UNS S31803 Stainless Steel
Duplex Stainless Steels
Property Overview
Density7.8g/cm³
Elastic Modulus200GPa
Tensile Strength710MPa
Yield Strength500MPa
Brinell Hardness260HB
Maximum Service Temperature1060°C
Chemical Composition
C
0 to 0.030%
CR
21 to 23%
NI
4.5 to 6.5%
MO
2.5 to 3.5%
MN
0 to 2.0%
SI
0 to 1.0%
N
0.080 to 0.2%
P
0 to 0.030%
S
0 to 0.020%
FE
63.7 to 71.9%
Mechanical
Elastic (Young's, Tensile) Modulus
200 GPa
Elongation at Break
29 %
Fatigue Strength
370 MPa
Poisson's Ratio
0.27
Reduction in Area
50 %
Shear Modulus
80 GPa
Shear Strength
460 MPa
Tensile Strength: Ultimate (UTS)
710 MPa
Tensile Strength: Yield (Proof)
500 MPa
Hardness
Brinell Hardness
260
Rockwell C Hardness
27
Physical
Density
7.8 g/cm 3
Thermal
Latent Heat of Fusion
300 J/g
Maximum Temperature: Corrosion
430 °C
Maximum Temperature: Mechanical
1060 °C
Melting Completion (Liquidus)
1450 °C
Melting Onset (Solidus)
1400 °C
Specific Heat Capacity
480 J/kg-K
Thermal Conductivity
16 W/m-K
Thermal Diffusivity
4.3 mm 2 /s
Thermal Expansion
13 µm/m-K
Thermal Shock Resistance
20 points
Electrical
Electrical Conductivity: Equal Volume
2.2 % IACS
Electrical Conductivity: Equal Weight (Specific)
2.5 % IACS
Calculated
PREN (Pitting Resistance)
34
Resilience: Ultimate (Unit Rupture Work)
180 MJ/m 3
Resilience: Unit (Modulus of Resilience)
630 kJ/m 3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
25 points
Strength to Weight: Bending
23 points
Environmental
Base Metal Price
17 % relative
Embodied Carbon
3.6 kg CO 2 /kg material
Embodied Energy
49 MJ/kg
Embodied Energy
49 MJ/kg 21 x 10 3 BTU/lb
Embodied Water
160 L/kg
Embodied Water
160 L/kg 19 gal/lb
Registered Designations & Aliases
S31803UNS S31803 Stainless Steel
Standards
ASTM A182 ASTM A182: Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service
ASTM A240 ASTM A240: Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
ASTM A479 ASTM A479: Standard Specification for Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels