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SAE-AISI M42 Steel vs. N08031 Stainless Steel

Both SAE-AISI M42 steel and N08031 stainless steel are iron alloys. They have 44% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M42 steel and the bottom bar is N08031 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 78
81
Tensile Strength: Ultimate (UTS), MPa 810 to 2310
730

Thermal Properties

Latent Heat of Fusion, J/g 270
310
Melting Completion (Liquidus), °C 1540
1440
Melting Onset (Solidus), °C 1490
1390
Specific Heat Capacity, J/kg-K 450
460
Thermal Conductivity, W/m-K 20
12
Thermal Expansion, µm/m-K 12
18

Otherwise Unclassified Properties

Base Metal Price, % relative 30
39
Density, g/cm3 8.2
8.1
Embodied Carbon, kg CO2/kg material 7.4
7.1
Embodied Energy, MJ/kg 100
96
Embodied Water, L/kg 140
240

Common Calculations

PREN (Pitting Resistance) 38
52
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 28 to 79
25
Strength to Weight: Bending, points 24 to 48
22
Thermal Diffusivity, mm2/s 5.4
3.1
Thermal Shock Resistance, points 25 to 71
14

Alloy Composition

Carbon (C), % 1.1 to 1.2
0 to 0.015
Chromium (Cr), % 3.5 to 4.3
26 to 28
Cobalt (Co), % 7.8 to 8.8
0
Copper (Cu), % 0 to 0.25
1.0 to 1.4
Iron (Fe), % 76.3 to 81
29 to 36.9
Manganese (Mn), % 0.15 to 0.4
0 to 2.0
Molybdenum (Mo), % 9.0 to 10
6.0 to 7.0
Nickel (Ni), % 0 to 0.3
30 to 32
Nitrogen (N), % 0
0.15 to 0.25
Phosphorus (P), % 0 to 0.030
0 to 0.020
Silicon (Si), % 0.15 to 0.65
0 to 0.3
Sulfur (S), % 0 to 0.030
0 to 0.010
Tungsten (W), % 1.2 to 1.9
0
Vanadium (V), % 1.0 to 1.4
0