*2.2.3.4 Some hardbandings made in China*

In addition to Kooben products, some "casing-friendly" materials can be occasionally reported on the Internet, and most of them imitate the foreign products. For example, Nate707J hardbanding material developed by Xi'an Nate Petroleum Technology Co., Ltd., is an iron-based amorphous hardbanding alloy, whose wear resistance is basically equivalent to that of ARMACOR Mstar and 3.8–3.9 times of that of ARNCO 100XT [26]; BoTn3000 hardbanding material produced by Shanghai BoTeng Welding Consumables Co., Ltd., is a chrome-free hardbanding material with high hardness and good wear resistance, which has reached the advanced level of similar products abroad [27]. In addition, some China units, universities, research institutes, and other institutions are studying the production of new hardbanding materials. Although China's "casing-friendly" hardbanding materials have started, some hardbanding materials have made great progress. Some properties are even better than similar foreign hardbanding materials. However, most of them are still in the research and experimental stage and have not been mass-produced and put into application [28].
