2205 dual phase steel F51 alloy

2205 (S31803, F51, 1.4462) Duplex Stainless Steel Overview:

2205 (S31803, F51, 1.4462) duplex steel is a new product successfully researched and developed in 2000. 2205 duplex steel is a nitrogen-added duplex stainless steel (referred to as 2205 duplex steel). Duplex stainless steel composed of chromium, 2.5% molybdenum and 4.5% nickel-nitrogen alloy. At present, domestic 2205 duplex steel products include welded pipes, seamless pipes, steel plates, bars, forgings, and strips. The early duplex stainless steels can withstand moderate strength uniform corrosion and chloride stress corrosion cracking, but when used under welding conditions, their performance will be greatly reduced. In order to improve this situation, nitrogen was added to the 2205 duplex steel, which not only increased the corrosion resistance, but also used well in welding. It has high strength, good impact toughness, and good overall and local resistance to stress corrosion.

The yield strength of 2205 duplex steel is twice that of austenitic stainless steel. This feature allows designers to reduce weight when designing products, giving this alloy a price advantage over 316 and 317L. This alloy is particularly suitable for use in the -50 ° F / + 600 ° F temperature range. Applications outside this temperature range can also be considered for this alloy, but have some limitations, especially when applied to welded structures. Due to the special performance characteristics of 2205 duplex steel, it has a wide range of applications, and is by far the most widely used grade in duplex steel.

 

Chemical composition of 2205 (S31803, F51, 1.4462) duplex stainless steel:

C≤	Si≤	Mn≤	P≤	S≤	Cr	Ni	Mo	N
0.03	1.00	2.00	0.030	0.020	21.0 23.0	4.50 6.50	2.50 3.50	0.08 0.20

 

Mechanical properties of 2205 (S31803, F51, 1.4462) duplex stainless steel:

Heat treatment system ℃	σb(Mpa) ≥	σs(Mpa)≥	δ%≥	Brinell	Rockwell
1020~1100	620	450	25	290	30.5

 

2205 (S31803, F51, 1.4462) Duplex stainless steel applications:

With medium to high strength and good resistance to ordinary corrosion / stress, corrosion / cracking. Applications include pumps, valves, flanges and piping systems that are widely used in the oil and gas, chemical, power and brewing industries.