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SAE-AISI 1084 Steel vs. S82031 Stainless Steel

Both SAE-AISI 1084 steel and S82031 stainless steel are iron alloys. They have 74% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 1084 steel and the bottom bar is S82031 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11
39
Fatigue Strength, MPa 320 to 370
490
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
78
Shear Strength, MPa 470 to 550
540
Tensile Strength: Ultimate (UTS), MPa 780 to 930
780
Tensile Strength: Yield (Proof), MPa 510 to 600
570

Thermal Properties

Latent Heat of Fusion, J/g 240
290
Maximum Temperature: Mechanical, °C 400
980
Melting Completion (Liquidus), °C 1450
1430
Melting Onset (Solidus), °C 1410
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 51
15
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
13
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.4
2.8
Embodied Energy, MJ/kg 19
39
Embodied Water, L/kg 46
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 81 to 89
280
Resilience: Unit (Modulus of Resilience), kJ/m3 700 to 960
820
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 28 to 33
28
Strength to Weight: Bending, points 24 to 27
24
Thermal Diffusivity, mm2/s 14
3.9
Thermal Shock Resistance, points 25 to 30
22

Alloy Composition

Carbon (C), % 0.8 to 0.93
0 to 0.050
Chromium (Cr), % 0
19 to 22
Copper (Cu), % 0
0 to 1.0
Iron (Fe), % 98.1 to 98.6
68 to 78.3
Manganese (Mn), % 0.6 to 0.9
0 to 2.5
Molybdenum (Mo), % 0
0.6 to 1.4
Nickel (Ni), % 0
2.0 to 4.0
Nitrogen (N), % 0
0.14 to 0.24
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0
0 to 0.8
Sulfur (S), % 0 to 0.050
0 to 0.0050