고객의신뢰로커가는기업동아스틸 DOSCO, the company that grows on you. Our company strives for continuous development of new products and quality improvement. 동아스틸 ( 주

동아스틸주식회사 본사 Head Office 부산광역시사상구감전동 152-2 번지우창빌딩 405 호 Room 405 Woochang B/D, 152-2, Gamjeon-dong, Sasang-gu, Busan TEL 051-320-3000 / FAX 051-326-8883~4 광양공장 Gwangyang Factory 전라남도광양시태인동 1653-12 번지 1653-12, Taein-dong, Gwangyang City, Jeonranam-do TEL 061-797-8080 / FAX 061-797-8099 경인영업소 Kyungin Branch Office 경기도시흥시정왕동 2210 랜드프라자 207 207 Landplaza, 2210, Jeongwang-dong, Siheung City, Gyeonggi-do, Korea TEL 031-434-9981 / FAX 031-434-9987 THE FUTURE OF DOSCO DEPENDS ON OUR CLIENT S SUCCESS 대구영업소 Daegu Branch Office 대구광역시북구산격동 1626 1767, Sangyeok-dong, Buk-gu, Daegu TEL 053-381-1781 / FAX 053-381-1784 DOSCO America, Inc. 19401 Vermont Ave, Suite#1106, Torrance, CA90502, USA TEL +1-310-527-0086 / FAX +1-310-527-2270

고객의신뢰로커가는기업동아스틸 DOSCO, the company that grows on you. Our company strives for continuous development of new products and quality improvement. 동아스틸 ( 주 ) 은 1987년설립후발전을거듭하며 2003년 7월광양공장에연간 20만톤의 CGL( 연속용융아연도금 ) 설비, 10 중경관설비, 그리고국내최초내면까지도장한슈퍼칼라각관설비등을갖추어고객의신뢰를한단계높였습니다. 또한품질이뒷받침된고품질의제품을공급함으로써, 고객의만족으로성장하고있는동아스틸 ( 주 ) 입니다. 인간존중, 미래창조, 고객신뢰 라는동아스틸 ( 주 ) 의경영이념을고객에게전하기위해끊임없는연구개발등의노력을하고있습니다. 보다나은품질, 보다우수한제품을전하기위해노력하는기업이되겠습니다. 변화를주도하는종합철강회사, 고객의사랑으로성장하는기업, 동아스틸 ( 주 ) 입니다. Since the establishment of DOSCO in 1987, We have experienced continuous growth while providing the best quality products to our clients. CONTENTS With our technical expertise, we have produced 200,000 tons a year of Continuous Galvanized, 100,000 tons a year of 10 tubing and 50,000 tons of super color square tubing with inner-rust preventive finish, first ever in Korea, all with on time deliveries to serve our valuable clients. Dosco s management philosophy is based on Human Respect, Future innovations, and Customer trust in providing top quality to our clients with endless research and development. DOSCO, the company with ever changing vision will always offer you support as a complete steel company. 2 경영이념 / Vision 5 연혁 / Company History 6 생산설비 / Production Facilities - 연속아연도금라인 / Continuous Galvanizing Line - 조관라인 / Tubing Line - 슈퍼칼라도장라인 / Super Color Tubing Line - 형강라인 / Forming Line - 슬리팅라인 / Slitting Line 12 주요생산품 / Main Products 14 표준규격 / Standard Specifications 23 기술개발및인증 / Technical Development and Certification 각에서원으로무한의가능성을표현하고 Pipe Maker를형상화한다. DOSCO는영문 (Dong-A Steel Company) 의머리글자이며, 두줄은균형과화합의의미를부여한다. DOSCO is derived from the first syllable of Dong-A Steel Company, and the two lines represent balance and unity.

연혁 [ Company History ] 인간존중 미래창조 고객신뢰 Human Respect Future Innovation Customer s Trust Sep. 1987. 회사설립 ( 동아강제공업사 ) Apr. 1991. Jan. 1994. Company established as DONG-A STEEL PIPE CORP. 동아강제주식회사로법인전환 Company incorporated as DONG-A STEEL PIPE CO., LTD 동아강제주식회사제2공장완공 The second factory completed. 본사 Head Office Mar. 1994. 제2공장 4 강관생산체제 Pipe production expanded to include 4 Tubing line. May. 1995. 대표이사변경 ( 김종주 김준형 ) CEO changed From Kim Jong-joo to Kim Jun-hyeong. May. 1995. Dec. 1996. Sep. 1997. 무역업등록 Registered with the Korea Trade Association. 제1공장소재생산라인을제2공장으로이전설치 The material production line moved from the first factory to the second factory. 제2공장칼라 C형강설비완료및생산 The second factory equipped with the color C-section production facility. 미국법인 DOSCO America, Inc. Aug. 2000. 상호변경 < 동아강제 ( 주 ) 동아스틸 ( 주 )> Aug. 2002. Company name changed from DONG-A STEEL PIPE CO., LTD. to DONG-A STEEL CO., LTD. 부산공장 HSB / ISO 9002: 1994 품질경영시스템인증서획득 Busan Factory Certified by HSB and ISO 9002: 1994 Quality Control Systems Certification by KSA. Jul. 2003. 광양공장준공 C.G.L, 조관 (10, 5, 2 ), SHEAR, SLITTER, S.C.P Gwangyang factory completed with Continuous Galvanizing Line, 10, 5, 2 tubing line, shearing, slitting, S.C.P Line, etc. Apr. 2004. 