Duplex (1.4462)

(UNS 32205/31803)

Duplex 2205 is a nitrogen enhanced duplex stainless steel that was developed to combat common corrosion problems encountered with the 300 series stainless steels.

	Cr	Ni	Mo	C	N	Mn	Si	P	S	Fe
Min	22	4.5	3.00	0.03	0.14	2.0	1.0	0.03	0.20	Bal.
Max	23	6.5	3.5	-	0.2	-	-	-	-	Bal.

What are the characteristics of Duplex 2205?
• High resistance to chloride stress corrosion cracking
• Resistance to chloride pitting and crevice corrosion
• Good general corrosion resistance
• Good sulfide stress corrosion resistance
• High Strength
• Good weldability and workability


In what applications is Duplex 2205 used?
• Chemical process vessels, piping and heat exchangers
• Pulp mill digesters, bleach washers, chip pre-steaming vessels
• Food processing equipment
• Oil field piping and heat exchangers
• Flue gas desulfurization equipment