Duplex 2205 Stainless Steel

2205 is a duplex stainless steel with a chemical composition of nearly equal proportions of austenite and ferrite.

Duplex 2205 stainless steel. If embrittled this can only be rectified by a full solution annealing treatment. Its most important properties are excellent corrosion resistance and high strength. Saf duplex 2205 stainless steel uns s32205 s31803 alloy material. Duplex stainless steels like 2205 also maintain good weldability in their thickest sections and they are much more resistant to stress.

276 is a group of iron based alloys that contain a minimum of approximately 11 chromium. 3 a composition that prevents the iron from rusting as well as providing heat resistant properties. It is the most widely used duplex stainless steel grade and is characterized by high yield strength double that of the standard austenitic stainless steel grades. Duplex 2205 stainless steel 1 4462 corrosion resistance is superior to grade 316 in most environments.

Heat treatment of duplex ss 2205 is solution treatment annealing between 1020 1100 c followed by rapid cooling. It is has an excellent corrosion resistance including in seawater it is weldable by all standard methods and has a high heat. Applications include chemical processing oil and gas exploration marine and other high chloride environments and paper digestors. 2205 is annealed at 1020 1100 o c followed by rapid cooling.

The 2205 grade steel is one of the most widely used ferritic and austenitic duplex stainless steel. Saf duplex 2205 stainless steel uns s32205 formerly known as uns s31803 and commonly known as alloy 2205 has a mixed microstructure of austenite and ferrite and is a two phase alloy based on the fe cr ni series. 2205 is the most widely used duplex ferritic austenitic stainless steel grade. 2205 duplex stainless steel 2205 duplex cannot be hardened by heat treatment.

3 different types of stainless steel include the elements carbon from 0 03 to greater than 1 00 nitrogen aluminium silicon sulfur titanium nickel copper selenium niobium. Duplex 2205 is a two phase ferritic austenitic 22 chromium 3 molybdenum 5 to 6 nickel alloyed stainless steel. 2205 is a duplex austenitic ferritic stainless steel containing about 40 50 ferrite in the annealed condition. Alloy 2205 material has lower nickel and molybdenum contents than austenitic stainless steel and have.

2205 has been a practical solution to chloride stress corrosion cracking problems experienced with 304 304l or 316 316l stainless. Although 2205 has good high temperature oxidation resistance this grade like other duplex stainless steels suffers from embrittlement if held for even short times at temperatures above 300 o c.