What is the difference between nickel-based alloys and ordinary stainless steel?


In fact, in essence, nickel-based alloy is also a kind of stainless steel, but it is a special stainless steel, and the chemical composition of ordinary stainless steel is also different. Nickel-based alloy is a kind of high alloy stainless steel containing high nickel, high chromium and high molybdenum.

Among them, the famous is the steel containing 6% Mo(254SMo). This steel has good local corrosion resistance. It has good pitting corrosion resistance under seawater, aeration, gap and low-speed scouring conditions (PI ≥ 40), and has better stress corrosion resistance. It is an alternative material for nickel-based alloys and titanium alloys. Secondly, it has excellent high temperature or corrosion or corrosion resistance. In addition, according to the classification of stainless steel, the metallographic structure of special stainless steel is a stable austenitic metallurgical structure.

Because nickel-based alloy is a special material of high alloy, it is more complicated than ordinary stainless steel products in the production process. At present, most of them still rely on traditional processes for manufacturing, such as infusion, forging, rolling and other processes.