Steel substrate for glassing

摘要

A low carbon glassing steel structure having a very fine grain structure used in glass coating applications without deterioration in strength and impact resistance after being subjected to multiple high temperature thermal cycles, the steel structure having a minimum Charpy V-Notch energy of 50 ft-lbs at -50 DEG F. in both the longitudinal and transverse directions and a minimum tensile strength of 60 KSI, an ASTM ferrite grain size of eight or finer, and the following composition: ELEMENT PERCENTAGE BY WEIGHT Carbon up to 0.10 percent Manganese 0.45-1.25 percent Silicon 0.20-0.65 percent Niobium 0.02-0.06 percent Iron and incidental Balance Impurities