steel sheets coils for AUTOMOTIVES Cold Rolled Steel

steel sheets & coils for AUTOMOTIVES Cold Rolled Steel Characteristics • High quality products manufactured by the computer integrated system at Asan Bay Works • Uniform thickness, wider width, and hardness and tensile strength • Smooth surface, and uniform flatness • Superior workability

steel sheets & coils for AUTOMOTIVES Cold Rolled Steel Application • Cold rolled steel that Dongbu Steel provides is the optimal product for using in automobile parts as roofs, fenders, hoods, panels, oil fans, etc. Fender Floor Trunk lid Outer Members Fuel Tank

steel sheets & coils for AUTOMOTIVES Cold Rolled Steel Mechanical Properties Dongbu Standard Specification Class T. S (kg/mm 2) EL min. (%) Commercial Quality 28 and over 32∼ 38 and over 28 and over 32∼ 38 50 and under Drawing Quality 28 and over 34∼ 40 and over 28 and over 34 49 and under Deep Drawing Quality 28 and over 36∼ 42 and over 28 and over 36∼ 44 47 and under Non-Aging DDQ 28 and over 36∼ 42 and over 28 and over 43∼ 47 47 and under Hardness T. S EL 2 (Hr. B) (kg/mm ) min. (%) Hardness (Hr. B)

steel sheets & coils for AUTOMOTIVES Cold Rolled Steel Mechanical Properties Standard Specification Class Dongbu T. S (kg/mm 2) EL min. (%) 35 kg/R 35 and over 34 and over 35 34 and over 40 kg/R 40 and over 30 and over 35 kg/E 35 and over 34 and over 40 kg/E 40 and over 30 and over Hardness (Hr. B) T. S (kg/mm 2) EL min. (%) DQ High. Strength DDQ ※ Specifications of high tensile strength steel shall be subject to agreement between manufacturer and purchaser. Hardness (Hr. B)

steel sheets & coils for AUTOMOTIVES Cold Rolled Steel Mechanical Properties • Specification KSD 3512 JIS G 3141 ASTM EN 10130 DIN 1623 SPCC A 366 Fe P 01 - SPCD A 619 Fe P 03 St 12 SPCE A 620 Fe P 04 St 13 SPCEN A 620 Fe P 04 St 14

steel sheets & coils for AUTOMOTIVES Cold Rolled Steel Size Availability (mm) Thickness Width CQ DQ DDQ High-strength 0. 15∼ 3. 2 0. 25∼ 2. 0 0. 6∼ 1. 6 700∼ 1, 600

steel sheets & coils for AUTOMOTIVES Galvanized Products [Galvanized & Galvannealed] Characteristics • Specialty products manufactured by computer integrated system • Excellent flatness achieved by using PLTCM’s base metal • Excellent adhesion of Fe-Zn coating • Induction heating GA furnace - Uniform iron contents on the alloyed surface - Improvement of powdering resistance → Excellent corrosion resistance, weldability, and paintability

steel sheets & coils for AUTOMOTIVES Galvanized Products [Galvanized & Galvannealed] Application Automotive Engine Heat protector

steel sheets & coils for AUTOMOTIVES Galvanized Products [Galvanized & Galvannealed] Mechanical Properties Standard Specification Class T. S Y. P 2 (kg/mm ) (kg/mm 2) EL (%) Dongbu T. S Y. P 2 (kg/mm ) (kg/mm 2) EL (%) Hardness (Hr. B) Commercial Quality - - - 36∼ 42 26∼ 32 34∼ 42 55∼ 65 Drawing Quality min 28 max 22 min 41 28∼ 34 18∼ 22 41∼ 46 40∼ 50 Deep Drawing Quality min 28 max 18 min 43 28∼ 32 15∼ 18 43∼ 48 38∼ 48 Non-Aging DDQ min 28 max 17 min 45 28∼ 32 13∼ 17 45∼ 50 38∼ 48 35 kg/R min 35 min 20 min 36 35∼ 38 20∼ 24 36∼ 42 56∼ 64 40 kg/R min 40 min 23 min 30 40∼ 44 23∼ 27 34∼ 40 60∼ 68 High. Strength ※ Specifications of high tensile strength steel shall be subject to agreement between manufacturer and purchaser.

steel sheets & coils for AUTOMOTIVES Galvanized Products [Galvanized & Galvannealed] Mechanical Properties • Specification KSD 3506 JIS G 3302 ASTM BS 2989 DIN 17162 SGCC A 526 Z 1 St 01 z SGCD 2 A 526 -L Z 3 St 03 z SGCD 3 A 528 Z 4 St 04 z SGCN SGCD 3 N A 653 -97 Z 5 St 05 z

steel sheets & coils for AUTOMOTIVES Galvanized Products [Galvanized & Galvannealed] Size availability DQ / DDQ / EDDQ CQ ※ Please contact our representative for more information on 2. 3 mm thickness of galvanized steel sheets.

steel sheets & coils for AUTOMOTIVES ALCOT [Hot-Dip Aluminium Coated Steel] Characteristics • Excellent heat resistance Surface appearance after heat treatment ALCOT GALVANIZED STEEL ※ Test Condition : At 450℃× 24 Hours In Air COLD ROLLED STEEL

steel sheets & coils for AUTOMOTIVES ALCOT [Hot-Dip Aluminium Coated Steel] Characteristics • Corrosion resistance Corrosion rate with PH changes in solution ※ The corrosion resistance of ALCOT is excellent due to the coating characteristics to form a thin stable aluminum oxide layer.

steel sheets & coils for AUTOMOTIVES ALCOT [Hot-Dip Aluminium Coated Steel] Application Automotive Exhaust system

steel sheets & coils for AUTOMOTIVES ALCOT [Hot-Dip Aluminium Coated Steel] Mechanical Properties Standard Specification Class T. S Y. P min. (kg/mm 2) Commercial Quality Drawing Quality EL min. (%) Dongbu T. S Y. P min. (kg/mm 2) EL min. (%) 28 21 min - DQ 1 28 26 max 34∼ 38 DQ 2 28 24 max 36∼ 40 DQ 3 28 21 max 38∼ 42 EDDQ 26 19 max 40∼ 44 ※ Specifications of high tensile strength steel shall be subject to agreement between manufacturer and purchaser.

steel sheets & coils for AUTOMOTIVES ALCOT [Hot-Dip Aluminium Coated Steel] • Specification KSD 3544 JIS G 3314 ASTM A 463 -96 a EN 10154 SA 1 C CQ CS Type A, B, C DX 51 D, 52 D SA 1 A ADQ - DX 53 D SA 1 D DQ FS, DDS DX 54 D, 55 D SA 1 E DQSK - - • Scope of Manufacturing Field Thickness(mm) Width(mm) Coating Weight(g/m 2) Post-treatment 0. 4∼ 2. 3 600∼ 1, 350 40∼ 160 Chromated, Oiled, No treatment