Head OfficeSuha-dong 50, Jung-gu, Seoul, KoreaPhone: 82-2-317-1114 Fax: 82-2-317-1160

Pohang Works880, Songdong-ri, Daesong-myun, Pohang, KoreaPhone: 82-54-271-5534 Fax: 82-51-271-5302

Incheon Works1 Songhyun-dong, Dong-ku, Incheon, Korea Phone: 82-32-760-5127 Fax: 82-32-773-0027

Busan Works370-97 Shinpyong-dong, Saha-ku, Busan, KoreaPhone: 82-51-220-3015 Fax: 82-51-220-3021

http://www.dongkuksteel.com

International Sales Division E-mailexport@dongkuk.co.kr

S T E E L P L A T E

Brief History

July 1954Dongkuk Steel Mill Co., Ltd. was founded with an investment capital of 1 million won.August 1954 Start up of rolling operations at new plant in Busan.March 1963Start up of steelmaking plant in Busan.April 1966 Start up of first electric arc furnace No. 1 in Busan.December 1967Start up of oxygen plant in Busan.March 1970 Start up of 2 electric arc furnaces No. 2 and 3 in Busan.February 1971 Start up of plate mill in Busan.November 1972Start up of operations of new plant in Incheon. (3 Liquid Iron Furnaces, 7 ElectricArc Furnaces, 3 Rolling Mills, etc.)October 1974 Start up of continuous caster in Busan.June 1976 Start up of two 25 ton electric arc furnaces in Incheon.August 1979 Start up of continuous rolling plant in Incheon.May 1980 Start up of one 50 ton electric arc furnace in Busan.September 1981Start up of No. 2 rolling plant in Busan.October 1982 Start up of No. 3 rolling plant in Busan.August 1983 Start up of No. 2 and 3 rolling plants in Incheon.

September 1984 Start up of oxygen plant in Incheon.

April 1987 Addition of 2 strand continuous caster to 50 ton furnace in Busan.June 1987 Addition of 1 strand continuous caster to 40 ton furnace in Busan.April 1988Initial public offering of stocks.March 1991Start up of No. 1 plate mill in Pohang.April 1993 Start up of 100 ton direct current electric arc furnace and rolling mill inIncheon.December 1995Construction of No. 2 plate and section mills started in Pohang.December 1995Sales reached in excess of 1 trillion won.January 1997Construction of new bar and shapes mill started in Pohang.November 1997Start up of new section mill in Pohang.December 1997 Start up of new No. 2 plate mill in Pohang.December 1998Shutdown of Busan Works.April 1999 Start up of New Bar and Shape mill in Pohang.August 1999 Start up of new plant operation in Busan.July 2000 Construction of palte mill and exporting plate production technology to Danieli & C. in Italy.November 2003 Sales surpass 2 trillion won mark.March 2004Construction starts on second harbor in Pohang.

The best companies are not simply the largest and most famous but those which garner the respect of their employees, customers andsociety at large. These same companies seek to maximize profits andsearch for long-term solutions.

Dongkuk Steel's vision for the future begins with value management. This means value creation through innovation. By tapping into proven areas of business that it has traditionally excelled in,Dongkuk Steel aims to establish value-added production lines, and to continually explore potential core businesses which can fuel growth.

Although there have been many changes in the marketplace over the last 50 years, a substance-focused business philosophy has allowed Dongkuk Steel to rapidly grow over that same time period.

It is my sincerest wish to make Dongkuk Steel into a more versatile company with future visions of “Change & Growth,” a company that will lead changes in production of iron and steel manufacturing in the future, both in quality and quantity.

Thank you for your continued support.

Chairman & CEO SAE JOO CHANG

Plates

Steel plates are value-added steel products used in diverseindustries such as shipbuilding, oceanic structures, boilers,bridges, large-scale oil pipelines, and steel structures. Dongkuk Steel manufactures a whole set of steel plates, rangingfrom those for general use to those for shipbuilding and high tensile strength steel, always in accordance with shipbuilding steel certification boards in eight major countries including the U.S. and Japan.

