Hastelloy is a type of nickel-based alloy, which is made of metal materials such as nickel, chromium, iron and molybdenum. Many manufacturers use alloys for the high corrosion resistance of this metal material. The main reason is that the metal material contains a large amount of nickel, so the corrosion resistance of Hastelloy is much stronger than that of other metal materials.
Hastelloy is currently divided into three series: B, C, and G. It is mainly used in highly corrosive media situations where iron-based Cr-Ni or Cr-Ni-Mo stainless steel, non-metallic materials, etc. cannot be used. It has been used at home and abroad. It is widely used in petroleum, chemical industry, environmental protection and many other fields. In order to improve the corrosion resistance and cold and hot working properties of Hastelloy, Hastelloy has made three major improvements. The development process is as follows:
B series: B → B-2 → B-3
C series: C → C-276 → C-4 → C-22 → C-2000
G series: G → G-3 → G-30
The most widely used ones at present are the second generation materials N10665(B-2), N10276(C-276), N06022(C-22), N06455(C-4) and N06985(G-3). The third generation materials N10675 (B-3), N10629 (B-4), and N06059 (C-59) are in the promotion stage. Due to the advancement of metallurgical technology, multiple grades of "super stainless steel" containing 6% Mo have appeared in recent years, replacing G series alloys, causing a rapid decline in the production and use of G series alloys.
Hastelloy not only has strong corrosion resistance, but also has high stability. Therefore, the range of application capabilities is also constantly expanding, especially in the aerospace and chemical fields. During the installation and use of alloy materials, it is not easily affected by the social environment. Influence. In the chemical industry, due to the large amount of corrosive substances in the production process, Hastelloy materials can withstand higher corrosion resistance compared with other anti-oxidation materials and raw materials. Therefore, the application of this alloy gold house material in the chemical industry is very important.
At present, Hastelloy is also widely used in heat ex-changers, paper industry and other processing places. The application prospects of this alloy material will be even wider.