INCOLOY alloy 909 is a high-strength alloy having a constant low coefficient of thermal expansion and an essentially constant rigidity up to 1200 F. The alloy is highly resistant to thermal fatigue and thermal shock. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Fe-81. Producer or source: Inco Alloys International Inc..