S31803 (1.4462) and S32205 Duplex Steel

  • S31803

Duplex UNS S31803 / UNS S32205 | 1.4462

  • Good weldability in thick plates.
  • Good low temperature toughness.
  • Resistance to stress corrosion cracking of importance in many applications including hot water tanks, process plant, brewing tanks, and desalination plant.
  • Higher strength which is around twice that of Type 304 austenitic stainless steel. This leads to reduced plate thicknesses being used in fabrications reducing the weight which is of particular significance in items such as pressure vessels, storage tanks, and structural applications such as bridges.

Grades

TypeGradeEN Steel NumberUNS
Duplex S31803 1.4462 S32205/2205

Properties

Chemical Analysis (% max or range)   
C Mn P S  Si  Cr  Ni  Mo  N 
0.03 2.00 0.03 0.02  1.00  21.0-23.0  4.5-6.5  2.5-3.5  0.08-0.20            

Mechanical

Tensile  Yield  Elongation  Hardness 
MPa min  MPa min  % min   Brinell max 
620  450  25  293

Specifications

Thickness (mm)Plate Sizes (mm)
12000 x 2000     
12000 x 2000  12000 x 2500 12000 x 3000 
12000 x 2000  12000 x 2500 12000 x 3000 
10 12000 x 2000  12000 x 2500 12000 x 3000 
12 12000 x 2000  12000 x 2500 12000 x 3000
15 12000 x 2000  12000 x 2500 12000 x 3000 
20  12000 x 2000  12000 x 2500 12000 x 3000 
25 12000 x 2000  12000 x 2500 12000 x 3000
30  6000 x 2000 5000 x 2500  
35  6000 x 2000 5000 x 2500  
40  6000 x 2000 5000 x 2500  
45  6000 x 2000 5000 x 2500  
50  6000 x 2000 5000 x 2500