叙述了以细化钢铁结构材料的晶粒尺寸为核心，将现有钢材强度和寿命翻番的基本进展；在保持塑性提高和价格下降的同时，碳素结构钢板带材屈服强度从235 MPa已提高到420～470 MPa，塑性由最大26%提高到29%～34%；建筑螺纹钢由一级提高到三级，碳—锰钢由二级提高到四级，且抗地震性能好；高强抗延迟断裂螺栓钢，已达到世界最高的13.9级。

Advance on “Ultra Steel”，which is characterized by fine grained microstructure，is described in this paper. Progress has been made in this field in China. Yielding strength increases from 235 Mpa to 420〜 470 Mpa while elongation increases from 26% to 29% 〜34% for plain carbon steels. The high strength steel with anti-delayed fracture function has been developed and its pilot testing has been successfully finished in IVECO Auto Com. with 13.9 grade.