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UNION STEEL MFG.CO., LTD. www.unionsteel.co.

1 UNION STEEL MFG.CO., LTD. Desigbed by Hyuncom

2 & COLORLUME Idealism Naturalism COLORLUME

technologies and to protect environment.

3 & COLORLUME C o n t e n t s New Leader Union Steel, a leader in Korean steel industry, is 21st century-oriented steelmaker, which has been striving hard to develop new products and new technologies and to protect environment. Introduction to Unilume Unilume Usage Unilume Characteristics Introduction to Colorlume Colorlume Usage UnilumeColorlume Manufacturing Process UNION STEEL MFG.CO., LTD. / 5

4 ALUMINUM-ZINC ALLOY COATED STEEL ALUMINUM-ZINC ALLOY COATED STEEL Unilume ideally combines characteristics of aluminum coated steel and galvanized steel. UNION STEEL MFG.CO., LTD. 6 / 7

ALUMINUM-ZINC ALLOY COATED STEEL ALUMINUM-ZINC ALLOY COATED STEEL What is

manufactured at an optimum ratio of alloy, enriches our living environment

Unilume steel is the result of an ideal alloy of aluminum and zinc.

ratio), zinc(3.% in weight), and silicone (1.

5 ALUMINUM-ZINC ALLOY COATED STEEL ALUMINUM-ZINC ALLOY COATED STEEL What is Unilume 55% ALUMINUM-ZINC ALLOY COATED STEEL Naturalism Unilume, which is manufactured at an optimum ratio of alloy, enriches our living environment by preserving the blessings of nature. Unilume steel is the result of an ideal alloy of aluminum and zinc. It consists of aluminum (55% in weight ratio but 8% in surface volume ratio), zinc(3.% in weight), and silicone (1.6% in weight ratio) so it has both aluminum-unique corrosion-resistance and heat resistance and zinc-unique "galvanic behavior". UNION STEEL MFG.CO., LTD. 8 / 9

6 Usage Unilume Usage Unilume, Unon Steel's new concept steel, which is produced by Union Steel's advanced technology, is widely used in various kinds of industry such as building interiors or exteriors, electricity, electronic appliances, automobile parts, and drain pipe, due to its high quality and economical efficiency. UNION STEEL MFG.CO., LTD. 1 / 11

Thickness Unilume Both Galvanized Both Result No red oxidation rust after 35,3 Hr run Red

Periodic water-vapor test 22 Cycle 75 Cycle 116 Cycle Red rust External appearance Red rust

Al-coated Unilume Traces of red rust at cut section Bright surface 1 Red rust at cut section

environment, 2 Hr-dry after exposing of 22 hours (1 Cycle) Production Availability Thickness( ).

5 Width ( ) 6 ~ 1,6 Sheet Length ( ) 6 ~ 5, Coil Weight (Max) 35M/T Coil Inner Diameter ( )

2g/ 52 Suface Treatment Chromated Anti Finger Printed Oiled Cleanlume Lubricant Unilume Cr-Free

7 CHARACTERISTICS PRODUCTION AVAILABILITY Humidity Test Cleveland condensing cabinet test Specimen Coating wt Thickness Unilume Both Galvanized Both Result No red oxidation rust after 35,3 Hr run Red oxidation rust before 6, Hr run Condition : Exposed surface change under relative humidity 1%6 Periodic water-vapor test 22 Cycle 75 Cycle 116 Cycle Red rust External appearance Red rust External appearance Red rust External appearance Gavanized 1 Red rust at cut section 1 1 Al-coated Unilume Traces of red rust at cut section Bright surface 1 Red rust at cut section Dark surface 2 Rust at cut section & Bends Red rust at cut section Condition : Water-vapor bo 55 environment, 2 Hr-dry after exposing of 22 hours (1 Cycle) Production Availability Thickness( ).3 ~ 2.5 Width ( ) 6 ~ 1,6 Sheet Length ( ) 6 ~ 5, Coil Weight (Max) 35M/T Coil Inner Diameter ( ) 58/61 Coating Weight AlZn alloy Coating Thickness Coating Weight () 9g/ 2 1g/ 26 12g/ 32 15g/ 2g/ 52 Suface Treatment Chromated Anti Finger Printed Oiled Cleanlume Lubricant Unilume Cr-Free Salt Spray Test SST(Salt Spray Test):G/L SST(Salt Spray Test):STS 9L Salt Spray Test Condition : Conforming to ASTM B Unilume Coating wt Both Number of hours before visible red rust Galvanized Both Unilume Galvanized Al-coated Al-coated UNION STEEL MFG.CO., LTD. 12 / 13

SPECIFICATION JIS G 3321 Outdoors Exposure Test (For 13 Years)

and almost equal to characteristics of Al-coated steel.

