UNS S43940 Stainless Steel
Ferritic Stainless Steels
Property Overview
Density7.7g/cm³
Elastic Modulus200GPa
Tensile Strength490MPa
Yield Strength280MPa
Brinell Hardness160HB
Maximum Service Temperature890°C
Chemical Composition
C
0 to 0.030%
CR
17.5 to 18.5%
MN
0 to 1.0%
SI
0 to 1.0%
P
0 to 0.040%
S
0 to 0.015%
NB
0.3 to 0.6%
TI
0.1 to 0.6%
FE
78.2 to 82.1%
Mechanical
Elastic (Young's, Tensile) Modulus
200 GPa
Elongation at Break
21 %
Fatigue Strength
180 MPa
Poisson's Ratio
0.28
Shear Modulus
77 GPa
Shear Strength
310 MPa
Tensile Strength: Ultimate (UTS)
490 MPa
Tensile Strength: Yield (Proof)
280 MPa
Hardness
Brinell Hardness
160
Rockwell B Hardness
76
Physical
Density
7.7 g/cm 3
Thermal
Latent Heat of Fusion
280 J/g
Maximum Temperature: Corrosion
540 °C
Maximum Temperature: Mechanical
890 °C
Melting Completion (Liquidus)
1440 °C
Melting Onset (Solidus)
1400 °C
Specific Heat Capacity
480 J/kg-K
Thermal Conductivity
25 W/m-K
Thermal Diffusivity
6.8 mm 2 /s
Thermal Expansion
10 µm/m-K
Thermal Shock Resistance
18 points
Electrical
Electrical Conductivity: Equal Volume
2.9 % IACS
Electrical Conductivity: Equal Weight (Specific)
3.4 % IACS
Calculated
PREN (Pitting Resistance)
18
Resilience: Ultimate (Unit Rupture Work)
86 MJ/m 3
Resilience: Unit (Modulus of Resilience)
200 kJ/m 3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
18 points
Strength to Weight: Bending
18 points
Environmental
Base Metal Price
12 % relative
Embodied Carbon
2.6 kg CO 2 /kg material
Embodied Energy
38 MJ/kg
Embodied Energy
38 MJ/kg 16 x 10 3 BTU/lb
Embodied Water
120 L/kg
Embodied Water
120 L/kg 15 gal/lb
Registered Designations & Aliases
S43940UNS S43940 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 ASTM A959: Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels Corrosion of Stainless Steels, A. John Sedriks, 1996
ASTM A959 ASTM A959: Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels