Heat Exchanger Duplex Stainless Steel Tube USN31803/2205 Wall Thickness 0.3mm-30mm
Duplex and Super duplex stainless steel USN31803/2205 Heat Exchanger Tube
The 2205 grade steel is one of the most widely used ferritic and austenitic duplex stainless steel. The standard of this grade of steel has been refined over the years creating a versatile and strong product. It is has an excellent corrosion resistance (including in seawater), it is weldable by all standard methods, and has a high heat resistance.
Features
- Corrosion Resistance: 2205 stainless stands-up excellently in a range of atmospheric environments even when exposed to corrosive elements, specifically to sea water.
- Heat Resistance: Generally, 2205 is not suitable for use at temperatures above 300°C as it suffers from precipitation of brittle micro-constituents.
- Avoid temperatures below -50°C because of its ductile-to-brittle-transition.
- Easy to weld with excellent weldability.
- The high strength of 2205 also makes bending and forming more difficult.
Applications can be used in chemical processing, transport, and storage for a variety of industries due to both its excellent corrosion resistance and high strength.
Specifications:
UNS S31803
ASME SA-182 (F51), SA-240, SA-798, SA-790, SA-815
ASTM A182 (F51),A240, A276, A479, A789, A790, A815, A928, A988
SAE J405
UNS S32205
ASME SA-182 (F60), SA-240, SA-798, SA-790, SA-815
ASTM A182 (F60), A240, A276, A479, A480, A798, A790, A815, A928, A988
SAE J405
Specifications of Duplex Stainless Steel Welded Tube
1. Standard: ASTM ASME
2. Grade: 630 / 631 / 2205 / 2507 / 17-4PH
ASTM A789, ASTM A790, ASTM A450, ASTM A530,
GB/T 14976, GB/T 14975, GB/T 13296, etc
3. OD: 8mm-1000mm
4. Wall thickness: 0.3mm-30mm
5. Length: max.18000mm or as demand
6. Surface finish: Polishing (180#,220#,240#,320#400#,600#), Hairline, acid pickled, etc.
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 above 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.
Features
- High resistance to chloride stress corrosion cracking
- Chloride pitting and crevice corrosion resistance superior to 317L stainless
- Good general corrosion resistance
- High strength
- Good sulfide stress corrosion resistance
- Useful up to 600°F
Applications
- Chemical process vessels, piping, and heat exchangers
- FGD scrubber systems
- Pulp mill digesters, bleach washers, chip presteaming vessels
- Food process equipment
- Oil field piping, heat exchangers
Specifications:
| Specifications (ASTM/ASME) Duplex Stainless Steel Pipe | ||||
| Alloy | UNS Designation | Material Specification |
Tubing Specification |
Pipe Specification |
| 2205 | S31803/S32205 | A 240/SA-240 | A 270 | A 790/SA-790 |
| A 789/SA-789 | A928/SA928 | |||
Chemical Compositions:
| Chemical Composition (%) Duplex Stainless Steel Pipe | ||
| Alloy | 2205 | 2205 |
| UNS Designation | S31803 | S32205 |
| Carbon (C) max. | 0.030 | 0.030 |
| Manganese (Mn) max. | 2.00 | 2.00 |
| Phosphorus (P) max. | 0.030 | 0.030 |
| Sulfur (S) max. | 0.020 | 0.020 |
| Silicon (Si) max. | 1.00 | 1.00 |
| Chromium (Cr) | 21.0 - 23.0 | 22.0 - 23.0 |
| Nickel (Ni) | 4.5 - 6.5 | 4.5 - 6.5 |
| Molybdenum (Mo) | 2.5 - 3.5 | 3.0 - 3.5 |
| Nitrogen (N) | 0.08 - 0.20 | 0.14 - 0.20 |
| Iron (Fe) | Balance | Balance |
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