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SAE-AISI M4 Steel vs. N08020 Stainless Steel

Both SAE-AISI M4 steel and N08020 stainless steel are iron alloys. They have 45% 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 M4 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 76
77
Tensile Strength: Ultimate (UTS), MPa 770 to 2150
610 to 620

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Melting Completion (Liquidus), °C 1610
1410
Melting Onset (Solidus), °C 1560
1360
Specific Heat Capacity, J/kg-K 440
460
Thermal Conductivity, W/m-K 25
12
Thermal Expansion, µm/m-K 12
15

Otherwise Unclassified Properties

Base Metal Price, % relative 25
38
Density, g/cm3 8.3
8.2
Embodied Carbon, kg CO2/kg material 14
6.6
Embodied Energy, MJ/kg 210
92
Embodied Water, L/kg 110
220

Common Calculations

PREN (Pitting Resistance) 30
28
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 26 to 72
21
Strength to Weight: Bending, points 23 to 45
20
Thermal Diffusivity, mm2/s 6.9
3.2
Thermal Shock Resistance, points 24 to 68
15

Alloy Composition

Carbon (C), % 1.3 to 1.4
0 to 0.070
Chromium (Cr), % 3.8 to 4.8
19 to 21
Copper (Cu), % 0 to 0.25
3.0 to 4.0
Iron (Fe), % 75.9 to 81.4
29.9 to 44
Manganese (Mn), % 0.15 to 0.4
0 to 2.0
Molybdenum (Mo), % 4.3 to 5.5
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), % 0.2 to 0.45
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.035
Tungsten (W), % 5.3 to 6.5
0
Vanadium (V), % 3.8 to 4.5
0

Comparable Variants