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Model No: S31803
Duplex S31803 stainless steel
Duplex S31803, also known as stainless steel grade 2205, is a standardized formulation that conforms to UNS specification regulations.
Delivery :
FOB
minimum order :
100 kilograms
Supply Ability :
5000Tonkilograms / Month
Stock Time :
7-10Day
Country of Origin :
CHINA
Quantity :
Duplex S31803, also known as stainless steel grade 2205, is a standardized formulation that conforms to UNS specification regulations. Its temperature range is typically listed as -50° to 300° C (-58° to 572° F); outside of this range, its performance characteristics degrade. Specifically, duplex S31803's micro-components experience precipitation with prolonged exposure to high temperatures, and ductility suffers with immersion in extremely cold environments.
Duplex S31803 stainless steel capabilities include
- Excellent oxidation resistance
- Outstanding performance in marine/sea water environments
- Low thermal expansion coefficients
- High heat conductivity
Property data given in this document is for covered by ASTM A959-2004 standard.
Duplex S31803 stainless steel chemical element composition content (%)
| Element | C | Si | Mn | P | S | Cr | Ni | Mo | N |
|---|---|---|---|---|---|---|---|---|---|
| Min | - | - | - | - | - | 21 | 4.5 | 2.5 | 0.08 |
| Max | 0.03 | 1 | 2 | 0.03 | 0.02 | 23 | 6.5 | 3.5 | 0.2 |
Duplex S31803 stainless steel Applications
- Seawater systems
- Seawater pumps and valves
- Chemical process vessels, piping, and heat exchangers
- FGD scrubber systems
- Pulp mill digesters, bleach washers
- Food process equipment
- Oil field piping
UNS S31803/2205 stainless steel consists of around 40-50% ferrite in the annealed condition. The duplex microstructure has the high strength of the ferritic grades whilst retaining the corrosion resistance of the austenitic grades. It is not uncommon to see the metal used as a practical solution to chloride-induced stress cracking, which is the achilles’ heel of stainless steel.
It has superior resistance to chloride pitting and crevice corrosion as compared to 317L stainless steel. The alloy has outstanding corrosion resistance to seawater and most concentrations of sulphuric acid. In addition, it is also resistant to sulphide stress corrosion cracking (sour-gas environments).
The high quality and therefore performance of UNS S32205 is widely attributed to the high levels of chromium present as well as nitrogen and molybdenum.
Lork Group – a leading supplier of Duplex Stainless Steel
Lork Group is an supplier in the supply of Duplex Stainless Steel and other high quality specialist engineering alloys.
To buy or learn more about S32750 contact us now, or fill in the enquiry form on the left hand side and we will be in touch shortly.