Discoloration at 25 Unilume : No discoloration even for durable

resistance at high Unilume Al-coated Increase in weight, mg Hours

with G/L roof and GI roof vent 1 years at 25m beach Galvanized %

59 ~ 65 Unilume Al-coated Temperature range 7 & Over Unilume

8 CHARACTERISTICS KS SPECIFICATION KS D 377 ASTM SPECIFICATION ASTM A 792 JIS SPECIFICATION JIS G 3321 Outdoors Exposure Test (For 13 Years) Heat-resistance of Unilume is far superior to that of galvanized, and almost equal to characteristics of Al-coated steel. Galvanized : Recommendable temperature ; 23 & under, Discoloration at 25 Unilume : No discoloration even for durable use at 315 Increase in weight, mg Comparison of corrosion resistance at high Unilume Al-coated Increase in weight, mg Hours Hours G/L roof 2 years at light industrial area 25 years compare with G/L roof and GI roof vent 1 years at 25m beach Galvanized % AI-Zn Temperature range 8 ~ 5 Unilume Al-coated Temperature range 59 ~ 65 Unilume Al-coated Temperature range 7 & Over Unilume Al-coated 7% AI-Zn 55% AI-Zn Galvanized Unilume Al-coated 1 Al-coated 2 Edge Condition-17 years industrial area UNION STEEL MFG.CO., LTD. 1 / 15

9 CHARACTERISTICS KS SPECIFICATION KS D 377 ASTM SPECIFICATION ASTM A 792 JIS SPECIFICATION JIS G Spot Welding condition Unilume's heat reflexibility almost doubles that of galvanized steel so it has an energy saving effect if it is used in roofing and panelling without painting Material Al-coated : 3g/ Unilume : 15g/ Galvanized : 275g/ Asbestos cement Heat-transmission : h/watt/ Seam Welding condition.9.9 Nov 12-18, R 12.7R 6.35R 6.35R ,5 16, 21,5 22, ,5 1,5 1,5 1, EPA Min..65 CT 55% Al-Zn.78 AC 55% Al-Zn.75 EPA Min..5 CT 55% Al-Zn.56 AC 55% Al-Zn A B C D E Unilume has the same characteristics with galvanized steel sheet in workability & formability, and especially, micro crack at forming section is much less than galvanized steel sheet. Therefore, Unilume has excellent durability at forming section. Unilume can be painted without pre-treatment or weathering when used for signboard or general purpose, due to its superior adhesive strength between zinc layer and paint, unlike galvanized steel which requires weathering or pre-treatment. Bending Lock-forming Impact Test OT-Bending Good Good No Peel Off No Peel Off No Peel Off UNION STEEL MFG.CO., LTD. 16 / 17

10 COLORLUME PREPAINTED STEEL SHEET Colorlume refers to color painted Unilume, which retains Unilume-unique characteristics of superior corrosion-resistance and heat resistance. COLORLUME UNION STEEL MFG.CO., LTD. 18 / 19

COLORLUME PREPAINTED STEEL SHEET PREPAINTED STEEL SHEET What is Colorlume

retains natural beauty in our living environment, and opens new culture of

Colorlume, in other words, color painted Unilume of aluminum-zinc alloy steel has

Colorlume, which is beautiful and varied in colors, has opened a new chapter for

11 COLORLUME PREPAINTED STEEL SHEET PREPAINTED STEEL SHEET What is Colorlume PREPAINTED STEEL SHEET Naturalism Colorlume, added natural color to Unilume, retains natural beauty in our living environment, and opens new culture of construction based on humanity. Colorlume, in other words, color painted Unilume of aluminum-zinc alloy steel has Unilume-unique characteristics of superior corrosion-resistance and heatresistance. Colorlume, which is beautiful and varied in colors, has opened a new chapter for construction culture by satisfying customers both in the superior performance and esthetic factor. Union Steel has been supplying, metric tons of pre-painted products in various colors since the expansion of state-of-the art color coating line (annual capa. 1, metric tons) in 22. COLORLUME UNION STEEL MFG.CO., LTD. 2 / 21

produced by painting advanced steel product of Unilume with technology accumulated

culture with various kinds of colors and the pursuit of economical efficiency.

