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Nickel 686 vs. SAE-AISI M4 Steel

Nickel 686 belongs to the nickel alloys classification, while SAE-AISI M4 steel belongs to the iron alloys. 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 nickel 686 and the bottom bar is SAE-AISI M4 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 77
76
Tensile Strength: Ultimate (UTS), MPa 780
770 to 2150

Thermal Properties

Latent Heat of Fusion, J/g 320
260
Melting Completion (Liquidus), °C 1380
1610
Melting Onset (Solidus), °C 1340
1560
Specific Heat Capacity, J/kg-K 420
440
Thermal Conductivity, W/m-K 9.8
25
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 70
25
Density, g/cm3 9.0
8.3
Embodied Carbon, kg CO2/kg material 12
14
Embodied Energy, MJ/kg 170
210
Embodied Water, L/kg 300
110

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 22
23
Strength to Weight: Axial, points 24
26 to 72
Strength to Weight: Bending, points 21
23 to 45
Thermal Diffusivity, mm2/s 2.6
6.9
Thermal Shock Resistance, points 21
24 to 68

Alloy Composition

Carbon (C), % 0 to 0.010
1.3 to 1.4
Chromium (Cr), % 19 to 23
3.8 to 4.8
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0 to 5.0
75.9 to 81.4
Manganese (Mn), % 0 to 0.75
0.15 to 0.4
Molybdenum (Mo), % 15 to 17
4.3 to 5.5
Nickel (Ni), % 49.5 to 63
0 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 0.080
0.2 to 0.45
Sulfur (S), % 0 to 0.020
0 to 0.030
Titanium (Ti), % 0.020 to 0.25
0
Tungsten (W), % 3.0 to 4.4
5.3 to 6.5
Vanadium (V), % 0
3.8 to 4.5