UNS S32305 2205 F51


2205 duplex stainless steel plate in thicknesses from 3/16″ (4.8mm) through 6″ (152.4mm). The yield strength is about twice that of austenitic stainless steels, thus allowing a designer to save weight and making the alloy more cost competitive when compared to 316L or 317L.

Available thicknesses for Alloy 2205:

3/16″

1/4″

5/16″

3/8″

1/2″

5/8″

3/4″

7/8″

1″

1 1/8″

1 1/4″

1 3/8″

1 1/2″

4.8mm

6.3mm

7.9mm

9.5mm

12.7mm

15.9mm

19mm

22.2mm

25.4mm

28.6mm

31.8mm

34.9mm

38.1mm

1 5/8″

1 3/4″

2″

2 1/4″

2 1/2″

2 3/4″

3″

3 1/4″

3 1/2″

4″

5″

6″

 

41.3mm

44.5mm

50.8mm

57.2mm

63.5mm

69.9mm

76.2mm

82.6mm

88.9mm

101.6mm

127mm

152.4mm

 

Alloy 2205 (UNS S32305/S31803) is a 22% chromium, 3% molybdenum, 5-6% nickel, nitrogen alloyed duplex stainless steel plate with high general, localized, and stress corrosion resistance properties in addition to high strength and excellent impact toughness.

Alloy 2205 duplex stainless steel plate provides pitting and crevice corrosion resistance superior to 316L or 317L austenitic stainless steels 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.

General Properties

Alloy 2205 duplex stainless steel plate is a 22% Chromium, 3% Molybdenum, 5-6% Nickel nitrogen alloyed duplex stainless steel plate with high general, localized and stress corrosion resistance properties in addition to high strength and excellent impact toughness.

Alloy 2205 duplex stainless steel plate provides pitting and crevice corrosion resistance superior to 316L or 317L austenitic stainless steels 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 yield strength is about twice that of austenitic stainless steels. This allows a designer to save weight and makes the alloy more cost competitive when compared to 316L or 317L.

Alloy 2205 duplex stainless steel plate is particularly suitable for applications covering the -50°F/+600°F temperature range. Temperatures outside this range may be considered but need some restrictions, particularly for welded structures.

Applications

1.Pressure vessels, tanks, piping, and heat exchangers in the chemical processing industry

2.Piping, tubing, and heat exchangers for the handling of gas and oil

3.Effluent scrubbing systems

4.Pulp and paper industry digesters, bleaching equipment, and stock-handling systems

5.Rotors, fans, shafts, and press rolls requiring combined strength and corrosion resistance

6.Cargo tanks for ships and trucks

7.Food processing equipment

8.Biofuels plants

Chemical Composition:

 

Cr

Ni

Mo

Co

Nb (+Ta)

Ti

V

W

Cu

C

Mn

N

Si

P

S

Fe

Al

Min 19.50 17.50 6.00           0.50     0.18          
Max 20.50 18.50 6.50           1.00 0.02 1.00 0.22 0.80 0.03 0.01 Bal  

Mechanical Properties:

Notes:

1、Testing shall be carried out in accordance with ASTM A370 or EN ISO 6892-1 (tensile), EN ISO 6506-1 (hardness)

2、Minimum properties quoted (tested at room temperature in a longitudinal direction)

3、Testing performed on each melt of material per heat treatment batch

4、Additional tests routinely undertaken:

5、ASTM G48A corrosion test (at 50°C) No pitting (at 20x magnification) and < 4.0g/m2 weight loss

Physical Properties:

Density (Kg/m3) 8000
Magnetic Permeability (20°C) <1.05
Young’s Modulus (kN/mm2) 200
Specific Electrical Resistance, 20°C (Ω-m) 0.85
Mean coefficient of thermal expansion, 20-100°C (m/m/degC) 16.5
Specific Heat, 20°C (J/kg.K) 500
Thermal conductivity, 20°C (W/m.K) 13.5