ALLOY ZIRCONIUM R60702 STEEL PLATE

Due to the excellent corrosion resistance of zirconium, zirconium has been widely used in equipment such as acetic acid, PTA (Purified Terephthalic Acid), acetic anhydride, polyoxymethylene, and chlorinated polyethylene [1-4]. In recent years, with the development of China's industrial technology and in-depth research on zirconium materials, the domestication of sponge zirconium smelting and the production of plates, forgings, and tubes have been achieved [5-6]. With the large-scale development of China's chemical industry, the usage of zirconium materials has increased, and domestic material standards and design-manufacturing standards have been improved. In 2010, the General Administration of Quality Supervision, Inspection and Quarantine of China and the National Standardization Committee jointly issued the "Designations and Chemical Compositions of Zirconium and Zirconium Alloys" (GB/T 26314) standard. In the same year, the National Energy Administration issued the "Zirconium Pressure Vessels" (NB/T 47011) standard, providing standardized and normalized criteria for the design and manufacture of zirconium vessels. The "Regulations for Safety Technology Supervision of Stationary Pressure Vessels" (TSG 21-2016) also lists the NB/T 47011 standard as a harmonized standard. Welding of zirconium materials is a key process in equipment manufacturing, and qualified welding joint quality is crucial to ensuring the safe operation of equipment.

1. Introduction to Properties of R60702 Zirconium

1.1 Physical Properties

Zirconium is highly reactive and (easily oxidized by air), forming a dense oxide film on its surface, which enhances its corrosion resistance. Zirconium has a density of 6.49 g/cm³ and a melting point of 1845°C, which is higher than that of titanium, nickel, steel, copper, aluminum, and other materials. Its thermal conductivity at room temperature is approximately 20.8 W/(m・K), lower than that of copper, aluminum, and nickel, and close to that of titanium and austenitic stainless steel. The room-temperature thermal expansion coefficient of zirconium is lower than that of titanium, about 5.8×10⁻⁶/°C. Zirconium has a low elastic modulus, approximately 99.3 GPa at room temperature-only half that of steel. Under the same stress, the elastic deformation of zirconium is about twice that of steel [7].

 

 

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