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Material

S32205 S31803 1.4462 Resistance to Corrosion






2205 duplex stainless steel is a cost effective solution for many applications where the 300 series stainless steels are susceptible to chloride stress corrosion cracking. Stress corrosion cracking occurs when stainless steels are subjected to tensile stress, while in contact with solutions containing chlorides. Increasing temperatures also increase the susceptibility of stainless steels to stress corrosion cracking.

The combination of chromium, molybdenum and nitrogen convey the good resistance of 2205 to chloride pitting and crevice corrosion. This resistance is extremely important for services such as marine environments, brackish water, bleaching operations, closed loop water systems and some food processing applications. The high chromium, molybdenum and nitrogen contents of 2205 provide corrosion resistance superior to common stainless steels, such as, 316L and 317L in most environments.

General Corrosion
Because of its high chromium (22%), molybdenum (3%), and nitrogen (0.18%) contents, the corrosion resistance properties of 2205 are superior to that of 316L or 317L in most environments.

Localized Corrosion Resistance
The chromium, molybdenum, and nitrogen in 2205 also provide excellent resistance to pitting and crevice corrosion even in very oxidizing and acidic solutions.

Isocorrosion Curves 4 mpy (0.1 mm/yr), in sulfuric acid solution containing 2000 ppm
Isocorrosion Curves 4 mpy (0.1 mm/yr), in sulfuric
acid solution containing 2000 ppm

Stress Corrosion Resistance
The duplex microstructure is known to improve the stress corrosion cracking resistance of stainless steels.

Chloride stress corrosion cracking of austenitic stainless steels can occur when the necessary conditions of temperature, tensile stress, oxygen, and chlorides are present. Since these conditions are not easily controlled, stress corrosion cracking has often been a barrier to utilizing 304L, 316L, or 317L.

Corrosion Fatigue Resistence
Alloy 2205 combines high strength and high corrosion resistance to produce high corrosion fatigue strength. Applications in which processing equipment is subject to both an aggresively corrosive enviroment and to cycle loading can benefit from the properties of 2205.

Critical Pitting Temperature in 1M NaCl Measured Using the AvestaPolarit Pitting Cell
Critical Pitting Temperature in 1M NaCl Measured
Using the AvestaPolarit Pitting Cell

Critical Crevice Corrosion Temperature (CCT) in 10% FeCl3•6H2O
Critical Crevice Corrosion Temperature (CCT)
in 10% FeCl3•6H2O

General Corrosion in Wet Process Phosphoric Acids

  Corrosion Rate, ipy
Grade Solution A, 1401/4F Solution B, 1201/4F
2205 3.1 3.9
316L >200 >200
904L 47 6.3
Composition, wt%
P2O5 HCl HF H2SO4 Fe2O3
Sol A 54.0 0.06 1.1 4.1 0.27
Sol B 27.5 0.34 1.3 1.72 0.4
Composition, wt%
P2O5 Al2O SiO2 CaO MgO
Sol A 54.0 0.17 0.10 0.20 0.70
Sol B 27.5 0.01 0.3 0.02 --

Stress Corrosion Cracking Resistance

Grade Boiling 42% MgCI2 Wick Test Boiling 25% NaCI
2205 Duplex F P P
254 SMO® F P P
Alloy 316L F F F
Alloy 317L F F F
Alloy 904L F F or P F or P
Alloy 20 F P P

(P=Pass, F=Fail)

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S31803 Stainless Steel Pipe

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

Corrosion of Piping
Corrosion Process
Surface Coatings for Corrosion
Corrosion Resistant Material
Bi- Metallic Corrosion.Galvanic Corrosion

1. Duplex Stainless Steel Pipe
2. Duplex Stainless Steel
3. Super-Duplex Stainless Steel
4. Principle of Duplex Stainless Steel
5. How the Austenite Ferrite Balance Achieved
6. Corrosion Resistance of Duplex Stainless Steel
7. Stress Corrosion Cracking SCC of Duplex Stainless Steel
8. Barrier to Using Duplex Stainless Steel
9. Duplex Stainless Steel Grades Comparison Table
10. S32101 | S31803 | S32205 | S32304 | S32750 | S32760
11. ASTM A789/A789M
12. ASTM A 790/A 790M
13. Duplex Stainless Steel Pipe
14. Austenitic-Ferritic Stainless Steel Pipe
15. Super-Duplex Stainless Steels and their characteristics
16. 2507 S32750 Duplex Steel Pipe
17. S31803 Stainless Steel Pipe
18. S32304(1.4362) Duplex Steel
19. S32205 Stainless Steel Pipe
20. 1.4462 Stainless Steel Pipe
21. Use of stainless steel under high temperature condition refer table
22. ASTM A789 S31803 Duplex Stainless Steel Pipe
23. ASTM A789 S32205 Duplex Stainless Steel Pipe
24. Duplex Stainless Steel Pipe Specification
25. ASTM A789 vs ASTM A790

Stainless Steel Tube/Pipe/Tubing, Nickel Alloy Tubing, Brass Alloy Tubing, Copper Nickel Pipe Material Grades


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EN 10216-5
ASTM A789 ASME SA 789 S31803 S32205 S32101 S32750 S32760 S32304 S31500 S31260 Seamless Tubes
EN 10216-5 1.4462 1.4362 1.4162 1.4410 1.4501 Seamless Tubes
Nickel Alloy Tubing:

UNS N08020 Alloy 20 Tubing
UNS N02200 Alloy 200 Tube
UNS N02201 Alloy 201 Pipe
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N06600 Inconel 600 Tube
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N06625 Inconel 625 Tubes
N08800 Incoloy 800 Tube
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UNS N08825 Incoloy 825 Pipe
ASTM B622 N10276 C276 Tubing
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C68700 Brass Seamless Tubes
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C71500 Copper Nickel Tubes
DIN 2391 Seamless Precision Steel Tubes
EN 10305-1 E215 E235 E355 Seamless Precision Steel Tube Tubing Tubes
DIN 2393 St28 St34.2 St37.2 St44.2 St52.3 Welded Precision Steel Tubes
EN 10305-2 E195 E235 E355 Welded Cold Drawn Precision Steel Tube