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SAE-AISI M2 Steel vs. S35140 Stainless Steel

Both SAE-AISI M2 steel and S35140 stainless steel are iron alloys. They have 55% 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 S35140 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
690

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Melting Completion (Liquidus), °C 1610
1420
Melting Onset (Solidus), °C 1570
1370
Specific Heat Capacity, J/kg-K 440
470
Thermal Conductivity, W/m-K 22
14
Thermal Expansion, µm/m-K 10
16

Otherwise Unclassified Properties

Base Metal Price, % relative 24
31
Density, g/cm3 8.4
8.0
Embodied Carbon, kg CO2/kg material 8.8
5.5
Embodied Energy, MJ/kg 130
78
Embodied Water, L/kg 98
190

Common Calculations

PREN (Pitting Resistance) 31
28
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 25 to 71
24
Strength to Weight: Bending, points 22 to 44
22
Thermal Diffusivity, mm2/s 5.9
3.7
Thermal Shock Resistance, points 27 to 76
16

Alloy Composition

Carbon (C), % 0.78 to 1.1
0 to 0.1
Chromium (Cr), % 3.8 to 4.5
20 to 22
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 78.5 to 83.4
44.1 to 52.7
Manganese (Mn), % 0.15 to 0.4
1.0 to 3.0
Molybdenum (Mo), % 4.5 to 5.5
1.0 to 2.0
Nickel (Ni), % 0 to 0.3
25 to 27
Niobium (Nb), % 0
0.25 to 0.75
Nitrogen (N), % 0
0.080 to 0.2
Phosphorus (P), % 0 to 0.030
0 to 0.045
Silicon (Si), % 0.2 to 0.45
0 to 0.75
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