Inconel718 is containing niobium and molybdenum , which has good comprehensive performance in 253 ~ 700 ℃ temperature range,and the yield strength is in the first place of high temperature alloy below 650℃, and has good fatigue resistance, radiation resistance, oxidation resistance, corrosion resistance, and good process ability, welding performance and long-term stability,so can manufacture all kinds of complex shape parts.In the aerospace, nuclear power, petroleum industry, Inconel718 obtained the extremely widespread application in the above temperature range.