특허및실용신안등록 ( 내면이도장된각관과그생산시스템 ) Obtained patent for the inner-coated tubes and the manufacturing system. Jun. 2004. 광양공장 KSA / ISO 9001: 2000 품질경영체제인증서획득 Certified for ISO 9001: 2000 Quality Control Systems Certification by KSA. 광양공장 Gwangyang Factory 경인영업소 Kyungin Branch Office Nov. 2004. KS 제품인증획득 ( 일반구조용각형각관 ) Obtained Korea Industrial Standard Certification (Carbon Steel Tubes for General Structural Purposes) Jan. 2005. 미국법인설립 DOSCO America, Inc. established. 마음과마음을이어주는징검다리를고객의가슴속에만듭니다. 한조각의철에도따뜻한마음을담기위해노력하는동아스틸고객여러분께감동을전하는대한민국의종합철강회사입니다. Our goal is to work with you to develop the most advanced steel products while achieving the highest quality through our advanced automated processes. 대구영업소 Daegu Branch Office Sep. 2005. JIS 제품인증획득 ( 일반구조용각형강관, 일반구조용탄소강관 ) Jan. 2006. Obtained Japanese Industrial Standard Certification (Carbon Steel Square and Carbon Steel Tubes for General Structual Purposes) 기술연구소설립 Organized technical research center at Gwangyang factory Mar. 2006. KS 제품인증추가획득 ( 일반구조용탄소강관, 배관용탄소강관, 압력배관용탄소강관 ) Obtained Korea Industrial Standard Certification Mar. 2006. (Carbon Steel Tubes for General Structual Purposes, Carbon Steel Pipes for General Structual Purposes Carbon Steel Pipes for Pressure Service) 중국지사설립 Dosco China office opened in Beijing Jun. 2009. Apr. 2010. KS 백관인증획득 Obtained korea Industrial Standard Certification (Carbon Steel Pipes for ordinary piping-white pipe) 광양공장조관기증설 (2", 1¼") Gwangyang Factory equipped with the 2, 1¼ tubing line

생산설비 [ Production Facilities ] 연속아연도금라인 Continuous Galvanizing Line Continuous Galvanizing Line Tubing Line Super Color Tubing Line Forming Line Slitting Line 6 21세기국가산업기술력신장의일환으로연속아연도금라인을도입하여철강재가공분야의기술력을한층더발전시키는계기가될것입니다. C.G.L 라인은중앙컴퓨터에의해생산설비가제어 운용되며특수장치및검사장비 (Xray) 로철판의도금량을일정수준 (~600g/ m2 ) 으로유지시키는고도의기술이활용된설비로일반구조용탄소강관, 일반구조용각형강관, 비닐하우스용, 울타리용구조강관, 비계용강관, 차량선박용등에사용합니다. We have introduced a C.G.L line in order to contribute to national industrial development in the 21st century. The C.G.L line enhances our steel product processing technology. This C.G.L is line controlled and operated by a central computer and designed to maintain the steel plate coating amount at a certain level(~600g/ m2 ). It does this using various special high-tech mechanisms and testing devices, including X-ray. This line is used to process carbon steel pipes and angled steel pipes for ordinary structure as well as for the steel pipes for green houses, fences, scaffolds, vehicles and vessels. HGI / P.O. Skelp Thickness : 1.2 ~ mm( ~ ⅛ ) Width : 600mm(max.23½ ) 내경 (I.D) : 508mm(20 ) 외경 (O.D) : 900 ~ 2,000mm(35 ~ 80 ) Hot Galvanized Steel Coils 광양공장 Gwangyang Factory 제품특성 Product Characteristics 강판의표면조도및균일성우수. 아연도금으로내부식성이우수함. Zero, Minimized, Regular spangle로외관이수려함. 최적의용융아연도금로제어로도금부착량이균일함. 아연부착량은양면 120 ~ 600g/ m2. Superior surface roughness and uniformity of steel pipes Outstanding corrosion-resistance due to galvanization Beautiful appearance due to Zero,Minimized, Regular spangle Uniformed coating due to the optimized zinc melting pot control Availability of zinc coating : 120 ~ 600g/ m2 on both sides 설비명 Facility 제품 Thickness 생산폭 Width 아연부착량 Zinc Coating 설비능력 Capacity C.G.L 연속아연도금설비 1.2 ~ mm 200 ~ 600mm 120 ~ 600g/ m2 (Both surface) 200,000 ton/year 7 공정도 Production Process

조관라인 Tubing Line 슈퍼칼라도장라인 Super Color Tubing Line Continuous Galvanizing Line Tubing Line Super Color Tubing Line Forming Line Slitting Line Continuous Galvanizing Line Tubing Line Super Color Tubing Line Forming Line Slitting Line 8 상하수도, 공업용수, 오일, 가스수송, 선박과토목, 건축, 철탑, 발판, 지주, 난간및울타리, 지면미끄럼방지말뚝, 자동차, 그밖의구조물등의강관제품생산설비 In-line process of square and rectangular tubes for fences, engineering, construction, steel towers, scaffolds, cars, supports and handrails, water-supply and drainage, industrial water, gas carriage, vessels. 