Duplex stainless steel is a form of stainless steel that has two phases: ferrite and austenite. It improves stress corrosion cracking resistance, which is a weakness of austenitic and ferritic stainless steels. Super Duplex Sheet performs admirably. As a result, the application is spreading to a variety of areas, including the petrochemical industry, chemical tankers, offshore constructions, and bridges. The following are some of the benefits and advantages of Duplex 2205 Sheet.
It is a stainless steel substance with an austenite and a ferrite structure that coexists. It is also known as a dual-phase alloy. The two-phase system's most notable property is its resistance to stress corrosion cracking. It is magnetic due to its ferrite structure. The coefficient of thermal expansion is between ferrite and austenite. Ductility is a feature comparable to ferrite in that it has high strength, excellent corrosion resistance, and is cost effective. It is utilised in chemical plants, water tanks, reservoirs, oil well pipelines, chemical tankers, and other similar applications. If the amount of N injected is insufficient, the welded part's toughness and corrosion resistance would suffer.
Characteristics of duplex stainless steel:
The microstructure of Duplex Stainless Steel 2205 Plate is a high distribution of austenite phase inside the ferrite matrix, as well as the ratio of both phases in the proper heat treatment state is roughly 1:1. This condition has the most stable microstructure and can withstand the strength of duplex stainless steel. When compared to typical austenitic stainless steels, Super Duplex 2507 Sheet has the following properties.
- It is feasible to create a high strength thin and lightweight design with a strength nearly double that of SUS304 and SUS316 (0.2% proof stress comparison).
- Ferralium 255 Plate offers high pitting corrosion resistance and superior stress corrosion cracking resistance than general-purpose austenitic steel.
- Price consistency. Because UNS S32750 Plate has less nickel and molybdenum than general-purpose austenitic steel, there is essentially no danger of raw material price volatility.
- Thermal conductivity and low thermal expansion coefficient
- Strength at high room temperature
- Pitting corrosion and stress corrosion cracking resistance
Advantages such as:
- The concentration of nitrogen is high.
- Heat treatment results in significant structural changes as well as changes in other properties such as corrosion resistance.
Main uses:
- Petrochemical plants, chemical tankers, and environmental facilities (flue gas desulfurization equipment, etc.)
- In terms of composition, duplex stainless steel is divided into three grades: regular, super, and lean.
- A standard duplex stainless steel with the following composition: 22%Cr-5%Ni-3%Mo-0.15%N.
- Increase the room temperature strength and pitting corrosion resistance by primarily increasing the Mo and N content from the norm.
- A business is attempting to save money by lowering the Ni and Mo content from the norm. By the way, "lean" is slang for "thinned."
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