AISI 440A (S44002) Stainless Steel
Martensitic Stainless Steels
annealed
Property Overview
Density7.7g/cm³
Elastic Modulus200GPa
Tensile Strength730MPa
Yield Strength420MPa
Brinell HardnessUnknown
Maximum Service Temperature760°C
Chemical Composition
C
0.6 to 0.75%
CR
16 to 18%
MO
0 to 0.75%
MN
0 to 1.0%
SI
0 to 1.0%
P
0 to 0.040%
S
0 to 0.015%
FE
78.4 to 83.4%
Mechanical
Elastic (Young's, Tensile) Modulus
200 GPa
Elongation at Break
20 %
Fatigue Strength
270 MPa
Poisson's Ratio
0.28
Shear Modulus
77 GPa
Shear Strength
450 MPa
Tensile Strength: Ultimate (UTS)
730 MPa
Tensile Strength: Yield (Proof)
420 MPa
Physical
Density
7.7 g/cm 3
Thermal
Latent Heat of Fusion
280 J/g
Maximum Temperature: Corrosion
400 °C
Maximum Temperature: Mechanical
760 °C
Melting Completion (Liquidus)
1480 °C
Melting Onset (Solidus)
1370 °C
Specific Heat Capacity
480 J/kg-K
Thermal Conductivity
23 W/m-K
Thermal Diffusivity
6.2 mm 2 /s
Thermal Expansion
10 µm/m-K
Thermal Shock Resistance
26 points
Electrical
Electrical Conductivity: Equal Volume
2.5 % IACS
Electrical Conductivity: Equal Weight (Specific)
2.9 % IACS
Calculated
PREN (Pitting Resistance)
18
Resilience: Ultimate (Unit Rupture Work)
120 MJ/m 3
Resilience: Unit (Modulus of Resilience)
440 kJ/m 3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
26 points
Strength to Weight: Bending
23 points
Environmental
Base Metal Price
9.0 % 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
120 L/kg
Embodied Water
120 L/kg 14 gal/lb
Registered Designations & Aliases
440AAISI 440AAISI 440A (S44002) Stainless SteelS44002
Standards
ASTM A276 ASTM A276: Standard Specification for Stainless Steel Bars and Shapes
ASTM A276 ASTM A276: Standard Specification for Stainless Steel Bars and Shapes Creep-Resistant Steels, Fujio Abe et al. (editors), 2008 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