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SAE-AISI M42 Steel vs. N08811 Stainless Steel

Both SAE-AISI M42 steel and N08811 stainless steel are iron alloys. They have 50% of their average alloy composition in common. There are 22 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 M42 steel and the bottom bar is N08811 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
510

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Melting Completion (Liquidus), °C 1540
1390
Melting Onset (Solidus), °C 1490
1360
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 20
12
Thermal Expansion, µm/m-K 12
14

Otherwise Unclassified Properties

Base Metal Price, % relative 30
30
Density, g/cm3 8.2
8.0
Embodied Carbon, kg CO2/kg material 7.4
5.3
Embodied Energy, MJ/kg 100
76
Embodied Water, L/kg 140
200

Common Calculations

PREN (Pitting Resistance) 38
21
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 28 to 79
18
Strength to Weight: Bending, points 24 to 48
18
Thermal Diffusivity, mm2/s 5.4
3.0
Thermal Shock Resistance, points 25 to 71
13

Alloy Composition

Aluminum (Al), % 0
0.15 to 0.6
Carbon (C), % 1.1 to 1.2
0.060 to 0.1
Chromium (Cr), % 3.5 to 4.3
19 to 23
Cobalt (Co), % 7.8 to 8.8
0
Copper (Cu), % 0 to 0.25
0 to 0.75
Iron (Fe), % 76.3 to 81
39.5 to 50.6
Manganese (Mn), % 0.15 to 0.4
0 to 1.5
Molybdenum (Mo), % 9.0 to 10
0
Nickel (Ni), % 0 to 0.3
30 to 35
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.15 to 0.65
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015
Titanium (Ti), % 0
0.15 to 0.6
Tungsten (W), % 1.2 to 1.9
0
Vanadium (V), % 1.0 to 1.4
0