ypsum is generally white powdery crystals, as well as gray and reddish yellow crystals It belongs to the monolithic crystal system In terms of composition, it is divided into dihydrate gypsum and anhydrous gypsum The ceramic industry mold production application is generally dihydrate gypsum It uses the characteristics of dihydrate gypsum that it loses part of the crystal water after being calcined at a low temperature of about 180 degrees Celsius, and becomes a dry powder, which can absorb w

GR2 titanium is a silver-white metal with a density of 4 5g cm3 (20℃) and a melting point of 1668℃ Gr2 Titanium and titanium alloy materials have the characteristics of good corrosion resistance, low density and high specific strength They are widely used in aerospace, chemical equipment, seawater desalination, sports goods, medicine, machinery manufacturing, daily necessities and military fields

Inconel 690 (UNS N06690) nickel-based alloy has a chromium content of 27 0-31 0% and a nickel-based alloy with a nickel content of approximately 59% Inconel 690 (UNS N06690) nickel-based alloy has excellent resistance to intergranular corrosion and intergranular stress The ability of corrosion cracking is mainly used for heat transfer tubes of steam generators in PWR nuclear power plants

The machining of TC4 titanium alloy is very difficult The comprehensive process of titanium and titanium alloy is very different from steel, aluminum alloy and many heavy metals in terms of crystal structure, physical properties and chemical properties Alloy is a metal that is not easy to process