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通过爆炸加载试验观察分析其金相组织，研究低碳钢和硅锰钢材料的裂纹生成、扩展和断裂机制．为榴弹威力设计、破片控制提供依据．研究表明，低碳钢壳体断裂机理属剪切断裂，而硅锰钢壳体断裂机理则是以径向断裂为主，但伴有内表面的剪切断裂．硅锰钢破碎性均匀，属于高破片率钢，适合作榴弹弹体材料．
The microstructure of the steel was analyzed by explosive loading test to study the mechanism of crack formation, propagation and fracture in mild steel and silicon-manganese steel. For the grenade power design, fragment control provide the basis. The research shows that the fracture mechanism of low-carbon steel shell is shear fracture, while the fracture mechanism of silicon-manganese steel shell is mainly radial fracture, but with the shear fracture of the inner surface. Silicon manganese steel crushing uniform, belonging to the high fragmentation rate steel, suitable for grenade material.