광양공장 Gwangyang Factory 광양공장 Gwangyang Factory 설비명 Facility 생산규격 Size 제품 Thickness 제품길이 Length 설비능력 Capacity P - 1 Ø21.7~Ø60.5 20 ~ 50 1.2 ~ 3.9mm ~ 12.0m 30,000ton/year P - 3 Ø21.7~Ø60.5 20 ~ 40 1.2 ~ mm ~ 10.0m 30,000ton/year P - 4 50 ~ 100 1.4 ~ mm ~ 12.0m 40,000ton/year P - 5 Ø139.8~Ø267.4 100 ~ 200 4.1 ~ 9.5mm ~ 15.0m 100,000ton/year P - 6 Ø15.9~Ø31.8 12.7 ~ 25 0.8 ~ 1.8mm ~ 12.0m 15,000ton/year 설비명 Facility 생산규격 Size 제품 Thickness 제품길이 Length 설비능력 Capacity SCP 40 ~ 200 1.2 ~ 9.5mm ~ 12.0m 50,000ton/year 토목, 건축, 기계, 조선등다양하게사용되고있는일반구조용및기계구조용강관의내 외면도장설비 In-line coating process for internal and external coating of super color tubes, used in engineering, construction, machinery and ship building applications. 9 공정도 Production Process 공정도 Production Process

형강라인 Forming Line 슬리팅라인 Slitting Line Continuous Galvanizing Line Tubing Line Super Color Tubing Line Forming Line Slitting Line Continuous Galvanizing Line Tubing Line Super Color Tubing Line Forming Line Slitting Line 광양공장 Gwangyang Factory 광양공장 Gwangyang Factory 10 설비명 Facility 생산규격 Size 제품 Thickness 제품길이 Length 설비능력 Capacity C - 1 60 30 10mm 150 50 20mm ~ mm 6 ~ 12m 30,000ton/year 공장및조립식주택건설용등건축자재인 Color 및 Clean Room에사용하는 Z형강, H.G.I C형강, Black C형강과상용차차체등에소요되는다양한포밍제품의생산설비 In-line Process of H.G.I and black section shaped steel products used for factory, assembled housing, color or clean rooms, as well as commercial, industrial and automobile applications. 강관, 형강및미니강판의원재료인스켈프 ( 강대 ) 생산설비 In-line slitting of steel coils for steel tubing, C-forming and mini steel plating. 설비명 Facility 절단 Thickness 절단폭 Width 설비능력 Capacity SLITTER#1 1.2 ~ mm 50 ~ 1,250mm 60,000ton/year SLITTER#2 1.2 ~ mm 50 ~ 1,650mm 300,000ton/year SLITTER#3 1.2 ~ mm 50 ~ 1,250mm 90,000ton/year 11 공정도 Production Process 공정도 Production Process

주요생산품 [ Main Products ] 일반구조용탄소강관 배관용탄소강관 산세강대 아연도금 Z 형강 CARBON STEEL TUBES FOR GENERAL STRUCTURAL PURPOSE 토목, 건축, 철탑, 족장, 지주등 For Engineering, Building, Steel Towers, Props including foot props, etc. KS D 3566(STK) JIS G 3444(STK) CARBON STEEL PIPES FOR ORDINARY PIPING 상하수도, 공업용수, 관개용수, 오일및가스수송, 저수용, 소화전, 선박및기타 For City & Industrial Water system, Irrigation & Agricultural Water systems, Oil & Gas Supplys, Sprinklers, Ship Piping, etc. PICKLED & OILED STEEL COILS 일반구조용, 자동차용, 가전용, DRAWING용, PANEL용등 For Ordinary Structures, Cars, Home appliances, Drawing, Panels, etc. GALVANIZED Z-CHANNEL / PURLIN 토목, 건축, 자동화창고, 주차설비등 For Engineering, Building, Automatic Storehouse, Parking-Equipment, etc. KS D 3507 JIS G 3452 파형강관 압력배관용탄소강관 용융아연도강대및강판 철판 CORRUGATED STEEL PIPES 농업용수로, 배수관, 수로용암거소형터널등 Irrigation & Agricultural Water systems, Tunnel, etc. KS D 3590 CARBON STEEL PIPES FOR PRESSURE SERVICE 350 정도이하에서사용하는압력배관 KS D 3562 JIS G 3454 HOT GALVANIZED STEEL COILS 일반구조용, V/H, C-CHANNEL, 비닐하우스용강관등 Steel pipes for ordinary structures, V/H, C-Channel, Green house, etc. KS D 3502 SHEET 기계, 건축, 자동차, 철재가구, 보호벽, 선박등 For Machinery, Building, Motorcar, Steel Funiture, Making Walls, Ship piping, etc. 일반구조용각형강관 CARBON STEEL SQUARE TUBES FOR GENERAL STRUCTURAL PURPOSE 토목, 건축, 철탑, 콘테이너, 자동차, 자동화창고, 주차설비등 For Engineering, Building, Cars, Steel Towers, Automatic Storehouses, Containers, Parking Equipment, etc. KS D 3568(SPSR) JIS G 3466(STKR) 단관비계 STEEL PIPES SCAFFOLDING 조립식비계 FRAME SCAFFOLDING 강관지주 STEEL PIPE SUPPORT 슈퍼칼라도장각관 SUPER COLOR TUBES 아연도금각관 GALVANIZED SQUARE TUBES 건축, 난간, 지주, 기계, 울타리등 For Building, Hand Rail, Support, Machinery, Fence, etc. BS 구조용강관 STEEL TUBES FOR BS STRUCTURAL PURPOSE 건축, 교량, 기계, 자동차, 자전거, 전주, 틀비계, 철재가구, 지주, 난간등 For Building, Bridges, Machinery, Motorcars, Bicycles, Electric Light Posts, Scaffolding, Steel Funiture, Supports, Hand Rails, etc. 아연도금 C형강 GALVANIZED C-CHANNEL 칼라C형강 COLOR C-CHANNEL 건축, 기계, 주차설비, 축사, 교량등 For Building, Machinery, Parking Equipment, Cattle Sheds, Bridges, etc. KS D 3530

