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1 ENGLISHF utureContentsManufacturing Process4 Characteristics and Usages6 Ordering35 Available Size36 Size Tolerances37CR Surface Finishing42 Packaging & Labeling43 Handling45 POSCOs stainless steel products are manufactured by the latestfacilities and steel , called the flower of steels, contains more than 12%of chromium and tends to be rustproof. Therefore, it is used asinterior and exterior materials for building, kitchenwares, industrialparts, automotive components, medical instruments and so has established integrated manufacturing system frommelting shop to hot & cold rolling process. POSCO produces 200million tons of stainless steel products annually. POSCO also pursues complete quality control and deliverymanagement, and strives to achieve customer STEELMANUFACTURING PROCESSSTAINLESS STEEL4 ScrapNickelChromiumAlloys Electro ArcFurnaceElectro ArcFurnaceAODAODVODC ontinuousCasting ContinuousCasting SlabReheatingFurnaceHot RollingBlack CoilZRMCRMTCMC ontinuous AnnealingContinuous Cold Annealing& Pickling LineBright AnnealingLine5 Cold Rolled SkelpCold Rolled CoilCoil GrindingLineHot Annealing &Pickling LineCoil PreparationLineBAFHot Rolled CoilPickling LineSkin Pass Mill TensionLevelling Line Coil polishingLineSlitting LineShearing Line Cold Rolled SheetCHARACTERISTICS AND USAGES301 17Cr-7Ni301L17Cr-7Ni-LCAUSTENITEDUAL-PHA SEFERRITEMARTENSITESTAINLESS STEEL6 Characteristics301 and 301L contain lower Cr and Ni content than 304 steel does.

2 Cold working increases strength and generatesmagnetism. Compared to Aluminium, they are excellent in corrosion resistance, strength at high temperature, and fatiguestrength. They are applicable for railway vehicles due to their economical efficiency, safety and light available Hot rolled coil, Cold rolled coil Applications Train interior and exterior panels Structural materials of train Components of electronic products SpringChemical compositions and physical propertiesDesignationsChemical compositions (%)Mechanical propertiesPhysical propertiesThermalThermalJISY ieldTensileElongationHardnessSpecificSpe cificExpansionConductivityPoscoCCrNiMoOt hers Strength StrengthHeatCoefficientW/m(KS)(N/mm2)(N/ mm2)(%)(Hv)J/g CGravityW/m(20-100 C)(100 C)Foot Step & Rain GutterSTS301 LSide Upper PanelSTS301 LSide Window panelSTS301 LStiffennerSTS301 LSide Loner PanelSTS301 LEnd FrameSTS301 LEnd PanelSTS301 LSide Entrance FrameSTS301 LKeystone PlateSTS301 LCross BeamSTS301 LRooker RailSTS301 LDoor HeaderSTS301 LCar LineSTS301 LRoof PanelSTS301L304 : Most widely used steel type because of its good corrosion resistance, thermal resistance, strength at low-temperatureand mechanical properties.

3 304L : Low-carbon 304 stainless steel . It is excellent in intergranular corrosion resistance. 304LN : 304 stainless steel with low nitrogen. Superior tensile strergth and corrosion resistance to available 304,304L : Hot rolled coil, Cold rolled coil, Plate 304LN: Plate Applications304: Household utensils (sink, interior pipe, hot-water system, bathtub, boiler and others), Automotive components (wiper, muffler,molding), medical instruments, building materials, some industries (chemical, food processing, textile) and vessel : Machinery and tools used in chemical, coal, and petroleum industries that require high inter-granular corrosionresistance, Building materials, heat resistant parts and parts that is difficult to implement heat treatment, LNG : Water tank of heater, Chemical compositions and physical propertiesDesignationsChemical compositions (%)Mechanical propertiesPhysical properties7 CHARACTERISTICS AND USAGEST hermalThermalJISY ieldTensileElongationHardnessSpecificSpe cificExpansionConductivityPoscoCCrNiMoOt hers Strength StrengthHeatCoefficientW/m(KS)(N/mm2)(N/ mm2)(%)(Hv)J/g CGravityW/m(20-100 C)(100 C) stainless and Mn contents are lowered and N is added in 304 steel to protect from reducing ductility to prevent ductility reductionand to increase strength, which enables available Cold rolled coil, Plate Applications Structural material Street light Potable water pipeChemical compositions and physical propertiesCHARACTERISTICS AND USAGESD esignationsChemical compositions (%)

