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SAE-AISI M42 Steel vs. S20161 Stainless Steel

Both SAE-AISI M42 steel and S20161 stainless steel are iron alloys. They have 75% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M42 steel and the bottom bar is S20161 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 78
76
Tensile Strength: Ultimate (UTS), MPa 810 to 2310
980

Thermal Properties

Latent Heat of Fusion, J/g 270
330
Melting Completion (Liquidus), °C 1540
1380
Melting Onset (Solidus), °C 1490
1330
Specific Heat Capacity, J/kg-K 450
490
Thermal Conductivity, W/m-K 20
15
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 30
12
Density, g/cm3 8.2
7.5
Embodied Carbon, kg CO2/kg material 7.4
2.7
Embodied Energy, MJ/kg 100
39
Embodied Water, L/kg 140
130

Common Calculations

PREN (Pitting Resistance) 38
19
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
26
Strength to Weight: Axial, points 28 to 79
36
Strength to Weight: Bending, points 24 to 48
29
Thermal Diffusivity, mm2/s 5.4
4.0
Thermal Shock Resistance, points 25 to 71
22

Alloy Composition

Carbon (C), % 1.1 to 1.2
0 to 0.15
Chromium (Cr), % 3.5 to 4.3
15 to 18
Cobalt (Co), % 7.8 to 8.8
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 76.3 to 81
65.6 to 73.9
Manganese (Mn), % 0.15 to 0.4
4.0 to 6.0
Molybdenum (Mo), % 9.0 to 10
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), % 0.15 to 0.65
3.0 to 4.0
Sulfur (S), % 0 to 0.030
0 to 0.040
Tungsten (W), % 1.2 to 1.9
0
Vanadium (V), % 1.0 to 1.4
0