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Nickel 686 vs. ASTM Grade HE Steel

Nickel 686 belongs to the nickel alloys classification, while ASTM grade HE steel belongs to the iron alloys. They have a modest 34% of their average alloy composition in common, which, by itself, doesn't mean much. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is nickel 686 and the bottom bar is ASTM grade HE steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 51
10
Fatigue Strength, MPa 410
160
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 77
79
Tensile Strength: Ultimate (UTS), MPa 780
670
Tensile Strength: Yield (Proof), MPa 350
310

Thermal Properties

Latent Heat of Fusion, J/g 320
310
Maximum Temperature: Mechanical, °C 980
1100
Melting Completion (Liquidus), °C 1380
1400
Melting Onset (Solidus), °C 1340
1360
Specific Heat Capacity, J/kg-K 420
490
Thermal Conductivity, W/m-K 9.8
14
Thermal Expansion, µm/m-K 12
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.4
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 1.4
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 70
19
Density, g/cm3 9.0
7.7
Embodied Carbon, kg CO2/kg material 12
3.5
Embodied Energy, MJ/kg 170
50
Embodied Water, L/kg 300
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
56
Resilience: Unit (Modulus of Resilience), kJ/m3 280
240
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 24
24
Strength to Weight: Bending, points 21
22
Thermal Diffusivity, mm2/s 2.6
3.6
Thermal Shock Resistance, points 21
14

Alloy Composition

Carbon (C), % 0 to 0.010
0.2 to 0.5
Chromium (Cr), % 19 to 23
26 to 30
Iron (Fe), % 0 to 5.0
53.9 to 65.8
Manganese (Mn), % 0 to 0.75
0 to 2.0
Molybdenum (Mo), % 15 to 17
0 to 0.5
Nickel (Ni), % 49.5 to 63
8.0 to 11
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 0.080
0 to 2.0
Sulfur (S), % 0 to 0.020
0 to 0.040
Titanium (Ti), % 0.020 to 0.25
0
Tungsten (W), % 3.0 to 4.4
0