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S44800 Stainless Steel vs. SAE-AISI 1040 Steel

Both S44800 stainless steel and SAE-AISI 1040 steel are iron alloys. They have 65% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is S44800 stainless steel and the bottom bar is SAE-AISI 1040 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
160 to 180
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 23
13 to 20
Fatigue Strength, MPa 300
220 to 340
Poisson's Ratio 0.27
0.29
Reduction in Area, % 45
40 to 45
Shear Modulus, GPa 82
73
Shear Strength, MPa 370
350 to 390
Tensile Strength: Ultimate (UTS), MPa 590
570 to 640
Tensile Strength: Yield (Proof), MPa 450
320 to 530

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
400
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 17
51
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 19
1.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.8
1.4
Embodied Energy, MJ/kg 52
18
Embodied Water, L/kg 190
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
79 to 96
Resilience: Unit (Modulus of Resilience), kJ/m3 480
270 to 760
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21
20 to 23
Strength to Weight: Bending, points 20
19 to 21
Thermal Diffusivity, mm2/s 4.6
14
Thermal Shock Resistance, points 19
18 to 20

Alloy Composition

Carbon (C), % 0 to 0.010
0.37 to 0.44
Chromium (Cr), % 28 to 30
0
Copper (Cu), % 0 to 0.15
0
Iron (Fe), % 62.6 to 66.5
98.6 to 99.03
Manganese (Mn), % 0 to 0.3
0.6 to 0.9
Molybdenum (Mo), % 3.5 to 4.2
0
Nickel (Ni), % 2.0 to 2.5
0
Nitrogen (N), % 0 to 0.020
0
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.2
0
Sulfur (S), % 0 to 0.020
0 to 0.050