MY129630A - A steel plate and a hot-dip galvanized steel plate having superior electric and magnetic shielding property - Google Patents

Abstract

DISCLOSED ARE A STEEL PLATE AND A HOT-DIP GALVANIZED STEEL PLATE, SUPERIOR IN TERMS OF HIGH ELECTROMAGNETIC SHIELD CAPACITY.THE STEEL PLATE IS PREPARED FROM A COMPOSITION COMPRISING C, N AND S IN AN AMOUNT OF 0.0150 % BY WEIGHT OR LESS IN TOTAL; MN IN AN AMOUNT OF 0.1 TO 1.0 % BY WEIGHT; SI IN AN AMOUNT OF 0.5 % BY WEIGHT OR LESS; AL IN AN AMOUNT OF 1.0 % BY WEIGHT OR LESS; P IN AN AMOUNT OF 0.06 % BY WEIGHT OR LESS; AND FE FOR THE REMAINDER, AND INEVITABLE ELEMENTS, AND SHOWS A YIELD STRENGTH OF 18 KG/MM2 OR HIGHER, AND AN ELONGATION OF 40 % OR HIGHER.THE HOT-DIP GALVANIZED STEEL PLATE IS PREPARED FROM A COMPOSITION COMPRISING C, N AND S IN AN AMOUNT OF 0.0150 % BY WEIGHT OR LESS IN TOTAL; MN IN AN AMOUNT OF 0.2 TO 0.8 % BY WEIGHT; A1 IN AN AMOUNT OF 0.6 % BY WEIGHT OR LESS; SI IN AN AMOUNT OF 0.4 % BY WEIGHT OR LESS; P IN AN AMOUNT OF 0.06 % BY WEIGHT OR LESS, WITH THE PROVISO THAT THE SUM OF MN, A1, SI AND P AMOUNTS TO 0.2~1.0 % BY WEIGHT; AND FE FOR THE REMAINDER, AND INEVITABLY PRESENT ELEMENTS. IN ADDITION TO HAVING HIGH YIELD STRENGTH, THE HOTDIP GALVANIZED STEEL PLATE IS RESISTANT TO CORROSION OWING TO THE COATING OF A CORROSION-RESISTANT ELEMENT ON THE SURFACE.