Super Duplex Steel Uns S32750 Coil Colds6
Super Duplex Steel Uns S32750 Coil Colds
12/02/2022
Alloy 20 Coils36
Alloy 20 Coils
12/02/2022

Instruction of Duplex Steel UNS s31803 Coils

Duplex 2205 is a two-phase, ferritic, austenitic 22% chromium, 3% molybdenum, 5 to 6% nickel alloyed stainless steel. It is the most widely used duplex stainless steel grade and is characterized by high yield strength, double that of the standard austenitic stainless steel grades. It also demonstrates good fatigue strength, as well as outstanding resistance to stress corrosion cracking, crevice, pitting, erosion, and general corrosion in severe environments.

Duplex Steel UNS s31803 Coils2
Duplex Steel UNS s31803 Coils
Duplex Steel UNS s31803 Coils3
Duplex Steel UNS s31803 Coils
Duplex Steel UNS s31803 Coils4
Duplex Steel UNS s31803 Coils
Duplex Steel UNS s31803 Coils5
Duplex Steel UNS s31803 Coils

Features of Duplex Steel UNS s31803 Coils

1. Duplex Steel Uns S31803 Coil Corossion Resistance:

  • Due to its high chromium, molybdenum, and nitrogen content, Duplex 2205 demonstrates superior corrosion resistant properties to 316 and 316L in most environments
  • Chromium, molybdenum, and nitrogen content also provide high resistance to pitting and crevice corrosion, even in oxidizing and acidic solutions
  • Resistant to chloride stress corrosion cracking and temperatures of up to about 302°F (150°C)
  • The presence of ferrite provides for good performance of Duplex 2205 in caustic environments

2. Duplex Steel Uns S31803 Coil Heat Resistance:

  • Similar to other duplex stainless steels, Duplex 2205 has good oxidation resistance at high temperatures
  • Subject to embrittlement when exposed to temperatures above 572°F (300°C) even when exposed for short periods of time; Duplex 2205 is therefore not recommended for use above 572°F (300°C)

3. Duplex Steel Uns S31803 Coil Welding Characteristics:

  • Possesses good weldability
  • Should not generally be welded without filler metal as this may result in excessive ferrite

4. Duplex Steel Uns S31803 Coil Heat Treatment:

  • Annealing temperature range is 1868 to 2012°F (1020 to 1100°C)
  • Cannot be hardened by heat treatment – but Duplex 2205 does work-harden
  • Special consideration is needed to compensate for a higher coefficient of thermal expansion to avoid warping and distortion

Marking and packaging of Duplex Steel UNS s31803 Coils

The packaging of our products (eg. weathered corrugated steel, weathering corrugated steel,corten steel columnl,hot rolled stainless steel plate) ensures that they will not be damaged during transport. For export purposes, the usual export packaging is done in wooden crates or crates. All hr sheet metal, plates and coils are marked with a logo (company mark), grade, size and batch number. On request, we can customise the marking on the product,such as spcc cold rolled steel.

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The Applications of Duplex Steel UNS s31803 Coils

  • 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

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