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Nickel 686 vs. ASTM Grade HT Steel

Nickel 686 belongs to the nickel alloys classification, while ASTM grade HT steel belongs to the iron alloys. They have 55% of their average alloy composition in common. 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 HT steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 51
4.6
Fatigue Strength, MPa 410
130
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 77
76
Tensile Strength: Ultimate (UTS), MPa 780
500
Tensile Strength: Yield (Proof), MPa 350
270

Thermal Properties

Latent Heat of Fusion, J/g 320
310
Maximum Temperature: Mechanical, °C 980
1010
Melting Completion (Liquidus), °C 1380
1390
Melting Onset (Solidus), °C 1340
1340
Specific Heat Capacity, J/kg-K 420
480
Thermal Conductivity, W/m-K 9.8
12
Thermal Expansion, µm/m-K 12
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.4
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 1.4
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 70
31
Density, g/cm3 9.0
8.0
Embodied Carbon, kg CO2/kg material 12
5.4
Embodied Energy, MJ/kg 170
76
Embodied Water, L/kg 300
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
19
Resilience: Unit (Modulus of Resilience), kJ/m3 280
180
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 24
18
Strength to Weight: Bending, points 21
18
Thermal Diffusivity, mm2/s 2.6
3.2
Thermal Shock Resistance, points 21
12

Alloy Composition

Carbon (C), % 0 to 0.010
0.35 to 0.75
Chromium (Cr), % 19 to 23
15 to 19
Iron (Fe), % 0 to 5.0
38.2 to 51.7
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
33 to 37
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 0.080
0 to 2.5
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