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UNS S31803 Duplex 2205 Seamless Stainless Steel Tubing High Heat Conductivity

Categories Duplex Stainless Steel Pipe
Brand Name: Best
Model Number: 1/4' -48''
Certification: API/CE/ ISO /
Place of Origin: China
MOQ: 1 Pcs
Price: 1200 usd/ton
Supply Ability: 10000 Ton/Moth
Delivery Time: 5-8 working days
Packaging Details: Regular shipping packaging or depends on customer's requirement
Standard: ASTM A790
Grade: S31803
Type: Seamless Duplex Stainless Steel Pipes
Place of origin: China
Material: 2205/2507
Production Year: 2018
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UNS S31803 Duplex 2205 Seamless Stainless Steel Tubing High Heat Conductivity

Production Name : Super Duplex Stainless Steel Pipes Size : 14'' We are Super Duplex Factory Specialized in Duplex 2250 /2507


Product Description


UNS S31803 and UNS S32205 are commonly referred to as Duplex 2205® material, whose “Duplex” name is derived from the mixed microstructure which contains about equal portions of ferrite and austenite. Developed more than 70 years ago in Sweden precisely for the sulfite paper industry where the Duplex’s were used to combat corrosion problems caused by chloride-bearing cooling waters and other aggressive chemical products. Since then there have been advancements in the composition such as the deliberate addition of nitrogen as an alloying agent, which afterwards quickly made Duplex the “workhorse” of stainless steels.


Duplex S31803 and Super Duplex S32750 Performance

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.

Its general capabilities include:


  • Excellent oxidation resistance
  • Outstanding performance in marine/sea water environments
  • Low thermal expansion coefficients
  • High heat conductivity

Chemical Composition Table


UNS: S31803

CMnPSSiCrNiNMo
Min21.04.50.082.5
Max0.03020.0300.0201.0023.06.50.203.5

UNS: S32750

CMnPSSiCrNiNMoCu
Min24.06.00.243.0
Max0.0301.200.0350.0200.8026.08.00.325.00.50

The physical properties of grade 2205 stainless steels are tabulated below. Grade S31803 has similar physical properties to that of S32205.
Physical properties of 2205 grade stainless steels


GradeDensity
(kg/m3)
Elastic
Modulus

(GPa)
Mean Co-eff of Thermal
expansion (μm/m/°C)
Thermal
Conductivity (W/m.K)
Specific
Heat
0-100°C

( J/kg.K)
Electrical
Resistivity
(nΩ.m)
0-100°C0-315°C0-538°Cat 100°Cat 500°C
UNS S3180378219013.714.2-19-418850

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