The C series alloys are nickel-chromium-molybdenum alloys.

Alloys can be used in environments with both oxidizing and reducing media. C series alloy is the most widely used alloy, especially C-276 alloy, since the invention of the 1960s, after more than 40 years of testing still shows a strong vitality. The C-4 was developed primarily to meet the needs of a small number of European users and is currently only seen in older devices. The C-22 alloy offers increased corrosion resistance at no additional cost and is particularly cost-effective. The C-2000® is a new generation product that offers a wider range of safe uses and is ideal for users who want to improve the life of their equipment and test new processes. At present, C series alloys have been applied in many industries in China. Such as fine chemical industry (TDI,PTA, acetic acid/anhydride, acrylic acid, etc.); Environmental engineering industry (FGD, Sewage treatment); Plate heat exchanger industry, etc. There are many industries abroad have been applied Hastelloy, and the domestic is still in the test stage, such as pharmaceutical industry.

Series B alloys are nickel-molybdenum alloys that provide superior corrosion resistance in a fully reduced environment. Series B alloys, although excellent in reducing environments, are very sensitive to oxidizing media (iron, copper ions). The 50ppm iron ion is enough to reduce the corrosion resistance of the B series alloy significantly. B series alloys are mainly used in acetic acid production (carbonyl synthesis method) due to their special properties, and some sulfuric acid recovery systems also use this series of alloys. At present, B-3 is widely used. B-2 has been gradually withdrawn from the market due to the lack of processing performance.