Twitter

EnglishFrenchGermanItalianPortugueseSpanish

Duplex Steel



We offer high quality Duplex Steel which is made using sturdy alloys. Our Duplex Steel is highly demanded because of various exceptional attributes. We supply Duplex Steel which is durable, corrosion and temperature resistant and has low thermal expansion. Our Duplex Steel is used in various industries and available at competitive prices.


Applications
  • Pressure vessels, tanks, piping, and heat exchangers in the chemcal processing industry
  • Piping, tubing, and heat exchangers for the handling of gas and oil
  • Effluent scrubbing systems
  • Pulp and paper industry digesters, bleaching equipment, and stock-handling systems
  • Rotors, fans, shafts, and press rolls requiring combined strength and corrosion resistance
  • Cargo tanks for ships and trucks
  • Food processing equipment
  • Biofuels plants

Standards
  • ASTM/ASME : A240 UNS S32205/ S31803
  • EURONORM : 1.4462 X2CrNiMoN 22.5.3
  • AFNOR : Z3 CrNi 22.05 AZ
  • DIN : W. Nr 1.4462

General Corrosion in Wet Process Phosphoric Acids

Corrosion Rate, ipy
Geade
Solution A 140oF
Solution B, 120oF
2205
3.1
3.9
316L
>200
>200
940L
47
6.3
Composition, wt %
P2O5HCLHFH2SO4Fe2O3Al2O3SiO2CaOMgO
Sol A 54.00.061.14.10.270.170.100.200.70
Sol B 27.50.341.31.720.40.010.30.02-


Stress Corrosion Cracking Resistance

GradeBoiling 42% MgCl2Wick TestBoiling 25% Nacl
2205FPP
254 SMO®FPP
Type 316LFFF
Type 317LFFF
Alloy 904LFP or FP or F
Alloy 20FPP


Chemical Analysis Typical Values (Weight %)

CCrNiMoNOthers
0.02022.15.63.10.18S = 0.0001

Note : PREN = [Cr %] + 3.3 [Mo %] + 16 [N %] ≥ 34.

Mechanical Properties at Room Temperature
ASTM A 240Typical
Yield Strength (0.2%), ksi65 min.74
Tensile Strength, ksi90 min.105
Elongation, %25 min.30
Hardness HB293 max.256


Tensile Properties at Elevated Temperatures

Temperature oF 122 212 392 572
Yield Strength (0.2%), ksi 60 52 45 41
Tensile Strength, ksi 96 90 83 81

Physical Properties

Temperature oF ASTM A 240 68 212 392 572
Density Ib/in2 0.278 - - -
Modulus of Elasticity psi x 106 27.6 26.1 25.4 27.9
Linear Expansion (68oF-T) 10-6/1oF - 7.5 7.8 8.1
Thermal Conductivity Btu/h hoF 8.7 9.2 9.8 10.4
Heat Capacity Btu/h IboF 0.112 0.119 0.127 0.134
Electrical Resistivity Ωin x 10-6 33.5 35.4 37.4 39.4