steel sheets & coils for AUTOMOTIVES 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 Cold Rolled Steel

steel sheets & coils for AUTOMOTIVES Application Cold Rolled Steel Cold rolled steel that Dongbu Steel provides is the optimal product for using in automobile parts as roofs, fenders, hoods, panels, oil fans, etc. FenderTrunk lid Outer FloorFuel TankMembers

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

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

steel sheets & coils for AUTOMOTIVES Mechanical Properties Cold Rolled Steel Specification KSD 3512JIS G3141ASTMEN 10130DIN 1623 SPCC A 366Fe P01- SPCD A 619Fe P03St 12 SPCE A 620Fe P04St 13 SPCEN A 620Fe P04St 14

steel sheets & coils for AUTOMOTIVES Size Availability Cold Rolled Steel Thickness Width CQDQDDQHigh-strength 0.15 ∼ ∼ ∼ ∼ ∼ 1,600 (mm)

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

steel sheets & coils for AUTOMOTIVES Mechanical Properties Galvanized Products [Galvanized & Galvannealed] 60 ∼ ∼ ∼ ∼ ∼ 65 Hardness (HrB) 43 ∼ 4815 ∼ 1828 ∼ 32 min 43max 18min 28 Deep Drawing Quality 36 ∼ 4220 ∼ 2435 ∼ 38 min 36min 20min 3535kg/R High- Strength EL (%) Y.P (kg/mm 2 ) T.S (kg/mm 2 ) EL (%) Y.P (kg/mm 2 ) T.S (kg/mm 2 ) 41 ∼ 4618 ∼ 2228 ∼ 34 min 41max 22min 28Drawing Quality 34 ∼ ∼ ∼ ∼ ∼ ∼ 42 Dongbu min 23 max kg/R Non-Aging DDQ Commercial Quality Class 23 ∼ 27 min 30min ∼ 17 min 45min ∼ Standard Specification ※ Specifications of high tensile strength steel shall be subject to agreement between manufacturer and purchaser.

steel sheets & coils for AUTOMOTIVES Mechanical Properties Specification KSD 3506JIS G3302ASTMBS 2989DIN SGCC A 526Z1St 01z SGCD 2 A 526-LZ3St 03z SGCD 3 A 528Z4St 04z SGCNSGCD3NA Z5St 05z Galvanized Products [Galvanized & Galvannealed]

steel sheets & coils for AUTOMOTIVES Size availability CQ DQ / DDQ / EDDQ ※ Please contact our representative for more information on 2.3mm thickness of galvanized steel sheets. Galvanized Products [Galvanized & Galvannealed]

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

steel sheets & coils for AUTOMOTIVES 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. ALCOT [Hot-Dip Aluminium Coated Steel]

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

steel sheets & coils for AUTOMOTIVES Mechanical Properties ※ Specifications of high tensile strength steel shall be subject to agreement between manufacturer and purchaser. DQ2 DQ1 34 ∼ max28 34 ∼ max28 38 ∼ max28 38 ∼ max28DQ3 Drawing Quality EL min. (%) Y.P (kg/mm 2 ) T.S min. (kg/mm 2 ) EL min. (%) Y.P (kg/mm 2 ) T.S min. (kg/mm 2 ) 40 ∼ ∼ Dongbu 19 max 24 max 21 min EDDQ Commercial Quality Class 19 max 40 ∼ max 36 ∼ min-28 Standard Specification ALCOT [Hot-Dip Aluminium Coated Steel]

steel sheets & coils for AUTOMOTIVES Specification KSD 3544JIS G3314ASTM A 463ASTM A aEN SA1C CQCS Type A,B,CDX 51D,52D SA1A ADQ-DX53D SA1D DQFS, DDSDX54D,55D SA1E DQSK-- Scope of Manufacturing Field Thickness(mm)Width(mm)Coating Weight(g/m 2 )Post-treatment 0.4 ∼ ∼ 1,35040 ∼ 160 Chromated, Oiled, No treatment ALCOT [Hot-Dip Aluminium Coated Steel]