AISI 444 (S44400) Stainless Steel
Ferritic Stainless Steels
Property Overview
Density7.7g/cm³
Elastic Modulus200GPa
Tensile Strength470MPa
Yield Strength310MPa
Brinell Hardness190HB
Maximum Service Temperature930°C
Chemical Composition
C
0 to 0.025%
CR
17.5 to 19.5%
NI
0 to 1.0%
MO
1.8 to 2.5%
MN
0 to 1.0%
SI
0 to 1.0%
N
0 to 0.035%
P
0 to 0.040%
S
0 to 0.030%
NB
0.2 to 0.8%
TI
0.2 to 0.8%
FE
73.3 to 80.8%
Mechanical
Elastic (Young's, Tensile) Modulus
200 GPa
Elongation at Break
23 %
Fatigue Strength
210 MPa
Poisson's Ratio
0.28
Shear Modulus
78 GPa
Shear Strength
300 MPa
Tensile Strength: Ultimate (UTS)
470 MPa
Tensile Strength: Yield (Proof)
310 MPa
Hardness
Brinell Hardness
190
Rockwell B Hardness
83
Physical
Density
7.7 g/cm 3
Thermal
Latent Heat of Fusion
290 J/g
Maximum Temperature: Corrosion
580 °C
Maximum Temperature: Mechanical
930 °C
Melting Completion (Liquidus)
1460 °C
Melting Onset (Solidus)
1420 °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
16 points
Electrical
Electrical Conductivity: Equal Volume
2.2 % IACS
Electrical Conductivity: Equal Weight (Specific)
2.5 % IACS
Calculated
PREN (Pitting Resistance)
26
Resilience: Ultimate (Unit Rupture Work)
95 MJ/m 3
Resilience: Unit (Modulus of Resilience)
240 kJ/m 3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
17 points
Strength to Weight: Bending
17 points
Environmental
Base Metal Price
15 % relative
Embodied Carbon
3.4 kg CO 2 /kg material
Embodied Energy
47 MJ/kg
Embodied Energy
47 MJ/kg 20 x 10 3 BTU/lb
Embodied Water
130 L/kg
Embodied Water
130 L/kg 16 gal/lb
Registered Designations & Aliases
444AISI 444AISI 444 (S44400) Stainless SteelS44400
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 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