duplex stainless steel 2205

Inquiries : 153 - 2018/12/13 9:51:21

The 2205 alloy ( UNS S32305/S31803 ) is a duplex stainless steel consisting of 22% chromium, 3% molybdenum and 5-6% nickel-nitrogen alloy. It has high strength, good impact toughness and good overall and local resistance to strong corrosion.

Compared with 316L and 317L austenitic stainless steels, 2205 alloy has superior corrosion resistance and crack resistance. It has high corrosion resistance and its thermal expansion coefficient is lower than that of austenite. More sexual.

Compared with austenitic stainless steel, it has twice the compressive strength. Compared with 316L and 317L, the designer can reduce its weight and the cost is lower.

Feature overview:

2205 Duplex Stainless Steel 2205 alloy is a duplex stainless steel consisting of 22% chromium, 3% molybdenum and 5-6% nickel-nitrogen alloy. It has high strength, good impact toughness and good overall and

local resistance to stress corrosion.

Compared with 316L and 317L austenitic stainless steel, 2205 alloy has superior performance in resisting plaque and crevice corrosion. It has high corrosion resistance and its thermal expansion coefficient is lower than that of austenite. More sexual.

Compared with austenitic stainless steel, it has twice the compressive strength. Compared with 316L and 317L, the designer can reduce the weight and therefore the cost is lower. This alloy is particularly suitable for use in the temperature range of -50 °F / +600 °F, and can be used for lower temperatures under severe restrictions (especially for welded structures).

Application field:

1.Pressure vessels, high pressure storage tanks, high pressure pipelines, heat exchangers (chemical processing industry).

2.Oil and gas pipelines, heat exchanger fittings.

3. Sewage treatment system.

4.Pulp and paper industry classifiers, bleaching equipment, storage processing systems.

5.Rotary shafts, press rolls, blades, impellers, etc. in high-strength, corrosion-resistant environments.

6.Ship or truck cargo box

7. Food processing equipment

Standard:

ASTM/ASME...........A240 UNS S32205/S31803

EURONORM...........1.4462 X2CrNiMoN 22.5.3

AFNOR....................Z3 CrNi 22.05 AZ

DIN......................... W. Nr 1.4462

Corrosion resistance:

1.General corrosion due to its higher chromium

Molybdenum and nitrogen content, 2205's corrosion resistance is superior to 316L and 317L in most environments

2. Local corrosion resistance

The content of chromium, molybdenum and nitrogen in 2205 makes it highly resistant to rust and crevice corrosion in corrosive and acidic solutions.

Corrosion curve 4 mpy (0.1 mm/yr) in a sulfuric acid solution containing 2000 ppm of chloride

3. Stress corrosion resistance

The duplex microstructure of stainless steel helps to increase its resistance to stress crevice corrosion.

Chloride stress corrosion can occur in the presence of certain temperatures, pressures, oxygen and chlorides. Because these conditions are not suitable for control. The use of 304L, 316L and 317L is limited in this respect.

5.Fatigue strength corrosion

The high strength and corrosion resistance of the 2205 alloy gives it a high resistance to corrosion and fatigue. Mainly used in environments with strong corrosiveness.

The critical temperature of erosion in 1M NaCl was measured using an AvestaPolarit etched cell.

Critical temperature of crack corrosion in 10% FeCl3·6H2O