Duplex Stainless Steel 2205 S32205 S31803 By yaang.com

DataTime:[2015-4-22]

Duplex Stainless Steel 2205 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.

Duplex Stainless Steel 2205 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 aferritic alloy stress corrosion cracking resistance and high strength with austenitic alloy ease of fabrication and corrosion resistance.
Duplex Stainless Steel 2205 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 steel, 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. Often referred to as the work horse grade, 2205 is the most widely used grade in the duplex stainless steel tube.
Usage of Duplex stainless steel 2205 should be limited to temperatures below 600° F. Extended elevated temperatureexposure can embrittle 2205 stainless.
1.4462 Composition % according to EN-10216-5:

C	Si	Mn	P	S	Cr	Mo	Ni	N	Cu
max. 0,03	max. 1,00	max. 2,00	max. 0,035	max. 0,015	21,00 - 23,00	2,50 - 3,50	4,50 - 6,50	0,10-0,22	-

S32205 Composition % according to ASTM A789 ASTM A790:

C	Si	Mn	P	S	Cr	Mo	Ni	N	Cu
max. 0,03	max. 1,00	max. 2,00	max. 0,030	max. 0,020	22,00 - 23,00	3,0 - 3,5	4,5 - 6,50	0,14-0,20	-

S31803 Composition % according to ASTM A789 ASTM A790:

C	Si	Mn	P	S	Cr	Mo	Ni	N	Cu
max. 0,03	max. 1,00	max. 2,00	max. 0,030	max. 0,020	21,00 - 23,00	2,5 - 3,5	4,50 - 6,50	0,08-0,20	-

General Properties
Application
Standards
Chemical Composition
Resistance to Corrosion
Physical Properties
Mechanical Properties
Structure
Welding
Processing
Machinability

Duplex Stainless Steel 2205 Product Information

Products	OD	Wall	Lengths and/or coils	Grades	OD	Wall	Lengths
	3/16" (4.76 mm) to 4" (101.6 mm)Metric sizes available	0.020" (0.51 mm) to 0.220" (5.59 mm)	Random or cut lengths up to 68' (20.7 m) Coils to 1-1/2" OD	Duplex 2205	<1-1/2" (38.1 mm) ±0.005" (0.13 mm) 1-1/2" (38.1 mm) to 3" (76.2 mm) ±0.010" (0.25 mm) 3-1/2" (88.9 mm) to 4" (101.6 mm) ±0.015" (0.38 mm)	±10%	Randoms up to +2" (50.8 mm) Cuts +1/8" (3 mm) -0" Coils to 80,000' (24,384 m)

Physical Properties of Duplex Stainless Steel Alloys in the Annealed Condition at -20°F to +100°F

			Tensile Strength			Yield Strength
Alloy	UNS Designation	Spec.	psi	MPa	ksi	psi	MPa	ksi	Elongation in 2 in. (min.) %	Grain SizeReq.	Max. Hardness	Modulus of Elasticity(x106 psi)	Mean Coefficient of Thermal Expansion (IN./IN./°F x 10-6)	Thermal Conductivity (BTU-in/ ft2-h-°F)
Duplex 2205	S32205	A789,A790	95,000	655	95	70,000	485	70	30	—	28 Rc, 30* Rc	27.5	7.6	180
Duplex 2205	S31803	A789, A790	90,000	620	95	65,000	450	70	30	—	28 Rc, 30* Rc	27.5	7.6	180

*OD over 1.0" TS>87, YS>58, no hardness requirement 1.0" OD and under

Duplex Stainless Steel Product Range

Alloy	UNS Designation	Werkstoff NR.	Specifications*
Duplex 2205	S31803/S32205	1.4462	A/SA789, A/SA790

*Note: The specifications noted including ASTM, ASME, or other applicable authorities are correct at the time of publication. Other specifications may apply for use of these materials in different applications.

Source: Yaang Pipe Industry Co., Limited (www.yaang.com)

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