Duplex 2304 is a 23‰ Cr, 4‰ Nickel, Mo free duplex stainless steel (23.04). We hold stock of duplex alloys in plate, flanges, pipes, and bars from our warehouse in the CN. We often meet specialist alloy profiling requirements and are a global supplier. The alloy lean duplex 2304 has similar corrosion resistance properties to 316L. Furthermore, its mechanical properties i.e. yield strength, are twice those of 304/316 austenitic grades. This allows the designer to save weight, particularly for properly designed pressure vessel applications. The alloy is particularly suitable for applications covering the -50°C/+300°C (-58°F/572°F) temperature range. Lower temperatures may also be considered, but need some restrictions, particularly for welded structures. With its duplex microstructure, low nickel and high chromium contents, the alloy has improved stress corrosion resistance properties compared to 304 and 316 austenitic grades. Tensile Strength Properties (Minimum Values)°CRp 0.2 MPaRp 1.0 MPaRm MPa20400440600100330365570200280310530300230260490
°FYS 0.2% KSIYS 1.0% KSI UTS KSIElongation %6858648725212485383253924145772057233387120
Values obtained for hot rolled plates (th ≤ 2”). Duplex 2304 (S32304 1.4362) must not be used for a long time at temperatures higher than 300°C (572°F), where precipitation hardening phenomenon occurs.
Toughness Values (KCV Minimum Values)Temp. -50°C+20°C -60°F+70°FSingle 75 J/cm90 J/cm 54 ft.lbs65 ft. lbsAverage (5) 90 J/cm150 J/cm 65 ft.lbs87 ft.lbs
Hardness (Typical Values)Average (5)HV10 180-230HB : 180-230HRC _ 20
Applications:
Duplex 2304 is generally used in the same applications in which Alloys 304 and 316L are used.
Some examples of these applications include:
Chloride containing environments Welded pipe systems within the Pulp and Paper, Chemical and Petrochemical, and Water Treatment industries Transportations
Heat exchanger tubes
Architecture, building, construction Pressure vessels Caustic solutions, organic acids Food industry
Source: wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)
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