38CrMoAl round has high surface hardness, wear resistance and fatigue strength, and has good heat resistance and corrosion resistance, hardenability is not high. For the production of high wear resistance, high fatigue strength and a relatively high-intensity, high dimensional precision after treatment nitride parts, such as imitation of the mold, cylinder sets, gears, high pressure valves, boring bars, worm, etc. grinder spindle. But larger size parts should not be used.