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SAE-AISI M50 Steel vs. S20161 Stainless Steel

Both SAE-AISI M50 steel and S20161 stainless steel are iron alloys. They have 75% of their average alloy composition in common. There are 24 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 M50 steel and the bottom bar is S20161 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 75
76
Tensile Strength: Ultimate (UTS), MPa 720 to 2250
980

Thermal Properties

Latent Heat of Fusion, J/g 260
330
Melting Completion (Liquidus), °C 1480
1380
Melting Onset (Solidus), °C 1440
1330
Specific Heat Capacity, J/kg-K 470
490
Thermal Conductivity, W/m-K 35
15
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.7
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 10
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
12
Density, g/cm3 7.9
7.5
Embodied Carbon, kg CO2/kg material 5.1
2.7
Embodied Energy, MJ/kg 74
39
Embodied Water, L/kg 83
130

Common Calculations

PREN (Pitting Resistance) 19
19
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
26
Strength to Weight: Axial, points 26 to 80
36
Strength to Weight: Bending, points 23 to 49
29
Thermal Diffusivity, mm2/s 9.7
4.0
Thermal Shock Resistance, points 21 to 66
22

Alloy Composition

Carbon (C), % 0.78 to 0.88
0 to 0.15
Chromium (Cr), % 3.8 to 4.5
15 to 18
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 87 to 90.4
65.6 to 73.9
Manganese (Mn), % 0.15 to 0.45
4.0 to 6.0
Molybdenum (Mo), % 3.9 to 4.8
0
Nickel (Ni), % 0 to 0.3
4.0 to 6.0
Nitrogen (N), % 0
0.080 to 0.2
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.2 to 0.6
3.0 to 4.0
Sulfur (S), % 0 to 0.030
0 to 0.040
Vanadium (V), % 0.8 to 1.3
0