At Dongkuk Steel, we expedite the decision making process toalways ensure a sufficient number of slabs, the raw materialneeded for plate production. In particular, Dongkuk Steel’s No. 1and No. 2 plate mill, which have adopted a 4-high reverse rollingmill, including a rolling mill and a finishing mill, produce highprecision plates with virtually no quality deviations. This leads to high customer satisfaction as we meet demands asquickly as we do effectively. Dongkuk Steel is growing into a world-renowned company, with steel plates being our core strategicproduct.

The overall process is controlled by means of a state of the artcomputer system.The No.2 Plate Mill, which has an annual production capacity of 1.5 Million tons, has incorporated the latest technology in computer integrated manufacturing in orderto produce top quality plates.Its product size range covers all plate productsfrom 6mm to 120mm(1/4”~5”) in thickness and1,524mm to 4,100mm(60”~16”) in width.

The Roughing and Finishing Millsare 4-high reversible, and the MillStand Housings are the world’slargest single-cast mill housings.The Reheating Furnace utilizes theWalking Beam system and its reheatingcapacity is 235 tons/hr.The mill line consists of two millstands, the Roughing Mill and theFinishing Mill which are capable ofrolling products that exit the reheating furnaceat various temperatures.By incorporating the X-ray Thickness Gaugeand the Profile Gauge that interact with therolling process, we are able to produce plateswith accurate thickness and tight surfaceflatness tolerances.

We produce the best cut platesin our heavily equipped shearline.After the Mill Line, the product is levelled in theHot Leveller. Then the product passes throughone of the two cooling beds, the No.1 CoolingBed (Light Line) for plates less than 50mm(2”)in thickness and the No.2 Cooling Bed (HeavyLine) for plates over 50mm(2”) in thickness.

The Walking Beam type of movement of thecooling beds enables us to eliminate damageson the surface of the product. The shearlineconsists of a Crop Shear, two Double SideShears and Slitter combination, and two EndShears, which are heavy shearing equipmentsthat cut the product into the final sizesrequested by the customer. Thicker size platesthat require gas cutting are processed in ourGas Cutting Bay.

Our centralized laboratory is fullyequipped with a state of the artlaboratory equipment in order tosatisfy our customers’requirements.

Samples are taken from the plates for qualitytesting, and they are transported to our state of the art central laboratory by a network ofconveyor belts, where Gamma rays are used toexactly measure the thickness and length. Our laboratory is also capable of performingproduct surface inspections.In response to our customers’ request, wehave also installed a separate facility forperforming Ultrasonic Tests.

We are always striving to satisfythe demands of our customers.

The technical force of Dongkuk Steel is alwaysby the customer’s side in order to help themdecide the most appropriate productspecification for their intended purposes.We also provide an exact delivery schedule aswell as all the alternatives for a safe and efficientmethod of transportation.Over the years, we have acquired a solidoverseas sales experience and haveestablished a proven system for on timeoverseas delivery.At Dongkuk Steel, our top priority is totalcustomer satisfaction by means of highproduct quality and dedicated customerservice.

Pohang Works Incheon Works Busan Works

Dongkuk International, Inc.

established in 1960, was incorporated in1980, and has developed into anextremely reliable and stable company.With offices in Los Angeles, New Jersey,Chicago and Houston, the company isvery active in marketing throughout thewhole America.Dongkuk International constitutes thebridgehead for a truly internationalDongkuk Steel Group.

Dongkuk Corporation

in Japan was established in 1980, andplays a pivotal role to market and sell thevarious steel products of Dongkuk SteelGroup to this advanced nation with agood reputation from customers.

3.84 Million TonsTOTAL STEELPRODUCTS

Plates 2.47MT

Section 0.82MT

Deformed bar0.55MTTotal Annual Production

STEEL MAKINGCAPACITY

1.29Million Tons

1.51 Million TonsTOTAL STEELPRODUCTS

Deformed bar 1.38MT

Section 0.13MT

Total Annual Production

STEEL MAKINGCAPACITY

1.56Million Tons

0.29 Million TonsTOTAL STEELPRODUCTS

Section 0.17MT

Deformed bar 0.12MT

Total Annual Production

Business Network

Seoul Head OfficeTokyoShanghai Los Angeles

New York

Overseas Networks

LOS ANGELES BRANCHDONGKUK INTERNATIONAL, INC.19750 Magellan Drive Torrance, CA. 90502, USAPhone: 1-310-523-9595 Fax: 1-310-523-9599