표준규격 [ Standard Specifications ] 14 용융아연도금강판및강대 기계적성질및표시 Mechanical Characteristics & Thickness 종류의기호 Designation of grade 항복점 Y.P(N/ mm2 ) min. 인장강도 9min. 연신율 E.L(%) min. 기계적성질 Mechanical Characteristics 굽힘성 (180 ) Bend Test 표시 mm 미만 Thickness<mm 표시 mm 이상 3.0mm 미만 mm Thickness < 3.0mm [ Hot-dip Zinc-coated ] Steel Sheets and Coils KS D 3506 (JIS G 3302) 표시 3.0mm 이상 Thickness > 3.0mm Z27, Z35 Z45, Z60 Z27 Z35 Z45, Z60 Z27, Z35 Z45, Z60 SGHC - - - 1 2 1 2 2 2 2 SGH340 245 340 20 1 2 1 1 2 2 2 SGH400 295 400 SGH440 335 440 18 SGH490 365 490 16 SGH540 400 540 비고 ) 1) SGHC는일반적으로항복점 205N/ mm2이, 인장강도 270N/ mm2이상이다. ( 시험편 5호압연방향 ) 2) 열연원판을사용했을때는표시 mm이상에대하여적용한다. 3) 굽힘성수치는굽힘의안쪽간격으로서표시의판매수를나타낸다. 2 2 2 2 2 3 3 3 3 3 3 3 3 3 표시 Thickness(mm) 1.2 ~ 적용 Applications 일반용 General Purpose 구조용 Constructual Purpose Remark) 1) For SGHC, YS is 205N/ mm2 or over and TS is 270N/ mm2 or over. 2) For Hot-Rolled Steel, the above applies to mm or over thickness 3) Bend data indicates the number of samples put into the inside of bend sample. 도금의표면다듬질의종류및기호 Classification of coating surface finishes and their symbols 도금의표면다듬질의종류 Classification of coating surface finishes 기호 Symbols 비고 Remark 레귤러스팽글 Regular Spangle 미니마이즈드스팽글 Minimized Spangle 화학처리의종류및기호 Classification of chemical treatments and their symbols 화학처리의종류 Classification of chemical treatments 일반크롬산처리 Ordinary chromate treatment 인산염처리 Phosphate treatment 무처리 Nontreated R Z 기호 Symbol C P M 아연결정이일반적으로응고과정에서생성되어스팽글을가진것 Spangles as a result of the restricted growth of Zinc Crystals during normal Solidification 스팽글을아주미세화한것 Spangles obtained by restricted normal spangle formation to a minimum 도유의종류및기호 Oiling Classification and symbols 도금의종류 Oiling Classification 도유 Oiled 기호 Symbols 무도유 Not Oiled 스킨패스처리 Skin Passing 도금제품표면을매끄럽게하기위한스킨패스처리는주문자의지정에따른다. 이때기호는 S로한다. Skin Passing to obtain surface smoothness shall be specified by the purchaser. In this case, symbols shall be S. 양면의가같은도금의양면최소부착량및상당도금 Minimum Coating Mass on Both Surfaces for Sheets or Coils and Equivalent Coating Thickness (unit: g/ m2 (Both)) 치수허용차 Dimensional Tolerances 1) 허용차 Tolerances on Thickness 표시 Thickness 구분 Classification 도금의양면부착량표시기호 Symbol for coating mass on both surfaces 양면 3 점법평균부착량 (g/ m2 ) Average coating mass in triple-spot test on both surfaces 양면 1 점최소부착량 (g/ m2 ) Minimum coating mass at a single spot on both surfaces 상당도금 (mm) Equivalent Coating Thicknesses 주 ⑴ ( ) 안은인수 인도당사자사이의협정에따라적용할수있다. 1,200 미만 W < 1,200 나비 ( 일반용 ) Width(General Purpose) 1,200 이상 1,500 미만 1,200 W < 1,500 1,500 이상 1,800 미만 1,500 W < 1,800 1,800 이상 2,300 미만 1,800 W < 2,300 (unit: mm) 나비 ( 구조용 ) Width(Constructual Purpose) 1,600 미만 W < 1,600 1,600 이상 2,000 미만 1,600 W < 2,000 T < 2.0 ±0.17 ±0.18 ±0.19 ±0.22 ⑵ ±0.20 ±0.24 2.0 W < 2.5 ±0.18 ±0.20 ±0.22 ±0.26 ⑵ ±0.21 ±0.26 2.5 W < 3.15 ±0.20 ±0.22 ±0.25 ±0.27 ±0.23 ±0.30 3.15 W < ±0.22 ±0.24 ±0.27 ±0.28 ±0.25 ±0.35 주 ⑵ 나비 2,000mm 미만에대하여적용한다. 도금부착량 ( 비합금화 ) Zinc Coating Mass (Z06) ⑴ Z08 Z10 Z12 Z18 Z20 Z22 Z25 Z27 Z35 Z45 Z60 (60) ⑴ 80 100 120 180 200 220 250 275 350 450 600 (51) ⑴ 68 85 102 153 170 187 213 234 298 383 510 0.013 0.017 0.021 0.026 0.034 0.040 0.043 0.049 0.054 0.064 0.080 0.102 Remark⑵ Tolerance applies to width under 2,000mm Remark⑴ ( ) is negotiable according to both party s agreement. 1) 나비및직선도허용치 Tolerances on Width & Camber 나비 Width 열연원판을사용하는경우 Hot-rolled base meatal used 밀에지 (A) Mill Edge(A) W 1,500 +25 W > 1,500 0 커트에지 (B) Cut Edge(B) +10 0 (unit: mm) 직선도 Camber 임의의길이 2,000 에대해 5 5 in any 2,000 of length 15

