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SAE-AISI M4 Steel vs. N06985 Nickel

SAE-AISI M4 steel belongs to the iron alloys classification, while N06985 nickel belongs to the nickel alloys. They have a modest 30% of their average alloy composition in common, which, by itself, doesn't mean much. There are 21 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 N06985 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 76
80
Tensile Strength: Ultimate (UTS), MPa 770 to 2150
690

Thermal Properties

Latent Heat of Fusion, J/g 260
320
Melting Completion (Liquidus), °C 1610
1350
Melting Onset (Solidus), °C 1560
1260
Specific Heat Capacity, J/kg-K 440
450
Thermal Conductivity, W/m-K 25
10
Thermal Expansion, µm/m-K 12
15

Otherwise Unclassified Properties

Base Metal Price, % relative 25
55
Density, g/cm3 8.3
8.4
Embodied Carbon, kg CO2/kg material 14
8.8
Embodied Energy, MJ/kg 210
120
Embodied Water, L/kg 110
270

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
23
Strength to Weight: Axial, points 26 to 72
23
Strength to Weight: Bending, points 23 to 45
21
Thermal Diffusivity, mm2/s 6.9
2.6
Thermal Shock Resistance, points 24 to 68
16

Alloy Composition

Carbon (C), % 1.3 to 1.4
0 to 0.015
Chromium (Cr), % 3.8 to 4.8
21 to 23.5
Cobalt (Co), % 0
0 to 5.0
Copper (Cu), % 0 to 0.25
1.5 to 2.5
Iron (Fe), % 75.9 to 81.4
18 to 21
Manganese (Mn), % 0.15 to 0.4
0 to 1.0
Molybdenum (Mo), % 4.3 to 5.5
6.0 to 8.0
Nickel (Ni), % 0 to 0.3
35.9 to 53.5
Niobium (Nb), % 0
0 to 0.5
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.2 to 0.45
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 5.3 to 6.5
0 to 1.5
Vanadium (V), % 3.8 to 4.5
0