NEW YORK OFFICE DONGKUK INTERNATIONAL, INC.460 Bergen Boulevard palisades park, NJ. 07650, USAPhone: 1-201-592-7600 Fax: 1-201-592-8795

TOKYO BRANCH DONGKUK CORPORATION 6th Floor. Haniuda Building 2-7-6, Kayaba-cho,Nihonbahsi chuo-ku, Tokyo 03-0025, JapanPhone: 81-3-5623-5762 Fax: 81-3-5626-5722

SHANGHAI REP. OFFICEDONGKUK STEEL MILL CO., LTD.Room 1068-B, Far East International PlazaExhibition No. 317, Xianxia Road, Shanghai, ChinaPhone: 86-21-6278-0114 Fax: 86-21-6278-0231

Seoul Head Office

Incheon Works

Pohang Works

Busan Works

The heart of the global steelindustry in the 21st century

Covering 210 acres, our plants produce

an annual output of 3.84 million tons of

H-sections, including steel plates and steel

bars. Since October 1999, when we

upgraded our facilities at Pohang, the

plant has remained competitive in terms of

facilities and technology not only by local

standards, but by international ones.

The first direct current electricarc furnace in Korea installed

Ever since it installed a direct current

electric arc furnace for the first time in

Korea, the Works has been producing 1.5

million tons of deformed bars and sections

a year at a continuous casting plant and a

rolling plant equipped with cutting edge

facilities on the 69-acre land.

A main base for high value-added products

Flagship products include asymmetric

angles, three-inch angles and profiles.

In particular, 100 percent of our three-inch

angles are exported to overseas markets,

which imply top-notch technology.

The industry is also giving a good deal of

attention to F-type profiles, another high

value-added product which Pohang

Works has successfully managed to

produce in a test run.

International Standards and Grades

S355 JRS355 JO

S355 J2G3S355 K2G3

JIS G3106SM490A, SM490B

SM490YASM490YB

SM520, SM570

JIS G3101SS400

SS490, SS540

NV(Det Norske

Veritas)

GL(Germanischer

Lloyd)

DIN 17100ST37-2, ST44-2

ST44-3

BV(Bureau Veritas)

BS 4360GR 43A, B, CGR 50A, B, C

ABS GR A, B, D,AH32,DH32AH36, DH36

ASTMA572 GR 50, 60, 65

A709 GR 50A588 GR A, B, C, D

ASTMA36

A283 GR C, DA285 GR C

High pressureand corrosion

resistance

Buildings,Bridges, andvarious typesof structure

CSA G40. 2133G50G60G

E 24-3, 4E28-3, 4

E36-2,3,4

AS3678GR250

AS3678GR300GR350GR400

Presence ofCr, Cu, Ni

for corrosionresistance

CSA G40. 2150R

ASTM A242ASTM A588

A,B,C,K

Buildings,Bridges, andvarious typesof structure

CSA G40. 2138W, 44W50W, 55W60W, 70W

DIN 17100ST52-3

Machine partsand structures

DIN 17200/10/11CK45, C45CK50, C50CK55, C55

AISI MN061015

1055

Hull structurefor steel vessel

LRS (Lloyd’s Register

of Shipping)

High pressureand resistance

ASTM A285ASTM A515ASTM A516

CHARACTERISTICS& APPLICATIONS

U.S.

U.K.

CANADA

FRANCE

GERMANY

NORWAY

AUSTRALIA

S235 JRS235 JRG2

S235 JOS275 JRS275 JO

JIS G4051S45CS50CS55C

NK(Nippon Kaiji

Kyokai)

JIS G3118SGV410, 450,480

JIS G3115SPV235, 315, 355

SPV450, 490

JIS G3114SMA400SMA490SMA570

JAPAN

EN

PRODUCT GENERAL STRUCTURAL MACHINE PLATES FOR PLATES FOR PRESSURE CORROSIONDESCRIPTION STRUCTURAL WELDING STRUCTURAL SHIPBUILDING LINE PIPES VESSELS RESISTANT