4 Mechanical propertiesPhysical propertiesThermalThermalJISY ieldTensileElongationHardnessSpecificSpe cificExpansionConductivityPoscoCCrNiMoOt hersStrength StrengthHeatCoefficientW/m(KS)(N/mm2)(N/ mm2)(%)(Hv)J/g CGravityW/m(20-100 C)(100 C)304J117Cr-8Ni-2 CuAUSTENITEDUAL-PHASEFERRITEMARTENSITEC haracteristicsWith an addition of Cu, 304J1 has excellent antibiosis, formability, and deep drawability, also used for products requiringsanitary available Hot rolled coil, Cold rolled coilApplications Thermos bottle Thermos lunch box Kitchen pot Catering facilities Products requiring spinning drawingChemical compositions and physical propertiesA Section of Thermos9 Components of Burner (Presenting the process of forming)CHARACTERISTICS AND USAGESD esignationsChemical compositions (%)Mechanical propertiesPhysical propertiesThermalThermalJISY ieldTensileElongationHardnessSpecificSpe cificExpansionConductivityPoscoCCrNiMoOt hers Strength StrengthHeatCoefficientW/m(KS)(N/mm2)(N/ mm2)(%)(Hv)J/g CGravityW/m(20-100 C)(100 C)305EG16Cr-14 NiAUSTENITEDUAL-PHASEFERRITEMARTENSITEST AINLESS STEEL10 CharacteristicsSuitable for electronic components because of its non-magnetism and excellence in formability and available Hot rolled coil, Cold rolled coilApplications Electrodes components of TV monitor (electron gun) VTR guide roller Components of motor Chemical compositions and physical propertiesElectron GunCHARACTERISTICS AND USAGESD esignationsChemical compositions (%)

5 Mechanical propertiesPhysical propertiesThermalThermalJISY ieldTensileElongationHardnessSpecificSpe cificExpansionConductivityPoscoCCrNiMoOt hers Strength StrengthHeatCoefficientW/m(KS)(N/mm2)(N/ mm2)(%)(Hv)J/g CGravityW/m(20-100 C)(100 C)309S22Cr-13Ni310S25Cr-20 NiAUSTENITEDUAL-PHASEFERRITEMARTENSITEC haracteristicsHighly alloied stainless steel . It has high strength and corrosion resistance in high Exhaust Manifold Heat exchanger Incinerator Furnace Contact components with high temperatureChemical compositions and physical properties11 Products available Hot rolled coil, Cold rolled coil, Plate CHARACTERISTICS AND USAGESD esignationsChemical compositions (%)Mechanical propertiesPhysical propertiesThermalThermalJISY ieldTensileElongationHardnessSpecificSpe cificExpansionConductivityPoscoCCrNiMoOt hers Strength StrengthHeatCoefficientW/m(KS)(N/mm2)(N/ mm2)(%)(Hv)J/g CGravityW/m(20-100 C)(100 C)IncineratorExhaust ManifoldFurnace31618Cr-12Ni-2Mo316L18Cr- 12Ni-2Mo-LCAUSTENITEDUAL-PHASEFERRITEMAR TENSITESTAINLESS STEEL12 Characteristics316 : With the addition of Mo in 304, 316 steel is superior in corrosion resistance, pitting resistance and high temperaturestrength.

6 316L : Low carbon 316 steel type. It has all the properties of 316 steel and has excellent inter-granular corrosion compositions and physical propertiesFood Processing FacilityWater PipeHeat ExchangerChemical PlantFlexible PipeHeat ExchangerProducts available Hot rolled coil, Cold rolled coil, PlateApplications316 Potable water pipe Equipment for manufacturing chemicals, paper, dye, acetic and fertilizer Structures in thecoastal area Photo industries, and food processing industries316L Suitable for the corrosion-susceptible environments such as salt and toxic gas which one of the 316 steel usagesCHARACTERISTICS AND USAGESD esignationsChemical compositions (%)Mechanical propertiesPhysical propertiesThermalThermalJISY ieldTensileElongationHardnessSpecificSpe cificExpansionConductivityPoscoCCrNiMoOt hersStrength StrengthHeatCoefficientW/m(KS)(N/mm2)(N/ mm2)(%)(Hv)

7 J/g CGravityW/m(20-100 C)(100 C) for Petrochemical ProductsChemical PlantHeat Exchanger13 Characteristics316LN : ~ of N is added to 316 to increase : Ti is added to 316 to increase inter-granular corrosion : 317L stainless steel has more Mo than 316L does. It has good seawater and SCC available 316LN, 317L : Plate 316 Ti: Hot rolled coil, Cold rolled coil, PlateApplications316LN Chemical tank Chemical vessel Chemical plant Nuclear reactor316Ti Crude oil tank Heat exchanger cover317L Chemical vessel Chemical reactor Petrochemical tank and vessel Chemical compositions and physical propertiesCHARACTERISTICS AND USAGESD esignationsChemical compositions (%)Mechanical propertiesPhysical propertiesThermalThermalJISY ieldTensileElongationHardnessSpecificSpe cificExpansionConductivityPoscoCCrNiMoOt hersStrength StrengthHeatCoefficientW/m(KS)(N/mm2)(N/ mm2)(%)(Hv)J/g CGravityW/m(20-100 C)(100 C)321 STEEL14 CharacteristicsTi is added to 304 steel to prevent inter-granular corrosion.

