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SAE-AISI M33 Steel vs. S82031 Stainless Steel

Both SAE-AISI M33 steel and S82031 stainless steel are iron alloys. They have 79% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M33 steel and the bottom bar is S82031 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 78
78
Tensile Strength: Ultimate (UTS), MPa 810 to 2210
780

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Melting Completion (Liquidus), °C 1550
1430
Melting Onset (Solidus), °C 1500
1390
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 20
15
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 32
13
Density, g/cm3 8.2
7.7
Embodied Carbon, kg CO2/kg material 7.7
2.8
Embodied Energy, MJ/kg 110
39
Embodied Water, L/kg 150
150

Common Calculations

PREN (Pitting Resistance) 38
27
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 27 to 75
28
Strength to Weight: Bending, points 24 to 46
24
Thermal Diffusivity, mm2/s 5.5
3.9
Thermal Shock Resistance, points 25 to 68
22

Alloy Composition

Carbon (C), % 0.85 to 0.92
0 to 0.050
Chromium (Cr), % 3.5 to 4.0
19 to 22
Cobalt (Co), % 7.8 to 8.8
0
Copper (Cu), % 0 to 0.25
0 to 1.0
Iron (Fe), % 71.4 to 76.3
68 to 78.3
Manganese (Mn), % 0.15 to 0.4
0 to 2.5
Molybdenum (Mo), % 9.0 to 10
0.6 to 1.4
Nickel (Ni), % 0 to 0.3
2.0 to 4.0
Nitrogen (N), % 0
0.14 to 0.24
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.15 to 0.5
0 to 0.8
Sulfur (S), % 0 to 0.030
0 to 0.0050
Tungsten (W), % 1.3 to 2.1
0
Vanadium (V), % 1.0 to 1.4
0