6 6 ~ 1,6 6 ~ 5, 2 M/T 5861 Based on the Kesternich test and acid rain contamination

12 COLORLUME Usage Production Availability Colorlume Usage Union Steel's Colorlume, which is produced by painting advanced steel product of Unilume with technology accumulated in the last 2 years,has been serving to the creation of new fashion of construction culture with various kinds of colors and the pursuit of economical efficiency. Size Availability Capacity Thickness ( ) Width ( ) Sheet Length ( ) Coil Weight(Max) Coil Inner Diameter ( ) 25,.35 ~ ~ 1,6 6 ~ 5, , t/year.35 ~ ~ 1,6 6 ~ 5, 2 M/T 5861 Based on the Kesternich test and acid rain contamination test of Colorlume and Prepainted Galvanized Steel, Colorlume proved to be much superior in corrosion resistance - particularly, at the forming and welding portion. Colorlume Sheet COLORLUME G-9 Galvanized UNION STEEL MFG.CO., LTD. 22 / 23

13 COLORLUME MANUFACTURING PROCESS PROCESS COLORLUME PROCESS UNION STEEL MFG.CO., LTD. 2 / 25

Seoul Head Office Busan Plant Busan Office Honam Office Gi-Heung Plant Tel : 2-2222-11 Fax : 2-2222-275 FERRUM TOWER 66, Suha-Dong, Jung-Gu, Seoul, Korea, Zip 1-21 Tel : 82-2-2222-11 Fax :

14 Seoul Head Office Busan Plant Busan Office Honam Office Gi-Heung Plant Tel : Fax : FERRUM TOWER 66, Suha-Dong, Jung-Gu, Seoul, Korea, Zip 1-21 Tel : Fax : Tel : Fax : , Kamman-dong, Nam-ku, Busan, Korea Tel : Fax : Tel : ,5958 Fax : , Kamman-dong, Nam-ku, Busan, Korea Tel : ,5958 Fax : Tel : ~9 Fax : Floor 6, Kwangju Trade Center Bldg, Woosan-dong, Kwangsan-Ku, Kwangju, Korea Tel : ~9 Fax : Fax 883-7, Joong-ri, Dongtan-myun, Hwasung, Gyeonggi-do, korea Tel : Fax : Overseas Subsidiaries The Best Hi-Tech Steel Company In the World NEW YORK LOS ANGELES TOKYO MEXICO UNION STEEL AMERICA, CO. A Division of Dongkuk International Inc. Kelby Street 11th floor, Fort Lee, NJ 72 U.S.A Tel : Fax : UNION STEEL AMERICA, CO. A Division of Dongkuk International Inc Megellan Drive, Torrance, CA 952 U.S.A Tel : Fax : DONGKUK CORPORATION 7th Floor, Seika Bidg., Nihonbashi-Kayabacho, Chuo-ku, Tokyo 13-25, Japan Tel : Fax : UNION STEEL MEXICO,S.A DE C.V. Ave International #33 Parque Industrial Huinala, Apodaca, Nuevo Leon, Mexico C.P 6665 Tel : SALES DIVISION IN CHINA Room 171 The Modern International Industrial Design Mansion No.81, Hongqiao Road, Liyuan Economic Development Zone, Wuxi City, Jiangsu 2172,China Tel : Fax : ~9 UNION STEEL SHANGHAI REPRESENTATIVE OFFICE Room 236, ShengGao International Building No.137, XianXia Road, Shanghai 251,China Tel : Fax : UNION STEEL GUANGZHOU OFFICE Room 21, Guangzhou Goldlion Tower, No.138, TianHe TiYu Dong Road, Guangzhou,Guangdong 5162, China Tel : Fax : WUXI CHANGJIANG METAL CO., LTD. WUXI WORKS Yuqi Town, Huishan, Wuxi City, Jiangsu 21183, China Tel : Fax : UNION STEEL CHINA Xiang Zone Jiangyin Riverside Economy Development Area, Jiangyin City, Jiangsu 212, China Tel : Fax : ~9 Xiang Zone Jiangyin Riverside Economy Development Area, Jiangyin City, Jiangsu 212, China Tel : Fax :

GI-110401

GI-110401 G.I HotDip Galvanized Steel www.eunionsteel.com web.unionsteel.co.kr Seoul Head Office Tel : 0222220114 Fax : 0222220275 FERRUM TOWER 66, SuhaDong, JungGu, Seoul, Korea, Zip 100210 Tel : 82222220114 Fax