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|General ship class (A, B, D, E)||KR, NK, ABS, GL, LR|
|High tensile strength ship class steel (AH, DH, EH32/36/40 FH32/36)||DNV, RINA, CR, BV, CCS|
It is a steel plate most widely used in general welded structures, bridges, industrial machine, construction and maritime structures, etc. with the strength levels in a wide range of 30~100kgf/mm2. In general, high tensile strength higher than 60kgf/mm2 are manufactured through Q.T method. In structures vulnerable to occurrence of Lamellar Tear, Lamellar Tear-resistant steel (referred to as Z-Plate) for which the thickness direction toughness has been improved through reduction in sulfur and formation control of included materials. In the case of maritime structures under cryonic environment, outstanding low-temperature toughness is required.
|KS||SS400, 490, 540, SM400, 490A, B, C SM490YA,YB SM520B, C, SM570|
|JIS||SS400, SS490, SS540, SM400A, B, C, SM490A, B, C SM490YA, YB SM520B, C, SM570|
|ASTM||A36, A573 Gr58, 65, 70, A572 Gr42, 50, 60, 65, A529|
|BS||4360 Gr50A, B, C, D, AA, EE Gr55C, E, F|
|API||API 2H Gr42, Gr50, API 2w Gr50|
With the advancement of the energy industry, the areas of application of this product are being expanded rapidly. It is used mostly in the areas of Gas Holder (Ball Tank), LPG Tank, storage tank for crude oil and various liquefied substances, purification of crude oil and boiler for thermal power generation, etc. It is categorized into high, room and low-temperature applications depending on the scale and complexity of facilities, and harshness of the environment of use. For steel plates used in mid to high temperatures in the range of 300~500˚C, Cr and Mo are added to improve the high-temperature Creep strength and anti-oxidation resistance. On the other hand, steel plate for low-temperature applications in the range of -30˚C~-196˚C including storage of liquefied gas, etc., Ni is added in most cases to improve low-temperature toughness. Guarantee for internal quality is very important since it is used under highly pressurized environment.
|KS||SB410, 450, 450M, 480, 480M|
|JIS||SGV410, 450, 480, SPV235, 315, 355, 450, 490 SLA235A, 235B, 325A, 325B, 360, SL9N590|
|ASTM||A285 GrA, B, C A387, Gr11,Gr12,Gr22 A515 Gr55, 60, 65, 70 A516 Gr55, 60, 65, 70, A537, Class I, II A553 Class I,II|
High tensile strength is required to cope with large diameter and carnification of line pipes for mass transportation of crude oil or natural gas. Moreover, there is a trend of concurrent requirement of cryogenic toughness due to cold environment of application due to depletion of resources in areas of more moderate environment. This specification is characterized by importance in the width direction strength due to stress from the internal pressure of pipe acting onto the width direction of the pipe. In particular, guarantee for HIC (Hydrogen Induced Cracking) resistance is required for steel pipes used in transportation of Sour Gas with high contents of H2S
|API||5L A, B X42, X46, X52, X56, X60 X65, X70 ,X80|
Weather-resistance and corrosion-resistance have been improved by adding chemical elements such as Cr, Cu and Ni, etc. to structural steel plate. it is categorized into those used for plated application and non-plated application in accordance with the use by the clients.
|JIS||SMA400A, B, C, SMA490A, B, C, SMA570|
|ASTM||A242, A588A, B, C, D, E, F|