April 2014 Laser grades April 2014

1 Market needs vs technical requirements High cutting speedExcellent flatness and surface quality Your needs A global economical solution ArcelorMittal answer Cutting accuracySpecific chemistry, good cleanliness Consistent formability and process abilityTight mechanical properties range Fast & accurate weldabilityWeldable and cuttable chemistry Minimal requirement for reworkControl of residual stresses Ease of painting or galvanisingExcellent surface quality

Specific chemistry and a good cleanliness to improve laser cutting, welding or galvanising Lower silicon content Lower carbon content High Carbon promotes CO 2 formation, limiting O 2 diffusion. Resulting in lower speed. Over-combustions or disturbances on banded structures which presents local concentrations rich in carbon. Lower sulphur and phosphorous Internal cleanliness to improve cut edge quality 2 12-mm plate containing bad qualitygood quality 0.03% Si 0.3% Si

Specific process to improve flatness before, during and after laser cutting Coils The diagram of controlled rolling and cooling allows to obtain a great regularity of the mechanical characteristics to limit the internal stresses and to improve the flatness of the sheet. The reduction of the thickness tolerances makes it possible to decrease the average weight of the cut out parts and contributes to the regularity of the springback when folding. Sheets A specific levelling process makes it possible to reduce the effects of the internal stresses and to control their effect on flatness. 3

Standard Products ArcelorMittal offer Principles 4 cutting machine sensitive robust simple complex standard tight Flatness severity on sheet Severity on internal tensions S---Laser Classic S---Laser Premium cut part Complexity Dimensional tolerances Special Flatness Normal Flatness

ArcelorMittal offer Guarantees 5 S---Laser PremiumS---Laser ClassicS---Laser

Dimensional range* Dry offerPickled offer Thickness range (mm) Width range (mm) Thickness range (mm) Width range (mm) Coils: Laser2.00 ≤ th < ≤ th < Sheets: Laser Classic 2.50 ≤ th < ≤ th < Sheets: Laser Premium 2.50 ≤ th < ≤ th < ArcelorMittal offer Range 6 * Dimensional range is indicative. For detailed feasibility for each size and grade, please refer to our product catalogue on industry.acelormittal.comindustry.acelormittal.com Structural steels S200 Laser AM FCE S240 Laser AM FCE S275 Laser AM FCE S355 Laser AM FCE Structural steels S200 Laser AM FCE S240 Laser AM FCE S275 Laser AM FCE S355 Laser AM FCE High Strength Low Alloy (HSLA) steels S320MC Laser AM FCE S360MC Laser AM FCE S420MC Laser AM FCE High Strength Low Alloy (HSLA) steels S320MC Laser AM FCE S360MC Laser AM FCE S420MC Laser AM FCE

ArcelorMittal offer Grades and chemical composition 7 Mechanical properties, see details on our website: Chemical properties

8 Laser qualities may be delivered as Mill finish Pickled and oiled Pickled with dry coating Easyfilm ® ArcelorMittal offer Surface functionalisation

9 Conclusion Laser grades are the perfect materials that will help you to take full advantage of your piece of equipment: Higher productivity Excellent quality of cut edges No distortions after cutting Excellent processability ArcelorMittal supports you by developing Specific qualities Services

10 For further product information please contact your Client Technical Support Managers. Thanks for your attention... Photo credits: TRUMPF Gruppe, Jacques Van den Berghe, Philippe Vandenameele