Duplex Stainless Steel 2205 Elbow

Are you searching for pipe fittings capable of withstanding both ultra-high pressures and extreme chloride-induced corrosion? In the seawater desalination, oil and gas, and chemical processing industries, standard austenitic stainless steel elbows (such as 316L) frequently suffer premature failure due to pitting corrosion, crevice corrosion, or stress corrosion cracking (SCC). What do we offer? We supply high-quality Duplex 2205 (UNS S31803/S32205) elbows that comply with the ASME B16.9 standard. Our products not only deliver strength that is double that of standard stainless steel but also enable you to significantly reduce maintenance costs throughout the entire product lifecycle.

 

Duplex Stainless Steel 2205 Elbow Specification

Dimensions	ASME B16.28, MSS-SP-43, ASME/ANSI B16.9, BS4504, BS10, BS4504, BS1560,
Thickness	SCH10, SCH 80, SCH 100, SCH20, SCH30, STD SCH40, SCH 160, XXS, SCH60, XS, SCH 120, SCH 140, available with NACE MR 01-75
Type	DN15-DN1200
Connection	Welding
Bending Radius	R=2D, 3D, 5D, 6D, 8D, 1D, 10D or Custom
Manufacturing process	Press, Forge, Push, Cast, etc.
Specialized manufacturer of	Tees, Crosses, Reducers, 90º Elbows, Stub End, Pipe Bend, 45º Elbows, Pipe Cap

 

Chemical Composition (%)

Grade	Cr	Ni	Mo	N (Nitrogen)	C (max)
2205	22.0 - 23.0	4.5 - 6.5	3.0 - 3.5	0.14 - 0.22	0.030

 

Mechanical Properties

Indicator	2205 (UNS S32205)	316L (Comparison)
Yield Strength	≥ 450 MPa	≥ 170 MPa
Tensile Strength	≥ 620 MPa	≥ 485 MPa
Elongation	≥ 25%	≥ 40%

Duplex Stainless Steel 2205 Elbow Dimensions

Nominal Size		Outside Diameter at Bevel	Center to End
			90 ° Elbows		45 ° Elbows
			A		B
DN	NPS	OD	LR	SR	LR
15	1/2	21.3	38	–	16
20	3/4	26.7	38	–	19
25	1	33.4	38	25	22
32	1 1/4	42.2	48	32	25
40	1 1/2	48.3	57	38	29
50	2	60.3	76	51	35
65	2 1/2	73	95	64	44
80	3	88.9	114	76	51
90	3 1/2	101.6	133	89	57
100	4	114.3	152	102	64
125	5	141.3	190	127	79
150	6	168.3	229	152	95
200	8	219.1	305	203	127
250	10	273	381	254	159
300	12	323.8	457	305	190

 

Weight Reference Chart (Stainless Steel 2205 90° LR Elbow)

Note: Based on ASME B16.9 standards. Material density: 7.8 g/cm³.

Nominal Pipe Size (NPS)	Outer Diameter (mm)	Sch 10s Weight (kg)	Sch 40s Weight (kg)	Sch 80s Weight (kg)
2"	60.3	0.48	0.69	0.94
4"	114.3	2.10	3.12	4.41
6"	168.3	5.25	8.85	13.0
8"	219.1	10.3	18.2	27.1
10"	273.0	17.5	31.8	48.2

 

FAQ

Q1: What is the difference between UNS S31803 and S32205 elbows?
A: S32205 is a high-nitrogen enhanced version of S31803. It offers a more precise chemical range and improved corrosion resistance. Our elbows are typically "Dual Certified" to meet both standards.

Q2: Is welding 2205 elbows difficult?
A: Not with the right approach. 2205 has excellent weldability. We recommend using ER2209 filler metal and maintaining a strict interpass temperature (below 150°C) to ensure the proper balance of the ferrite-austenite phases.

Q3: Why choose 2205 over 316L for seawater applications?
A: 316L has a PREN of ~24, making it vulnerable to pitting in stagnant seawater. 2205 has a PREN of ~35, providing far superior protection against chlorides and significantly higher resistance to high-pressure flow erosion.