UNS S20431 Stainless Steel
Austenitic & General Stainless Steels
Property Overview
Density7.7g/cm³
Elastic Modulus200GPa
Tensile Strength710MPa
Yield Strength350MPa
Brinell Hardness210HB
Maximum Service Temperature890°C
Chemical Composition
C
0 to 0.12%
CR
17 to 18%
NI
2.0 to 4.0%
MN
5.0 to 7.0%
SI
0 to 1.0%
N
0.1 to 0.25%
P
0 to 0.045%
S
0 to 0.030%
CU
1.5 to 3.5%
FE
66.1 to 74.4%
Mechanical
Elastic (Young's, Tensile) Modulus
200 GPa
Elongation at Break
46 %
Fatigue Strength
320 MPa
Poisson's Ratio
0.28
Shear Modulus
76 GPa
Shear Strength
500 MPa
Tensile Strength: Ultimate (UTS)
710 MPa
Tensile Strength: Yield (Proof)
350 MPa
Hardness
Brinell Hardness
210
Rockwell B Hardness
86
Physical
Density
7.7 g/cm 3
Thermal
Latent Heat of Fusion
280 J/g
Maximum Temperature: Corrosion
410 °C
Maximum Temperature: Mechanical
890 °C
Melting Completion (Liquidus)
1400 °C
Melting Onset (Solidus)
1360 °C
Specific Heat Capacity
480 J/kg-K
Thermal Conductivity
15 W/m-K
Thermal Diffusivity
4.0 mm 2 /s
Thermal Expansion
17 µm/m-K
Thermal Shock Resistance
15 points
Electrical
Electrical Conductivity: Equal Volume
2.4 % IACS
Electrical Conductivity: Equal Weight (Specific)
2.8 % IACS
Calculated
PREN (Pitting Resistance)
20
Resilience: Ultimate (Unit Rupture Work)
270 MJ/m 3
Resilience: Unit (Modulus of Resilience)
310 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
12 % relative
Embodied Carbon
2.5 kg CO 2 /kg material
Embodied Energy
36 MJ/kg
Embodied Energy
36 MJ/kg 16 x 10 3 BTU/lb
Embodied Water
140 L/kg
Embodied Water
140 L/kg 17 gal/lb
Registered Designations & Aliases
S20431UNS S20431 Stainless Steel
Standards
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 A240 ASTM A240: Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications Welding Metallurgy of Stainless Steels, Erich Folkhard et al., 2012