일반구조용각형강관 Carbon Steel Square Tubes for General Structural Purposes KS D 3568 (JIS G 3466) 치수허용차 Dimensional Tolerances 화학성분및기계성질 Chemical Composition & Mechanical Properties 구분 Specified item and dimension 허용차 Dimensional tolerances 구분 Specified item and dimension 허용차 Dimensional tolerances 종류기호 Designation of grade KS(JIS) C Si 화학성분 (%) Chemical Composition Mn P S 기계적성질 (5 호시험편 ) Mechanical Properties 인장강도 TS(N/ mm2 ) 항복강도 Y.P(N/ mm2 ) SPSR400(STKR400) 0.25 - - 0.040 0.040 400 245 23 SPSR490(STKR490) 0.18 0.55 1.50 0.040 0.040 490 325 23 DOSCO SPSR290 - - - 0.050 0.050 290 - - 비고 ) 1. 굽힘성은주문자의요구가있을경우용접부분의굽힘시험을한다. 2. DOSCO SPSR290은 DOSCO 자체규격의종류기호입니다. Remark) 1. Bending Test can be done as per customer s request. 2. DOSCO SPSR290 is DOSCO s own designation of grade. 연신율 (%) EL 변의길이 Length of side 각면의평판부분의요철 Unevenness Dimensional of plate portion of each side 100 mm이하 100 mm or under ±1.5 mm 100 mm초과 Over 100 mm ±1.5% 변의길이 100mm이하 Side length 100mm or under 변의길이 100mm초과 Side length over 100mm 인접평판부분사이의각도 Angularity made by adjacent flat plate portions 0.5 mm 변의길이의 0.5% 이하 Within 0.5 of side length ±1.5 각부의치수 : S Dimension at corner: S Wall thickness 길이 Length 휨 Destraightness 용접에의해제조한관 Square steel tube manufactured by welding 이음매없는관 Seamless square steel tube 3t + 0 전체길이의 0.3% 이하 Within 0.3% of whole length 3mm미만 Under 3mm ±0.3mm 3mm이상 3mm or over ±10% 4mm미만 Under 4mm ±0.6mm 4mm이상 4mm or over ±15% 16 표준치수및중량 Nominal Size & Weight 1) 정방형 Square 치수 Size 20 20 25 25 30 30 40 40 50 50 60 60 75 75 100 100 125 125 150 150 175 175 200 200 Wall Thickness 1.2 1.2 1.2 5.0 5.0 5.0 5.0 중량 Weight (kg/m) 0.697 0.872 0.867 1.12 1.06 1.38 1.88 2.62 8 3.34 0 2.88 6 5.50 3.64 5.14 7.01 9.55 8.95 9.52 11.7 13.1 17.0 24.1 12.0 16.6 18.3 21.7 31.1 20.1 2 26.4 38.2 23.7 26.2 31.1 27.2 35.8 46.9 5 단면적 Area ( cm2 ) 0.865 1.123 1.105 1.432 1.345 1.752 92 3.332 3.032 4.252 5.727 3.672 5.172 7.007 4.632 6.552 8.927 12.17 8.852 12.13 14.95 16.67 23 30.67 15.33 21.17 23.36 27.63 39.67 25.67 28.36 33.63 48.67 30.17 33.36 39.63 34.67 45.63 59.79 66.67 단면 2 차모우먼트 Moment of Inertia( cm ) 단면계수 Section Modulus( cm3 ) 단면 2 차반지름 Radius of Gyration( cm ) Ix, Iy Zx, Zy ix, iy 0.53 0.52 0.769 0.67 0.65 0.751 1.03 0.824 0.965 1.27 1.02 0.942 1.83 1.22 1.17 1 1.54 1.15 5.79 2.90 1.56 7.73 3.86 1.52 11.7 4.68 1.96 15.9 6.34 1.93 20.4 8.16 1.89 20.7 28.3 36.9 41.3 57.1 75.5 98.6 140 187 226 249 311 408 376 506 553 641 865 896 982 115 10 158 10 145 10 159 10 186 10 219 10 283 10 362 10 399 10 6.89 9.44 1 11.0 15.2 20.1 26.3 27.9 37.5 45.3 49.9 6 8 60.1 80.9 88.4 103 138 120 131 153 210 166 182 213 219 283 362 399 7 4 0 2.99 2.95 2.91 2.85 3.97 3.93 3.89 3.87 3.79 3.65 4.95 4.89 4.86 4.82 4.67 5.9 5.89 5.84 5.69 6.93 6.91 6.86 7.95 7.88 7.78 7.73 1) 장방형 Rectangle 치수 Size 30 20 40 20 50 30 60 30 75 45 100 50 125 75 150 100 200 100 200 150 250 150 Wall Thickness 1.2 1.2 중량 Weight (kg/m) 0.868 1.124 1.053 1.375 1.88 2.62 2.13 2.98 3.99 2.88 6 5.50 3.64 5.14 7.01 9.55 6.95 9.52 11.7 13.1 17.0 12.0 16.6 21.7 31.1 20.1 26.4 38.2 23.7 31.1 45.3 35.8 5 단면적 Area ( cm2 ) 1.105 1.4317 1.3453 1.7517 92 3.332 2.172 3.792 5.087 3.672 5.172 7.007 4.632 6.552 8.927 12.17 8.852 12.13 14.95 16.67 23 15.33 21.17 27.63 39.67 25.67 33.63 48.67 30.17 39.63 57.67 45.63 66.67 단면 2 차모우먼트 Moment of Inertia( cm ) 단면계수 Section Modulus( cm3 ) 단면 2 차반지름 Radius of Gyration( cm ) Ix Iy Zx Zy ix iy 1.34 6 2.73 3.43 7.96 10.6 12.5 16.8 21.4 28.4 38.9 50.8 61.3 84.8 112 147 192 257 311 342 428 488 658 835 113 10 133 10 170 10 235 10 176 10 227 10 317 10 389 10 548 10 0.711 0.879 0.923 1.15 3.60 4.76 4.25 5.65 7.08 12.9 17.6 22.8 21.1 2 38.0 48.9 87.5 117 141 155 192 262 352 444 595 455 577 782 113 10 146 10 202 10 177 10 247 10 0.890 1.11 1.36 1.72 3.18 4.25 4.16 5.61 7.15 7.56 10.4 13.5 1 17.0 22.5 29.3 30.6 41.1 49.7 54.8 68.5 65.1 87.7 133 170 235 176 227 317 311 438 0.711 0.879 0.923 1.15 2.40 3.17 2.83 3.76 4.72 5.75 7.82 10.1 8.43 1 15.2 19.5 23.3 31.1 37.5 41.2 51.1 52.5 70.4 88.8 119 90.9 115 156 151 194 270 236 330 1.10 1.80 1.42 1.40 1.82 1.79 2.15 2.11 2.05 2.78 2.74 2.69 3.64 3.60 3.55 3.47 4.65 4.60 6 3 4.45 5.64 5.58 5.50 5.33 7.20 7.12 6.94 7.64 7.56 7.41 9.23 6 0.082 0.784 0.828 0.810 1.23 1.20 1.25 1.22 1.18 1.88 1.84 1.80 2.13 2.10 2.06 2.00 3.14 3.10 3.07 3.04 2.98 4.14 8 1 3.87 4.21 4.14 1 6.13 6 5.93 6.23 9 17

일반구조용탄소강관 Carbon Steel Tubes for General Structural Purposes 배관용탄소강관 Carbon Steel Pipes for Ordinary Piping KS D 3566 (JIS G 3444) KS D 3507 (JIS G 3452) 화학성분및기계성질 Chemical Composition & Mechanical Properties 종류기호 Designation of Grade 종류기호 Designation of Grade KS (JIS) C Si 화학성분 (%) Chemical Composition Mn P S 인장강도 T.S (N/ mm2 ) 기계적성질 (5호시험편 ) Mechanical Properties 굽힘성 (90 ) Bendiang Test 항복강도 Y.P (N/ mm2 ) 연신율 E.L (%) 안쪽반지름 50mm이하적용 Inner radius 50mm and under 편평성 Flat Test 편평사이의거리 (H) Distance between flat sides 종류기호 Designation of Grade KS (JIS) SPP(SGP) 구분 Division 흑관 Black pipe 백관 Galvanized pipe 비고 Remark 아연도금을하지않은관 Pipe without zinc coating 흑관에아연도금을한관 Pipe with zinc coating STK290 - - - 0.050 0.050 290-25 이상 6D ⅔D 18 STK400 0.25 - - 0.040 0.040 400 235 18이상 6D ⅔D STK500 0.24 0.35 0.30~1.30 0.040 0.040 500 355 10이상 8D ⅞D STK490 0.18 0.55 1.50 0.040 0.040 490 315 18이상 6D ⅞D STK540 0.23 0.55 1.50 0.040 0.040 540 390 16이상 6D ⅞D 비고 ) 굽힘시험은주문자의지정이있는경우에한하고바깥지름 50 mm이하의관에대하여적용하며, 편평시험대신에실시한다.(D 는관의바깥지름, 5 호시험편가로방향 ) Remark) Bending test limits to customer s special request and applies to OD 50 mm and under. Bending shall be tested to replace flat test.(d: Outer Dimuter) 치수허용차 Dimensional Tolerances 바깥지름 중량 단면적 단면2차모우먼트 단면계수 단면2차반지름 OD Thickness Weight Area Moment of Inertia Section Modulus Radius of Gyration (kg/m) ( cm2 ) ( cm ) ( cm3 ) ( cm ) 21.7 2.0 0.972 1.238 0.607 0.560 0.700 27.2 2.0 1.24 1.583 1.26 0.930 0.890 1.41 1.799 1.41 1.03 0.880 3 1.80 2.291 2.89 1.70 1.12 42.7 2.29 2.919 5.97 2.80 1.43 2.5 2.48 3.157 6.40 3.00 1.42 2.63 3.345 8.99 3.70 4 48.6 2.5 2.84 3.621 9.65 3.97 3 2.8 3.16 29 10.6 4.36 2 3.58 64 11.8 4.86 1 60.5 76.3 89.1 10 114.3 Class.1 Class.2 비고 ) 특별한지정이없는경우 Class 1 을적용한다. 2.8 2.8 5.0 3.5 구분 Classification 바깥지름허용차 OD Tolerance 구분 Classification 의허용차 Thinckness Tloerance OD < 50mm ±0.5mm T < 4mm +0.6mm, -0.5mm Class.1 4mm T < 12mm +15%, -12.5% OD 50mm ±1% T 12mm +15%, -1.5mm OD < 50mm ±0.25mm T < 3mm ±0.3mm Class.2 3mm T < 12mm ±10% OD 50mm ±0.5% T 12mm +10%, -1.2mm 표준치수및중량 Nominal Size & Weight 3.30 2 5.57 5.08 5.77 7.13 5.96 6.78 7.76 9.63 11.9 8.77 9.58 12.2 4.205 5.760 7.100 6.465 7.349 85 7.591 8.636 9.892 12.26 15.17 11.17 12.18 15.52 17.8 23.7 28.5 43.7 49.2 59.5 70.7 79.8 120 146 177 172 187 234 5.90 7.84 9.41 11.5 12.9 15.6 15.9 17.9 23.6 28.8 34.9 30.2 32.7 41.0 2.06 2.03 2.00 2.60 2.59 2.58 3.05 3.04 3.48 3.45 3.42 3.93 3.92 3.89 Remark) If not specified, apply the Class.1 바깥지름 OD 139.8 165.2 190.7 216.3 267.4 Thickness 3.6 5.0 7.0 5.3 7.0 8.2 7.0 8.0 7.0 8.0 중량 Weight (kg/m) 12.1 13.4 15.0 19.8 17.8 19.8 23.6 27.3 20.7 24.2 27.3 31.7 36.9 23.5 31.1 36.1 41.1 38.7 45.0 51.2 57.4 단면적 Area ( cm2 ) 15.40 17.07 19.13 25.22 22.72 25.16 30.01 34.79 26.32 30.87 34.82 40.40 47.01 29.94 39.61 43 55 49.27 57.27 65.19 73.06 단면2차모우먼트단면계수단면2차반지름 Moment of Inertia Section Modulus Radius of Gyration ( cm3 ) ( cm3 ) ( cm ) 357 394 438 566 734 808 952 109x10 114x10 133x10 149x10 171x10 196x10 168x10 219x10 252x10 284x10 421x10 486x10 549x10 611x10 51.1 56.3 62.7 80.9 88.9 97.8 115 132 120 139 156 179 206 155 203 233 263 315 363 411 457 4.82 4.80 4.79 4.74 5.68 5.67 5.63 5.60 6.59 6.56 6.53 6.50 6.46 7.49 7.44 7.40 7.37 9.24 9.21 9.18 9.14 화학성분및기계적성질 Chemical Composition & Mechanical Properties 종류기호 Designation of Grade KS (JIS) 화학성분 (%) Chemical Composition 기계적성질 (5 호시험편 ) Mechanical Properties 편평성 Flat Test 굽힘성 (90 ) Bending Test P S 인장강도 T.S (N/ mm2 ) 연신율 E.L (%) 평판사이의거리 (H) Distance between flat sides SPP(SGP) 0.040 0.040 294 25 ⅔ 6D 호칭지름 Nominal Size 바깥지름 OD 바깥지름의허용차 OD Tolerance Thickness 의허용차 Thickness Tolerance 50A 이하적용 50A and under 수압시험또는비파괴검사 Hydrostatic Test or Nondestructive Test 1) Hydrostatic Test 흑관은 2.5MPa 의수압을가했을때, 이에견디며누수가없어야한다. When a hydrostatic pressure of 2.5MPa is applied, the black pipe shall show no leakage. 