近几年来，包括我国在内的全球主要国家对钢材需用量同其国民经济产值有明显对应关系，钢材重新被确认为材料支柱。原因是经过高技术改造，钢铁工业发生了根本变化，推出了很多性能优越的“高技术钢材”，促进了相关工业的发展。微合金钢就是这些“高技术钢材”中用量最大的一种。在过去十年，我国针对大型露天矿重型设备、高压输送管线和制造运输集装箱需要发展微合金钢的经验表明，它是在高技术条件下生产的高经济效益钢材。展望21世纪，微合金钢由于有利于环境保护又有技术发展深度，在我国高压输气管线、造船和建筑钢结构方面还会有进一步发展。应列为创新项目，重点扶植、注意跟踪、及时开发，以带动钢铁工业技术改造。

In recent years, the GNP (General Gross National Production) of the major countries in the world shows apparent relation with their consumption of steel and the steel is reconfirmed as the backbone of the engineering materials. This is due to the fact that the steel making industry has been reformed perfectly by the high technique — Advanced Process Control System and brought out new steels with superior property as “high tech” steels. Micro-alloyed steel is one of the major high tech steels with largest market demand. Micro-alloyed steels are produced by the Advanced Metallurgical Manufacturing Process with addition of strong carbide and nitride alloying elements, i. e. , Nb, Ti, and V to refine their grain size in re-heating and to harden and toughen their matrix after rolling. There were developed the micro-alloyed steel of HW60R for the manufacture of large dumping trucks in open-mining, the line pipe steels of X52 ～ X65 for the construction of high pressure pipeline, and the micro-alloyed weathersteel for transportation container manufacture with great economic successes in China. In view of the micro-alloyed steels being environment conscious materials and the further development of high tough line-pipe steels, high strength ship steels and high tough SUF steel plate, the micro-alloyed steels are prospective in China in the 21 century.