Stainless two-phase duplex acid resistant steel 1.4462, X2CrNiMoN22-5-3 resistant to intergranular and stress corrosion with ferritic-austenitic structure according to EN 10088-1:2007 and EN 10088-3:2007.

 

Standards Steel Grades
Chemical Composition %
C: Mn: Si: P: S: Cr: Mo: Ni: N:
EN 1.4462 - X2CrNiMoN22-5-3
<0.03 <2.0 <1.0 <0.030 <0.02 21.0 - 23.0 2.5 - 3.5 4.5 - 6.5 0.08 - 0.2
AFNOR Z3CND22-05AZ - Z 3 CND 22-05 Az
<0.03 <2.0 <0.75 <0.035 <0.01 21.0 - 23.0 2.5 - 3.5 4.5 - 6.5 0.08 - 0.2
ISO CrNiMo22-5-3 - CrNiMo 22-5-3
<0.03 <2.0 <1.0 <0.030 <0.02 21.0 - 23.0 2.5 - 3.5 4.5 - 6.5 0.08 - 0.2
UNS S31803 - F51
<0.03 <2.0 <1.0 <0.030 <0.02 21.0 - 23.0 2.5 - 3.5 4.5 - 6.5 0.08 - 0.2
UNS S32205 - DUPLEX 2205 - 2205 - A 182 F60
<0.03 <2.0 <1.0 <0.030 <0.02 22.0 - 23.0 3.0 - 3.5 4.5 - 6.5 0.14 - 0.2
GOST 02Ch22N5M3 - 02Х22Н5АМ3
<0.03 <2.0 <1.0 <0.030 <0.02 21.0 - 23.0 2.5 - 3.5 4.5 - 6.5 0.08 - 0.2
BS 318S13 - 318 S 13
<0.03 <2.0 <1.0 <0.025 <0.02 21.0 - 23.0 2.5 - 3.5 4.5 - 6.5 -
ASME SUS 329J3L
<0.03 <2.0 <1.0 <0.040 <0.03 21.0 - 24.0 2.5 - 3.5 4.5 - 6.5 0.08 - 0.2
AVESTA
SHEFFIELD
SAF 2205
<0.03 <2.0 <1.0 <0.030 <0.015 22.0 3.2 5.0 0.18

 

X2CrNiMoN22-5-3, 1.4462 - specification and application

Two-phase duplex steel with a ferritic-austenitic structure resistant to high temperatures, operating in acids and salts NaCl, CaCl2, LiCl2, increased chromium - Cr, Molybdenum - Mo, and Nitrogen - N content, occurring in the supersaturated state at temperatures of 1020 - 1100 ℃ in the form of bars, pipes, sheets and forgings.

Duplex X2CrNiMoN22-5-3steel is characterized by high intercrystalline corrosion resistance, stress corrosion resistance, pitting corrosion resistance, low coefficient of thermal expansion and work temperature up to 200-250 ℃. Compared to ordinary austenitic acid resistant steels, it exhibits much better strength properties and higher wear resistance and erosion resistance.

The above duplex grade depending on the requirements and working environment is used, inter alia, in the chemical, shipbuilding, aviation, cryogenic, paper, mining, petrochemical and power industries.

From this material are made parts and subassemblies such as pumps, coolers, aircraft, bolts, bushes, shafts, valves, tanks and containers for transporting chemical substances on chemical tankers, desalination plant pipes, stirrers, swing arms, off-shore installations, pressure tanks, rotors and fans, petrochemical and processing plants containing chlorides, press rollers, machine parts and equipment used in the papermaking industry.

1.4462 steel exhibits resistance to stress corrosion and cracks in corrosive media such as:

  • Calcium chloride -CaCl2 at a concentration of 40% at 100 ℃
  • Lithium chloride - LiCl2 at a concentration of 33% at 120 ℃
  • Sodium chloride - NaClat a concentration of 25-28% at 155 °C

 


Mechanical properties of duplex steel 1.4462

  • Tensile strength Rm= 650 - 850 MPa
  • Yield point Re= > 450 MPa
  • Elongation, A >25%
  • Modulus of elasticityE = 200 GPa
  • Hardness < 270 HB
  • Heat conductivity λ = 15 W ⋅ m-1 &sdot K-1
  • Heat capacity cp20℃ = 500 J ⋅ kg-1 ⋅ K-1
  • Density 7,8 g/cm3

 


Mechanical properties depending on the operating temperature

Properties Temperatures
100℃ 200℃ 300℃
Modulus of elasticity E 194 GPa 186 GPa 180 GPa
Yield point Re > 360 MPa > 315 MPa -
Linear Expansion Factor α20℃ 13,0 ⋅ 10-6 13,5 ⋅ 10-6 14,0⋅ 10-6

 


VIRGAMET in above the grades provides:

 


List of other designations and equivalents of duplex steel grade 1.4462:

X2CrNiMoN22-5-3, 4462, duplex 2205, Z3CND22-05AZ, Z 3 CND 22-05 AZ, CrNiMo22-5, UNS S31803, S 31803, Grade F51, UNS S32205, S 32205, Grade F60, Duplex 2205, 02Ch22N5M3, 02Х22Н5АМ3, BS 318S13, 318 S 13, SUS 329J3L, SAF 2205, UNS S39205, J92205, CD3MN, 022Cr22Ni5Mo3N, SAF 2205.


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