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SAE-AISI M2 Steel vs. S82122 Stainless Steel

Both SAE-AISI M2 steel and S82122 stainless steel are iron alloys. They have 78% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M2 steel and the bottom bar is S82122 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 77
78
Tensile Strength: Ultimate (UTS), MPa 760 to 2150
680

Thermal Properties

Latent Heat of Fusion, J/g 260
290
Melting Completion (Liquidus), °C 1610
1420
Melting Onset (Solidus), °C 1570
1380
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 22
15
Thermal Expansion, µm/m-K 10
13

Otherwise Unclassified Properties

Base Metal Price, % relative 24
12
Density, g/cm3 8.4
7.7
Embodied Carbon, kg CO2/kg material 8.8
2.6
Embodied Energy, MJ/kg 130
37
Embodied Water, L/kg 98
150

Common Calculations

PREN (Pitting Resistance) 31
25
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 25 to 71
25
Strength to Weight: Bending, points 22 to 44
22
Thermal Diffusivity, mm2/s 5.9
4.0
Thermal Shock Resistance, points 27 to 76
19

Alloy Composition

Carbon (C), % 0.78 to 1.1
0 to 0.030
Chromium (Cr), % 3.8 to 4.5
20.5 to 21.5
Copper (Cu), % 0 to 0.25
0.5 to 1.5
Iron (Fe), % 78.5 to 83.4
68.9 to 75.4
Manganese (Mn), % 0.15 to 0.4
2.0 to 4.0
Molybdenum (Mo), % 4.5 to 5.5
0 to 0.6
Nickel (Ni), % 0 to 0.3
1.5 to 2.5
Nitrogen (N), % 0
0.15 to 0.2
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.2 to 0.45
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.020
Tungsten (W), % 5.5 to 6.8
0
Vanadium (V), % 1.8 to 2.2
0