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Home > Materials category > DUPLEX STEEL > S32205, S31803, 1.4462

S32205, S31803, 1.4462

	S32205、S31803（1.4462）
Summary	Alloy S32205 S31803 is a 22% chromium, 3% molybdenum, 5-6% nickel, nitrogen alloyed duplex stainless steel with high general, localized, and stress corrosion resistance properties in addition to high strength and excellent impact toughness. Alloy S32205 S31803 provides pitting and crevice corrosion resistance superior to 316L or 317L austenitic stainless steel in almost all corrosive media. It also has high corrosion and erosion fatigue properties as well as lower thermal expansion and higher thermal conductivity than austenitic. The advantage of a duplex structure is that it combines the favorable qualities of a ferritic alloy stress corrosion cracking resistance and high strength with austenitic alloy ease of fabrication and corrosion resistance. Duplex S32205 S31803 is a nitrogen enhanced duplex stainless steel that was developed to combat common corrosion problems encountered with the 300 series stainless steel. “Duplex” describes a family of stainless steel that are neither fully austenitic, like 304 stainless, nor purely ferritic, like 430 stainless steel. The structure of 2205 duplex stainless steel consists of austenitic pools surrounded by a continuous ferritic phase. In the annealing condition, 2205 contains approximately 40-50% ferrite. Ofen referred to as the work horse grade, 2205 is the most widely used grade in the duplex stainless steel tube.
Products
omposition Wt,%	S32205 Composition % according to ASTM A789 ASTM A790
	C	Si	Mn	P	S	Cr	Mo	Ni	N	Cu
Min						22.00	3.00	4.50	0.14
Max	0.03	1.00	2.00	0.030	0.020	23.00	3.50	6.50	0.20
S31803 Composition % according to ASTM A789 ASTM A790
	C	Si	Mn	P	S	Cr	Mo	Ni	N	Cu
Min						21.00	2.50	4.50	0.08
Max	0.03	1.00	2.00	0.030	0.020	23.00	3.50	6.50	0.20
UNS	Psi	Mpa	Ksi
S32205	95000	655	95
S31803	90000	620	95
UNS	Psi	Mpa	Ksi	Elongation in 2 in (min.)%	Max. Hardness	Modulus of Elasticity (x 106 psi)	Mean Coefficient of Thermal Expansion (IN_/IN_/℉ x10-6)
S32205	70000	485	70	30	28Rc 30*Rc	27.5	7.6
S31803	90000	450	70	30	28Rc 30*Rc	27.5	7.6