Grade 2304 Duplex Stainless Steel

Grade 2304 Duplex Stainless Steel (China brand: 00 cr23ni4n) was developed by Swedish a duplex stainless  steel, low alloy solid solution treatment temperature of 1000 ℃ or so,
 organization is  40% and 50% - 50% - 50% ferrite austenite, has the common characteristics of duplex  stainless steel, is a has the characteristics of high strength and low price,  can take the place of 304 l and 316 l austenitic stainless steel is commonly  used and the development of steel grades.

It has been  identified by the American mechanical engineering association (ASME) as a  conduit for boilers and pressure vessels, chemical plants and refineries, and a  number of countries have incorporated standards.

Product Description

2304 Stainless Steel Characteristics:

Corrosion Resistance
 The PRE value of  SAF2304 dual-phase stainless steel is 25, which is equivalent to 316L stainless  steel.
 When we tested  the relationship between the critical hole erosion temperature (CPT) and  chloride ion content of several steel in NaCl solution under 300mV potential,  the CPT value of ASF2304 two-phase stainless steel was found to be higher than  304L,
 Which is  equivalent to 316L.In neutral chloride solution for autoclave test results of  several steel found that applied stress is equivalent to the temperature of  steel yield strength, 1000 h, the test time curve for not happen under the area  of stress corrosion cracking.
 In addition, the  corrosion resistance of SAF2304 dual-phase steel is good, and can be tested by  CuSO4+H2SO4 copper chip.SAF2304 dual phase steel has good corrosion resistance  in nitric acid, can be comparable to 304 l, in other acid, such as sulfuric  acid, with 316 l, its corrosion resistance in organic acids, such as formic  acid, even better than 316 l.

Welding Property
 SAF 2304  stainless steel has good welding properties. No heat treatment is required  before welding. SMAW,GTAW,GMAW and SAW are suitable for welding. When the GTAW  method is used for welding, it is necessary to fill in the silk and use pure  argon or Ar+2%N2 to protect the gas.

Processability
 Thermoforming  molding: temperature range 1100-950 ℃, forming after quenching treatment.
 The cold  forming: process is the same as austenitic stainless steel, and the deformation  is difficult. After reaching the yield limit, the deformation is the same as  the austenitic stainless steel. SAF 2304 double phase stainless steel deep  drawing, cold spinning and other shaping is more difficult than austenitic  stainless steel.
 Heat Treatment:  solid solution treatment temperature of 950-1050 ℃, fast cooling. Eliminating stress annealing temperature is 550-600 ℃.

Product Application

2304 Stainless Steel Application：

SAF 2304  stainless steel has good mechanical and physical properties, stress corrosion  and other corrosion forms and good weldability, so it may be replaced by  304,304L,316 316L and other austenitic stainless steel.

 Can be used in the manufacture of amine  recycling equipment, hydrocarbons fermentation equipment, etc., in addition,  also can be used for heat exchanger of manufacturing industry, pulp and paper  industry of digester preheater and hot and humid, offshore train seat frame and  so on.

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