower emissions during use, they may have a higher carbon footprint during the production and end-of-use phases of their life. Unlike steel which is 100% recyclable at the end of its useful life, many materials cannot be recycled completely. Using a full life-cycle assessment (LCA) approach is the only way automakers can accurately measure, and reduce, the energy consumed by their vehicles over their lifespan. LCA enables them to implement effective global solutions rather than quick fixes. More information...

 

MartINsite®

ArcelorMittal’s MartINsite® ultra high strength steels consist of fully martensitic microstructures offering some of the highest strength levels available in the marketplace. These steels offer much higher strength-to-weight ratios than conventional cold rolled steels. Although limited in formability, alternative available manufacturing technologies such as roll-forming are used to utilize these grades. Typical applications for MartINsite® grades are: bumper reinforcement beams, door intrusion beams, rocker panel inners and reinforcements.

 

Press Hardened Steels (PHS)

PHS are designed to be heat treated and then quenched during the hot stamping process. The mechanical properties of the final part make significant weight savings possible. The very high yield strength of these steels after heat treatment and hot stamping make them suitable for anti-intrusion components (fender beams, door reinforcements, B-pillars, etc.). More information...

 

Rheol®

Rheol® is an internet database portal where our customers can find the properties of products. Main data are useful for the finite element simulation of stamping process or fatigue or crash behaviour.

 

S-in motion®

S-in motion® is a concept for automakers who wish to create lighter, safer and more environmentally friendly vehicles for the 21st Century. The project demonstrates ArcelorMittal’s ongoing commitment to the automotive sector with a catalogue of steel parts and solutions that reduce a vehicle’s weight, while maintaining crash safety, all with no cost increase to customers. More information...

 

Solid solutions steels

Solid solution steels are designed to provide high strength while maintaining good drawability. These steels are hardened by phosphorous in solid solution in the ferrite. Their combination of mechanical strength and drawability makes these grades suitable for numerous applications. They are particularly recommended for structural and reinforcement parts requiring good fatigue and impact strength (longitudinal beams, cross members, B-pillars, etc.). More information...

 

Transformation Induced Plasticity (TRIP) steels

TRIP steels offer an outstanding combination of strength and ductility as a result of their microstructure. They are suitable for structural and reinforcement parts of complex shape. The microstructure of these steels is composed of islands of hard residual autenite and carbide-free bainite dispersed in a soft ferritic matrix. Austenite is transformed into martensite during plastic deformation, making it possible to achieve greater initial elongations. High strain hardening capacity and high mechanical strengths lend these steels excellent energy absorption capacity. TRIP steels also exhibit a strong bake hardening (BH) effect following deformation, which further improves their crash performance. TRIP steels are particularly well suited for automotive structural and safety parts such as cross members, longitudinal beams, B-pillar reinforcements, sills and bumper reinforcements. More information...

 

Ultra High Strength Steels (UHSS)

Multiphase steels with an utimate tensile stress (UTS) beyond 980 MPa. UHSS meet all the requirements of automotive customers while taking into account the various interactions between composition, processing parameters and cost. They offer an excellent lightweighting/security/cost compromise.

 

Ultragal®

Ultragal® is a coating specifically recommended for visible part applications in the automotive sector. With this production process, waviness in steel products can be controlled both before and after forming. In an optimized painting process configuration, Ultragal® lends the painted part very high-quality paint appearance (even better than a standard galvanized substrate). With waviness reduced to a very low value, Ultragal® also contributes to enhanced reproducibility of paint appearance quality. More information...

 

Usibor®

Usibor® 1500 is a pre-coated (aluminised coating) steel grade for hot forming process. The aluminum –silicon pre-coating was developed to protect the metal from oxidation (scale) and decarburization during the hot stamping process. The coating offers excellent resistance to oxidation resulting from the hot stamping heat treatment process; final parts using this forming technology have improved corrosion resistance after painting. Usibor® 1500 possesses a very high mechanical strength after hot stamping and is in the range of products developed to meet vehicle weight reduction requirements. Usibor® 1500 is intended for use in automobile structural and safety components. More information...

 

Zagnelis®

Zagnelis® coating has been specially designed to improve corrosion protection of vehicles, while satisfying OEMs' specifications regarding manufacturability: stamping, welding, adhesive bonding, painting process... More specifically, it offers a corrosion resistance much superior to the one of traditional zinc-based coatings. Presence of Magnesium in the coating leads to the formation of compact and very stable corrosion products during the early stages of corrosion and thus decreases coating consumption kinetics and reinforces cut edges protection. Furthermore, Zagnelis® coating presents an excellent stamping ability due to outstanding tribological properties for a zinc-based coating. More information...