2) Nondestructive Test 흑관은초음파탐상검사또는와류탐상검사의어느한가지비파괴검사를하고, KS D 0250(JIS G 0582) 의탐상감도구분 UE 또는 KS D 0251(JIS G 0583) 의탐상감도구분 EZ 의대비시험편의인공홈으로부터의신호와동등이상의신호가없어야한다. A nondestructive test by either an ultrasonic test or an eddy current test shall be made on the black pipe, and there shall be no signal greater than those produced by the artificial defects of the reference test block of division UE of the working sensitivity specified in KS D 0250(JIS G 0582) or division EZ of the working sensitivity specified in KS D 0251(JIS G 0583). 치수, 무게및치수의허용차 Size, Weight & Dimensional Tolerances A B 6 ⅛ 10.5 ±0.5mm 2.0 0.419 8 ¼ 13.8 ±0.5mm 5-12.5% 0.664 10 ⅜ 17.3 ±0.5 mm 5 0.866 15 ½ 21.7 ±0.5 mm 2.65 1.25 20 ¾ 27.2 ±0.5 mm 2.65 0 25 1 3 ±0.5 mm 5 2.45 32 1¼ 42.7 ±0.5 mm 5 3.16 40 1½ 48.6 ±0.5 mm 5 3.63 50 2 60.5 ±1% 3.65 5.12 65 2½ 76.3 ±1% 3.65 6.34 80 3 89.1 ±1% 5 8.49 90 3⅓ 10 ±1% 5 9.74 100 4 114.3 ±1% 12.2 125 5 139.8 ±1% 4.85 16.1 150 6 165.2 ±1% 4.85 19.2 175 7 190.7 ±1% 5.3 24.2 200 8 216.3 ±1% 5.85 30.4 225 9 241.8 ±1% 6.2 3 250 10 267.4 ±1% 6.40 41.2 무게 Weight ( kg /m) 19

Carbon Steel Tubes for 압력배관용탄소강관 C 형강 C - Channel Z 형강 Pressure Service KS D 3562 (JIS G 3454) Z - Channel / Purlin 화학성분및기계성질 Chemical Composition & Mechanical Properties 종류기호 Designation of Grade KS (JIS) SPPS 38 (STPG370) SPPS 42 (STPG410) C Si 화학성분 (%) Chemical Composition Mn P S 0.25 0.35 0.30 ~ 0.90 0.040 0.040 0.30 0.35 0.30 ~ 1.00 0.040 0.040 기계적성질 (5 호시험편 ) Mechanical Properties 인장강도 T.S (N/ mm2 ) 373 (370) 412 (410) 항복강도 Y.P (N/ mm2 ) 216 (215) 245 (245) 연신율 E.L (%) 25 20 C A H 74 mm 200 mm 치수허용차 Dimensional Tolerances 표준치수및중량 Nominal Size & Weight 20 구분 Division 바깥지름의허용차 Tolerance on outside diameter 의허용차 Tolerance on wall thickness 전기저항용접강관 Electric Resistance Welded steel pipe 25A or under ±0.3mm Under 3 mm ±0.3mm 32A or over ±0.8% 3mm or over ±10% 수압시험또는비파괴시험 Hydrostatic Test or Nondestructive Test 1) Hydrostatic Test (unit: kgf/ cm2 {bar}) Schedule number 10 20 30 40 60 80 Hydrostatic Test Pressure 20{20} 35{34} 50{49} 60{59} 90{88} 120{118} A 관에수압을가하여규정압력으로유지시켰을때, 이것에견디며누수의유무를조사한다. When the pipe is subjected to hydrostatic pressure and kept under the specified pressure, its strength to withstand the pressure without leakage shall examined. 2) Nondestructive Test 흑관은초음파탐상검사또는와류탐상검사의어느한가지비파괴검사를하고, KS D 0250(JIS G 0582) 의탐상감도구분 UC 또는 KS D 0251(JIS G 0583) 의탐상감도구분 EW 의대비시험편의인공홈으로부터의신호와동등이상의신호가없어야한다. A nondestructive test by either an ultrasonic test or an eddy current test shall be made on the pipe, and there shall be no signal greater than those produced by the artificial defects of the reference test block of division UC of the working sensitivity specified in KS D 0250(JIS G 0582) or of division EW of the working sensitivity spcified in KS D 0251(JIS G 0583) 표준치수및중량 Nominal Size & Weight 호칭지름 Nominal Size B 바깥지름 OD Thickness 호칭 Nominal Thickness Sch10 Sch20 Sch30 Sch40 Sch60 Sch80 무게무게무게무게무게 Weight Thickness Weight Thickness Weight Thickness ㅁWeight Thickness Weight Thickness (kg/m) (kg/m) (kg/m) (kg/m) (kg/m) 6 ⅛ 10.5 - - - - - - 1.7 0.369 2.2 0.450 2.4 0.479 8 ¼ 13.8 - - - - - - 2.2 0.629 2.4 0.675 3.0 0.799 10 ⅜ 17.3 - - - - - - 0.851 2.8 1.00 1.11 15 ½ 21.7 - - - - - - 2.8 1.31 1.46 3.7 4 20 ¾ 27.2 - - - - - - 2.9 1.74 3.4 2.00 3.9 2.24 25 1 3 - - - - - - 3.4 2.57 3.9 2.89 7 32 1 ¼ 42.7 - - - - - - 3.6 3.47 4.24 4.9 7 40 1 ½ 48.6 - - - - - - 3.7 4.10 4.89 5.1 5.47 50 2 60.5 - - 2 - - 3.9 5.44 4.9 6.72 5.5 7.46 65 2 ½ 76.3 - - 7.97 - - 5.2 9.12 10.4 7.0 12.0 80 3 89.1 - - 9.39 - - 5.5 11.3 6.6 13.4 7.6 15.3 90 3 ½ 10 - - 10.8 - - 5.7 13.5 7.0 16.3 8.1 18.7 100 4 114.3 - - 4.9 1 - - 1 7.1 18.8 8.6 22.4 125 5 139.8 - - 5.1 16.9 - - 6.6 21.7 8.1 26.3 9.5 30.5 150 6 165.2 - - 5.5 21.7 - - 7.1 27.7 9.3 35.8 11.0 41.8 200 8 216.3 - - 6.4 33.1 7.0 36.1 8.2 42.1 10.3 5 12.7 