Hot-Rolled Steel for General Structures General structural steel and welding structural steel are used in the construction of steel structures, bridges, ships and automobiles. JIS : SS330, SS400, SS490, SS540, SM400A, B, C, SM490A, B, C, SM400YA, YB, SM520B, C, SM570 - ASTM : A36, A283, A570 - BS : BS1449 PART1 50/35HR, HS, BS4360 43A, B, C, 50B, C - DIN: DIN17100 ST22, ST33, ST37-2, ST52-3, RST37-2 Hot-Rolled Steel for Gas Cylinders This steel, which have high strength and good formability, is used in high-pressure gas container with less than a 500l inner capacity containing LPG, acetylene and other high-pressure gases. JIS : SG255, 295, 325, 365 ASTM : A455 Steel for cold-rolled steel This steel is used to manufacture cold rolled steel, galvanized steel and electro galvanized and color steel sheet. SAE : SAE1006-1055 Atmospheric Corrosion Resistant Steel This type of steel enhances in both corrosion and atmospheric corrosion resistant properties, adding such special elements as P, Cu, and C, and is used in the manufacturing of containers, special automobiles and construction structures. POSCO : PAWS50 JIS : SPA-H Steel for Casting and Tubing of Oilwell Pipes This type of steel is characterized by a strict quality of high strength, extremely low temperature toughness, excellent weldability and fracture resistance, and is used in drilling and producing in severely cold areas, or for deep sea oilwells. API : 5G-J55, K55, N80, P110 Hot-Rolled Steel for Hull Structures This steel has received approval for its manufacturing process from overseas classification societies. A, B, and D grade products are used in shipbuilding and are excellent in weldability and shock resistance. Classification Society Standards : KR-RA, RB, AB-A, LR-A, B, NK-KA, NV-A Hot-Rolled Steel for Automobile Structural Uses This high-strength steel has a good weldability and is used in automobile frames, members, and wheel disks. POSCO : ATOS55, 60, 80 AUTOBEAM, STAB JIS : SAPH310, 370, 400, 440, SPFH540, 590 ASTM : A715-40, 45, 50, 55, 60, 65, 70, 80