The Domestic C919 Large Aircraft Titanium Alloy Consumption Reaches 9%

COMAC reported on July 23 that the six test aircraft of the C919 large passenger aircraft have successfully completed all test flight tasks and began to charge for certification. This is a crucial stage victory for the development of the C919 large passenger aircraft project.

    The C919 large passenger aircraft is a large civil jet aircraft with independent intellectual property rights in China. One of its features is its extensive use of localized advanced materials - titanium alloys for aircraft airframes and engines

    Compared with aluminum, nickel and other major aviation metals, titanium is the only material widely used in aircraft fuselage and engines, with good strength, heat resistance, corrosion resistance, elasticity and formability. Moreover, since the electrode potential of titanium and carbon fiber composites is similar, it becomes the only connecting material for composites, and is widely used in aviation fasteners.

    The front fuselage pressure plate, nose skin, suspension, central flange strip, tail joint, wing slide rail and other parts of the C919 aircraft are all made of titanium alloy, and the total amount is 9.3% of the weight of the fuselage structure. The C919 aircraft selected 6 titanium alloy grades, including low-strength and high-plasticity, medium-strength and medium-toughness, medium-strength and high-toughness, high-strength and high-toughness and system materials. Wait.

    The amount of C919 titanium material is about 3.92 tons per unit. Assuming that 1,200 C919s can be manufactured in the next 20 years, it is expected to bring 4,700 tons of aviation titanium demand without considering the loss rate, and the market space is broad.