63.8 250 10 267.4 - - 6.4 41.2 7.8 49.9 9.3 59.2 12.7 79.8 15.1 93.9 무게 Weight (kg/m) 호칭명 Designation 파형강관 치수 Size 단면적 Square Measure ( cm2 ) 단위무게 Square Weight (kg/m) H A C t 4031 4032 4033 60 30 10 2.0 2.072 2.537 2.872 3 1.99 2.25 4071 70 40 25 3.032 8 4113 75 35 15 3.677 2.89 4141 4142 4143 75 45 15 2.0 2.952 3.637 4.137 2 2.68 5 4221 4222 4223 4224 4225 4226 4227 4363 4365 4366 4367 4403 4405 4407 100 50 20 100 50 20 125 50 20 150 50 20 2.0 2.8 생산규격 Production Standard 3.672 37 5.172 6.205 7.007 8.548 9.469 5.747 7.807 9.548 10.59 6.322 8.607 11.72 2.88 3.56 6 4.87 5.50 6.71 7.43 1 6.13 7.50 8.32 4.96 6.76 9.20 치수 Size Thickness 원자재 Raw Material 도금부착량 Zinc Coating Mass Corrugated Steel Pipes and Sections 200 mm 74 mm 1.4 ~ mm ASTM A653 Gr.230 ~ 340 (Gr.33 ~ 50) JIS G 3302 (KS D 3506) SGH340 ~ 490 Z08(80g/ m2 ) ~ Z60(600g/ m2 ) ( 양면 Both Surfaces) KS D 3590 기호 Symbols 관경 Outer Diameter Thickness 길이 Lenagth(m) SCP 1RS 300 ~ 2,400 ~ 2.7 1 ~ 12 SCP 3RS 900 ~ 2,400 2.0 ~ 1 ~ 12 21

비닐하우스용 도금강관 Carbon Steel Pipes for Plastic Housing 기술개발 및 인증 [ Technical & Development and Certification ] 동아스틸주식회사는 제품의 생산과 관리에 있어 보다 엄격한 체제를 갖추고 있으며, 동아스틸주식회사만의 독특한 품질보증체계를 통해 생산품의 양과 질에서 국내뿐 아니라 국제적으로도 인정을 받고 있습니다. 종류의 기호 Designation of Grade 또한 전자시스템(바코드 시스템) 구축으로 재고주문 물류를 One stop system으로 운영하고 있습니다. SPVH 아연도 강관 일반농업용 SPVH-AZ 55% 알루미늄-아연합금 도금 강관 DOSCO operates a precise production management and control system. Our unique quality control system ensures high-end production for local and international markets. In addition, our electronic Bar-Coding controls the inventory as One-stop system. 항복 강도 (N/ ) 인장 강도 (N/ ) 연신율 (%) SPVH 205 이상 270 이상 20 이상 SPVH-AZ 295 이상 400 이상 18 이상 제품 품질 Product Quality 22 기호 시험방법 도금 부착량 (g/ ) 평균 도금 SPVH 관으로 시험할 때 150 이상 6 이상 관으로 시험할 때 80 이상 안쪽 반지름 90 DX6 6 이상 염수분무 시험기 만능 재료 시험기 금속 현미경 Salt Water Spray Testera Universal Test Machine Metallograph 품질보증 [ Quality Assurance ] 당사는 ISO 9001 품질인증시스템과 KS제품인증을 획득했으며, 특히 슈퍼칼라각관은 기존 칼라각관의 내면부식을 획기적으로 개선하여, 기술력을 인정받아 국내에서 특허등록을 - 관은 KS D 0201의 염화안티몬법(간접법)에 의한 방법으로 검사한다. - 아연도강관의 아연도금 양면 부착량은 300g/ 이상이어야 하고 용융 55% 알루미늄-아연합금 도금 강관의 양면 도금 부착량은 160g/ 이상이어야 한다 완료하였으며, 제품 또한 국내뿐만 아니라 국제적으로 인정받고 있습니다. 앞으로도 더 많은 기술개발을 통해 연구하는 기업으로 여러분에게 다가갈 것입니다. Dosco is Obtained for ISO 9001 Certification and KS Certification(Korean industrial Standard). - 평균 도금 측정은 용사부 도금층 중앙에서 실시한다. Our Technical Support Team has successfully improved internal corrosion on - 굽힘 시험을 하였을 때, 균열이 생기거나 이음매의 떨어짐 또는 도금층이 떨어지거나 균열이 생겨서는 안 된다. the regular color pipes and has obtained a patent-registration for this. - 용사면에는 용제를 도포하여 부식을 방지하여야 한다. This Super Color pipe has won recognition from local markets through out the world. We will work with you to be a leader in research and development. 치수, 무게 및 치수의 허용차 Size, Weight & Dimensional Tolerances 호칭명 바깥지름 ( ) 치수허용차 (바깥지름) 1.2 허용차 : 0.0~+0.13 1.4 1.5 23 1.7 허용차 : 0.0~+0.17 2.0 15 15.9 0.435 0.501 0.533 0.564 다양한 제품과 우수한 성능, 최고의 품질로 세계를 향한 도전은 참다운 기업정신을 구현하는 19 19.1 0.530 0.611 0.651 0.690 동아스틸주식회사의 약속입니다. 22 22.2 0.621 0.718 0.766 0.813 25 15.4 0.716 0.829 0.884 0.939 0.994 29 28.6 0.811 0.939 1.000 1.070 1.130 32 31.8 0.906 1.050 1.120 1.190 1.260 38 38.1 1.090 0.270 1.350 1.440 1.530 1.780 50 50.8 1.470 1.710 1.820 1.940 2.060 2.410 고객의 신뢰와 끊임 없는 기술개발과 연구정신은 미래를 향한 도전정신과 함께 최첨단 기술산업을 만들어가는 동아스틸주식회사의 미래의 약속입니다. Changing the future with a wide range of products, outstanding performance, and the best quality is a promise of Dosco, which seeks to be the best enterprise of the 21st century. Dosco promises customer satisfaction, endless technological development and research to lead the industry along with challenge-oriented sprit. w w w. d o s c o. c o m w w w. d o s c o. c o m SPVH-AZ 굽힘 각도 ( ) 화학 성분 분석기 Chemical Composition Tester D O N G - A S T E E L C O., LT D. D O N G - A S T E E L C O., LT D. 기계적 성질 Mechanical Characteristics