8 Applicable to usages at temperature between 430 and 900 Applications Exhaust pipe of aircraft Boiler cover Heat exchanger Boiler pipe Some parts that are impossible for heat treatment after welding or assemblingChemical compositions and physical propertiesProducts available Hot rolled coil, Cold rolled coil, Plate CHARACTERISTICS AND USAGESD esignationsChemical compositions (%)Mechanical propertiesPhysical propertiesThermalThermalJISY ieldTensileElongationHardnessSpecificSpe cificExpansionConductivityPoscoCCrNiMoOt hersStrength StrengthHeatCoefficientW/m(KS)(N/mm2)(N/ mm2)(%)(Hv)J/g CGravityW/m(20-100 C)(100 C) is added to 304 steel to increase inter-granular corrosion resistance. Products available Hot rolled coil, Plate rollApplicationsWelding structure or some parts used at temperature between 400 and 900 C : Pipe, flange, tube, turbine components forhigh temperature and high compressed compositions and physical properties15 Model of Gas Turbine Gas TurbineCHARACTERISTICS AND USAGESD esignationsChemical compositions (%)Mechanical propertiesPhysical propertiesThermalThermalJISY ieldTensileElongationHardnessSpecificSpe cificExpansionConductivityPoscoCCrNiMoOt hersStrength StrengthHeatCoefficientW/m(KS)(N/mm2)(N/ mm2)(%)(Hv)J/g CGravityW/m(20-100 C)(100 C) STEEL16 CharacteristicsExcellent oxidation resistance and salt induced hot corrosion resistance by adding available Hot rolled coil, Cold rolled coilApplications Flexible coupling Heater Incinerator componentsChemical compositions and physical propertiesBellows ConstructionStainless SteelTwin Ply (XM15J1)

9 End CapsExternal BraidStainless SteelEnd Cap ExtensionsOptional-StandardExtension is Two InchesInternal LinerStainless steel BraidingOr Stripwound Liner (XM15J1)is OptionalCHARACTERISTICS AND USAGESD esignationsChemical compositions (%)Mechanical propertiesPhysical propertiesThermalThermalJISY ieldTensileElongationHardnessSpecificSpe cificExpansionConductivityPoscoCCrNiMoOt hersStrength StrengthHeatCoefficientW/m(KS)(N/mm2) (N/mm2)(%)(Hv)J/g CGravityW/m(20-100 C)(100 C) content of Cr, Mo and N gives an excellent chlorine induced corrosion resistance, SCC and erosion corrosion. It is controlled to contain 50% of Austenite and Ferrite, available Hot rolled coil, Cold rolled coil, PlateApplications Tube and pipe for gas petroleum products Desalination facilities, water reservoir and water cleaning facilities Pressure vessels, tank, pipe and heater exchanger to produce or transport chemical products Pressure vessels, tank, pipe for containing salty liquid and food industry Duct of desulfurization facilities Chemical compositions and physical propertiesWater PipeWater ReservoirWater TankDesalination Plant (Resource.)

10 Doo San heavy industries)17 CHARACTERISTICS AND USAGESD esignationsChemical compositions (%)Mechanical propertiesPhysical propertiesThermalThermalJISY ieldTensileElongationHardnessSpecificSpe cificExpansionConductivityPoscoCCrNiMoOt hersStrength StrengthHeatCoefficientW/m(KS)(N/mm2) (N/mm2)(%)(Hv)J/g CGravityW/m(20-100 C)(100 C) STEEL18 Chemical compositions and physical propertiesCharacteristicsThe contents of Ni and Mo saving duplex stainless steel (Lean Duplex)Excellent pitting corrosion, crevice corrosion , intergranular corrosion, and stress corrosion cracking (SCC) resistanceProducts available Hot rolled coil, Cold rolled coil, PlateApplicationsWater pipe, Seawater facilities, Chemical facilities, Equipment for manufacturing paper, dye and fertilizer,Photo industry, Food processing industry, Structure in the costal area, Nuclear fuel reprocessing facilitiesCHARACTERISTICS AND USAGESD esignationsChemical compositions (%)Mechanical propertiesPhysical propertiesThermalThermalJISS pecificSpecificExpansionConductivityPosc oCCrNiMoOthersYSTSEIHVHeatCoefficientW/m (KS)J/g CGravityW/m(20-100 C)(100 C)Water PipeWater ReservoirChemical PlantDesalination Plant (Resource : Doo San heavy industries)AUSTENITEDUAL-PHASEFERRITEMAR TENSITEC hemical compositions and physical weldability and formability by adding available Hot rolled coil, Cold