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Products / Technology

Products of POSCO

Steel Plate

TMCP is the process of rolling and accelerated cooling (PILAC) to produce high tensile steel without heat treatment, which means by adding small amount of alloy, high strength and superior tenacity are obtained and reduction of carbon equivalents (CEQ) provides better performance in use of welding by the customers.

Types and Uses
Steel for Ships

Classification general steel, high tension steel and TMCP-type high-tension steel, with which heat input high-efficiency welding is possible, have all obtained manufacturing approval from overseas classification societies. This steel is widely used in shipbuilding.

  • Classification Societies : KR, NK, ABS, GL, LR, NV, RINA, CR, BV
  • NK : KA, KB, KD, KE, KA32, KD32, KA36, KD36, KA40, KD40, KE40, KL24A, BKL33/37
  • ABS : A, B, C, D, AH32, DH32, EH32, AH40, DH40, EH40, V-60
  • NV : A, B, C, D, A27, D27, E27, A32, D32, E32, A36, D36,E36, A40, D40, E40
  • CR : A, B, C, D, A32, D32, E32, A36, D36, E36, A40, D40, E40
  • BV : A, B, C, D, A32, D32, E32, A36, D36, E36, A40, D40, E40
  • RINA : A, B, C, D, A27, D27, E27, A32, D32, E32, A36, D36, E36, A40, D40, E40
  • LR : AH32, DH32, EH32, AHS34, DHS34, AH36, DH36, EH36,AH40, DH40, EH40, LT60-360, 410
  • GL : A32, D32, E32, A36, D36, E36, A40, D40, E40, 490T, 500T
Steel for Automobile Structural Uses

Steel excellent in bending and deep drawing is used in automobile structures.

  • JIS : SAPH400
Steel for General Structures

The Steel for general welding structures, bridges, industrial structures has high weldability and is widely used in machines and construction materials. High tension steel the 60kg class is produced after heat treatment process of quenching & tempering.

  • KS : SS330/400/490/540, SM400/490/520/570, SN400/490, HSB500/600
  • JIS : SS330/400/490, SM400A/B/C, SM490A/B/C, AM490YA/YB, SM520B/C, SM570
  • ASTM : A283 GrA/B/C/D, A36, A283 GrA/B/C/D, A572 Gr42/50/60/65, A633 GrE, A514F, A573 Gr70
  • DIN : ST37-2/3, ST52-3, RST37-2, ST44-2/3
  • BS : 4360 Gr40B Gr43A/B/C/D/E, EEGr50A/B/C/D
  • EN10025 : S355J2, S355K2
Atmospheric Corrosion Resistant Steel

Such atmospheric corrosion resistant elements as Cu, Cr, and Ni are added to structural steel to increase both weather and corrosion resistance. This type of steel is classified into coated and non-coated steels.

  • JIS : SMA400/490/570
  • ASTM : A588 GrA/B/C
Steel for Machine Structural Uses

Steel excellent in machinability and abrasion resistance is used in the production of mechanical parts.

  • JIS : S10C-S55C, SCM440, AISI1020-1055
  • ASTM : SAE1010-1049
Medium-to-High & Intermediate Temperature Steel

Steel excellent in workability and weldability, and both heat and corrosion resistant, is used for gas ball tanks, LPG tanks, petroleum and liquefied materials storage tanks, and fire power generation boilers.

  • JIS : SB410/450/480, SGV410, SPV235/315/450/490, SB450M/480M
  • ASTM : A285 GrA/B/C, A515 Gr55/60/65/70, A537 CLASS1/2, A387 Gr11/12/22, A302 GrC, A553-1
Steel for Transporting Petroleum

This steel is used in line pipes that transport petroleum or natural gas in large quantities. Steel proven with extremely low-temperature toughness, hydrogen-induced crack(HIC) resistance and stress-corrosion crack(SSC) resistance is produced in order to cope with the worsening environmental situation stemming from exhaustion of our natural resources.

  • API : API 5L- B, X42, X46, X52, X56, X60, X65, X70, X80, X90, X100, X120
Steel for Marine Structural Uses

Steel with lamellar tear resistance is used in oil drilling ships and crude oil production platforms. This type of steel has improved ductility in thickness direction as well as lowtemperature toughness.

  • API : API 2H Gr42, 50, API 2W Gr50T, API 2W Gr60
  • EN10225 : S355G9+M, S355G10+M
Steel for Low Temperature Pressure Vessels

Ni is added to this type of steel, giving it excellent lowtemperature toughness and corrosion resistance. This type of steel is used in LNG tanks and liquefied gas storage tanks.

  • JIS : SLA325B/360
  • ASTM : A203 GrD/E