AISI 409Cb (S40940) Stainless Steel
Ferritic Stainless Steels
Property Overview
Density7.8g/cm³
Elastic Modulus190GPa
Tensile Strength420MPa
Yield Strength200MPa
Brinell HardnessUnknown
Maximum Service Temperature710°C
Chemical Composition
C
0 to 0.060%
CR
10.5 to 11.7%
NI
0 to 0.5%
MN
0 to 1.0%
SI
0 to 1.0%
P
0 to 0.045%
S
0 to 0.040%
NB
0 to 0.75%
FE
84.9 to 89.5%
Mechanical
Elastic (Young's, Tensile) Modulus
190 GPa
Elongation at Break
24 %
Fatigue Strength
140 MPa
Poisson's Ratio
0.28
Shear Modulus
75 GPa
Shear Strength
270 MPa
Tensile Strength: Ultimate (UTS)
420 MPa
Tensile Strength: Yield (Proof)
200 MPa
Physical
Density
7.8 g/cm 3
Thermal
Latent Heat of Fusion
270 J/g
Maximum Temperature: Corrosion
440 °C
Maximum Temperature: Mechanical
710 °C
Melting Completion (Liquidus)
1450 °C
Melting Onset (Solidus)
1410 °C
Specific Heat Capacity
480 J/kg-K
Thermal Conductivity
25 W/m-K
Thermal Diffusivity
6.7 mm 2 /s
Thermal Expansion
10 µm/m-K
Thermal Shock Resistance
15 points
Electrical
Electrical Conductivity: Equal Volume
2.9 % IACS
Electrical Conductivity: Equal Weight (Specific)
3.3 % IACS
Calculated
PREN (Pitting Resistance)
11
Resilience: Ultimate (Unit Rupture Work)
83 MJ/m 3
Resilience: Unit (Modulus of Resilience)
100 kJ/m 3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
15 points
Strength to Weight: Bending
16 points
Environmental
Base Metal Price
8.5 % relative
Embodied Carbon
2.2 kg CO 2 /kg material
Embodied Energy
31 MJ/kg
Embodied Energy
31 MJ/kg 13 x 10 3 BTU/lb
Embodied Water
94 L/kg
Embodied Water
94 L/kg 11 gal/lb
Registered Designations & Aliases
409CbAISI 409CbAISI 409Cb (S40940) Stainless SteelS40940
Standards
ASTM A493 ASTM A493: Standard Specification for Stainless Steel Wire and Wire Rods for Cold Heading and Cold Forging
ASTM A493 ASTM A493: Standard Specification for Stainless Steel Wire and Wire Rods for Cold Heading and Cold Forging Advanced Materials in Automotive Engineering, Jason Rowe (editor), 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