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SAE-AISI M42 Steel vs. N08020 Stainless Steel

Both SAE-AISI M42 steel and N08020 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 (10, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M42 steel and the bottom bar is N08020 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 78
77
Tensile Strength: Ultimate (UTS), MPa 810 to 2310
610 to 620

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Melting Completion (Liquidus), °C 1540
1410
Melting Onset (Solidus), °C 1490
1360
Specific Heat Capacity, J/kg-K 450
460
Thermal Conductivity, W/m-K 20
12
Thermal Expansion, µm/m-K 12
15

Otherwise Unclassified Properties

Base Metal Price, % relative 30
38
Density, g/cm3 8.2
8.2
Embodied Carbon, kg CO2/kg material 7.4
6.6
Embodied Energy, MJ/kg 100
92
Embodied Water, L/kg 140
220

Common Calculations

PREN (Pitting Resistance) 38
28
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 28 to 79
21
Strength to Weight: Bending, points 24 to 48
20
Thermal Diffusivity, mm2/s 5.4
3.2
Thermal Shock Resistance, points 25 to 71
15

Alloy Composition

Carbon (C), % 1.1 to 1.2
0 to 0.070
Chromium (Cr), % 3.5 to 4.3
19 to 21
Cobalt (Co), % 7.8 to 8.8
0
Copper (Cu), % 0 to 0.25
3.0 to 4.0
Iron (Fe), % 76.3 to 81
29.9 to 44
Manganese (Mn), % 0.15 to 0.4
0 to 2.0
Molybdenum (Mo), % 9.0 to 10
2.0 to 3.0
Nickel (Ni), % 0 to 0.3
32 to 38
Niobium (Nb), % 0
0 to 1.0
Phosphorus (P), % 0 to 0.030
0 to 0.045
Silicon (Si), % 0.15 to 0.65
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.035
Tungsten (W), % 1.2 to 1.9
0
Vanadium (V), % 1.0 to 1.4
0

Comparable Variants