Pitting Resistance Duplex Stainless Steel Low Thermal Expansion Coefficient
Brand Name:JIN LAI
Certification:ISO SGS
Model Number:2205
Minimum Order Quantity:3 tons
Delivery Time:within 15-20 days after deposit
Payment Terms:T/T, Western Union, L/C
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Wuxi Jiangsu China
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NO.21 Dongting Road,Xishan District,Wuxi ,Jiangsu,China
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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.
Chemical Composition (%) of 2205 Duplex Stainless Steel Plate
| C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 2205 (S31803) | 0.03 | 2.0 | 1.0 | 0.03 | 0.02 | 21.0- 23.0 | 2.5-3.5 | 4.5-6.5 | 0.08-0.20 |
| 2205 (S32205) | 0.03 | 2.0 | 1.0 | 0.03 | 0.02 | 22.0-23.0 | 3.0-3.5 | 4.5-6.5 | 0.14-0.20 |
Mechanical Properties of 2205 Duplex Stainless Steel Plate
| Grade | Tensile Strength ksi (min) | Yield Strength 0.2% ksi (min) | Elongation % | Hardness (HB) MAX |
| 2205 | 90 | 65 | 25 | 217 |
Physical Properties of 2205 Duplex Stainless Steel Plate
| Density lbm/in3 | Electrical Resistivity mW•in | tdermal Conductivity (BTU/hr•ft•°F) | Heat Capacity BTU/lbm•°F | Electrical Resistivity (in x 10-6) | |
| at 68°F | 0.278 | 27.6 | 8.7 | 0.112 | 33.5 |
| at 212°F | 26.1 | 9.2 | 0.119 | 35.4 | |
| at 392°F | 25.4 | 9.8 | 0.127 | 37.4 | |
| at 572°F | 24.9 | 10.4 | 0.134 | 39.4 |
2205 Duplex Stainless Steel Plate Processing – Hot Forming:
Most Duplex 2205 producers recommend a maximum hot forming temperature between 2010 and 2100°F (1100 to 1150°C). If the shape of the work piece is not compact, the edges may be significantly cooler than the bulk, and there is risk of cracking in the cooler regions.
2205 Duplex Stainless Steel Plate Processing – Cold Forming:
Duplex 2205 has shown good formability in a variety of fabrications. The high strength of Duplex 2205 can pose problems. Even when the equipment has sufficient power, allowance must be made for higher spring-back caused by the grade’s high strength.
2205 Duplex Stainless Steel Plate Applications:
- Chemical processing, transport and storage – pressure vessels, tanks, piping, and heat exchangers
- Oil and gas exploration and processing equipment – piping, tubing, and heat exchangers
- Marine and other high chloride environments
- Effluent scrubbing systems
- Pulp and paper industry – digesters, bleaching equipment, and stock-handling systems
- Cargo tanks for ships and trucks
- Food processing equipment
- Biofuels plants
2205 Duplex Stainless Steel Equivalent Standards:
- ASTM/ASME: A240 UNS S32205/S31803
- EURONORM: 1.4462 X2CrNiMoN 22.5.3
- AFNOR: Z3 CrNi 22.05 AZ
- DIN: W.Nr 1.4462
- 2205 is a duplex (austenitic-ferritic) stainless steel containing
about 40 - 50% ferrite in the annealed condition. 2205 has been a
practical solution to chloride stress corrosion cracking problems
experienced with 304/304L or 316/316L stainless. The high chromium,
molybdenum and nitrogen contents provide corrosion resistance
superior to 316/316L and 317L stainless in most environments.
2205 is not suggested for operating temperatures up to 600°F.
The design strength of 2205 is significantly higher than 316/316L, often permitting lighter wall construction.
2205 has good notch impact toughness down to temperatures below - 40°F. 2205 is welded with E2209 or ER2209 fillers.
Hairline Finish Stainless Steel Sheet Chemistry
| Ni | Cr | Mo | Mn | Si | C | N | S | P | Fe | |
| MIN | 4.5 | 22.0 | 3.0 | - | - | - | 0.14 | - | - | - |
| MAX | 6.5 | 23.0 | 3.5 | 2.0 | 1.0 | 0.03 | 0.2 | 0.02 | 0.03 | Balance |
Hairline Finish Stainless Steel Sheet Mechanical Properties
| Temperature, °F | 70 | 212 | 392 | 572 |
| Coefficient* of Thermal Expansion, in/in°F x 10-6 | - | 8 | 8 | 8 |
| Thermal Conductivity Btu • ft/ft2 • hr • °F | 8 | 9 | 10 | 11 |
| Modulus of Elasticity, Dynamic psi x 106 | 28 | 26 | 25 | 24 |
- * 70°F to indicated temperature.
Mechanical Properties
Minimum Specified Properties, ASTM A 240
| Ultimate Tensile Strength, ksi | 95 |
| 0.2% Yield Strength, ksi | 65 |
| Elongation, % | 25 |
| Hardness MAX, Brinell | 290 |
- Minimum Elevated Tensile Properties, Plate
| Temperature, °F | 212 | 302 | 392 | 482 |
| Ultimate Tensile Strength, ksi | 86 | 83 | 80 | 78 |
| 0.2% Yield Strength, ksi | 52 | 49 | 46 | 44 |
- Corrosion Resistance
| PREn | Critical Pitting Temperature, CPT | |
| 2205 | 34 | 130°F |
| 316L | 24 | 62°F |
Pitting Resistance Duplex Stainless Steel Low Thermal Expansion Coefficient
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