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SAE-AISI M2 Steel vs. SAE-AISI S2 Steel

Both SAE-AISI M2 steel and SAE-AISI S2 steel are iron alloys. They have 83% of their average alloy composition in common. There are 21 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 SAE-AISI M2 steel and the bottom bar is SAE-AISI S2 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 77
72
Tensile Strength: Ultimate (UTS), MPa 760 to 2150
670 to 1940

Thermal Properties

Latent Heat of Fusion, J/g 260
260
Melting Completion (Liquidus), °C 1610
1450
Melting Onset (Solidus), °C 1570
1410
Specific Heat Capacity, J/kg-K 440
470
Thermal Conductivity, W/m-K 22
44
Thermal Expansion, µm/m-K 10
11

Otherwise Unclassified Properties

Base Metal Price, % relative 24
2.6
Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 8.8
2.1
Embodied Energy, MJ/kg 130
30
Embodied Water, L/kg 98
49

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 25 to 71
24 to 69
Strength to Weight: Bending, points 22 to 44
22 to 44
Thermal Diffusivity, mm2/s 5.9
12
Thermal Shock Resistance, points 27 to 76
23 to 68

Alloy Composition

Carbon (C), % 0.78 to 1.1
0.4 to 0.55
Chromium (Cr), % 3.8 to 4.5
0
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 78.5 to 83.4
96 to 98.1
Manganese (Mn), % 0.15 to 0.4
0.3 to 0.5
Molybdenum (Mo), % 4.5 to 5.5
0.3 to 0.6
Nickel (Ni), % 0 to 0.3
0 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.2 to 0.45
0.9 to 1.2
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 5.5 to 6.8
0
Vanadium (V), % 1.8 to 2.2
0 to 0.5

Comparable Variants