API 5LX-X-42, 46, 52, 56,

60, 65, 70~

Approved Specifications - Plates for Shipbuilding

GRADES A, B D AH32 AH36 DH32 DH36

KR 50 35 35 35 25 25

ABS 55 35 35 35 25 25

LR 50 35 35 35 25 25

NV 51 35 35 35 25 25

NK 50 35 35 35 25 25

GL 50 35 35 35 25 25

BV 50 35 35 35 25 25

LINA 50 35 35 35 25 25

Maximum Thickness (T in mm)

15 15 15 15

18 18 18 18 18 18 18

18 18 18 18 18 18 18

24 24 24 24 24 24 24 24 24 24 24 24 24 24 24

24 24 24 24 24 24 24 24 24 24 24 24 24 24 24

25 25 25 25 25 25 25 25 25 25 25 25 25 25 25

25 25 25 25 25 25 25 25 25 25 25 25 25 25 25

25 25 25 25 25 25 25 25 25 25 25 24 22 21 21

25 23 25 25 25 25 25 25 23 21.5 20 19 17.5 16.5 16.5

24 19 25 25 25 24 22 20.5 19 18 16.5 16 14.5 13.5 13.5

20.5 16.5 25 24 22.5 20.5 19 17.5 16.5 15.5 14 13.5 12.5 12 11.5

18 14 23.5 21.5 19.5 18 16.5 15 14 13 12 12 11 10.5 10

16 12.5 21 19 17 16 14.5 13.5 12.5 12 11 10.5 9.5 9 9

13.5 11 17 15.5 14.5 13.5 12.5 11.5 11 10 10 9

12 10 15.5 14.5 13 12 11.5 10.5 10 9 9 8.5

11.5 9.5 14.5 13 12 11.5 10.5 10 9.5 8.5 8.5

10.5 8.5 13.5 12.5 11.5 10.5 10 9 8.5 8 8

10 8 12.5 11.5 10.5 10 9 8.5 8 7.5

9 7.5 11.5 11 10 9 8.5 8 7.5 7

8.5 7 11 10 9.5 8.5 8 7.5 7 6.5

8 6.5 10.5 9.5 9 8 7.5 7 6.5 6.5

8 6.5 10 9 8.5 8 7.5 7 6.5 6

7.5 6 9.5 8.5 8 7.5 7 6.5 6 5.5

7 6 9 8 7.5 7 6.5 6 6 5.5

7 5.5 8.5 8 7.5 7 6.5 6 5.5 5

6.5 5.5 8.5 7.5 7 6.5 6 5.5 5.5 5

6 5 8 7.5 6.5 6 6 5.5 5 5

Max. Length (m)

1219≤≤

��1500

1500≤≤

��1800

1800≤≤

��2000

2000≤≤

��2200

2200≤≤

��2400

2400≤≤

��2600

2600≤≤

��2800

2800≤≤

��3000

3000≤≤

��3200

3200≤≤

��3500

3500≤≤

��3600

3600≤≤

��3800

3800≤≤

��3900

3900≤≤

��4000

4000≤≤

≤≤4100

6≤≤T��7

7≤≤T��8

8≤≤T��9

9≤≤T��10

10≤≤T��12

12≤≤T��15

15≤≤T��20

20≤≤T��25

25≤≤T��30

30≤≤T��35

35≤≤T��40

40≤≤T��45

45≤≤T��50

50≤≤T��55

55≤≤T��60

60≤≤T��65

65≤≤T��70

70≤≤T��75

75≤≤T��80

80≤≤T��85

85≤≤T��90

90≤≤T��95

95≤≤T��100

100≤≤T��105

105≤≤T��110

110≤≤T��115

115≤≤T��120

120≤≤T��125

125≤≤T��130

130≤≤T��135

135≤≤T��140

140≤≤T��145

145≤≤T��150

Width(mm)

Thick(mm)

INQUIRE

General & Machine Structure

Welded Structure

Pressure Vessel

STRUCTURALSTEEL PLATE

STEEL PLATEFORSHIPBUILDING

STEEL PLATEFORBOILERS & PRESSUREVESSELS

WEATHERING & CORROSION RESISTANT STEEL

STEEL PLATEFOR LINE PIPE

STEEL PLATEFOR SPECIALAPPLICATIONS

USAGE EXAMPLES