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Nickel 685 vs. SAE-AISI O2 Steel

Nickel 685 belongs to the nickel alloys classification, while SAE-AISI O2 steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is nickel 685 and the bottom bar is SAE-AISI O2 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 77
72
Tensile Strength: Ultimate (UTS), MPa 1250
640 to 2050

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Melting Completion (Liquidus), °C 1380
1450
Melting Onset (Solidus), °C 1330
1410
Specific Heat Capacity, J/kg-K 460
470
Thermal Conductivity, W/m-K 13
43
Thermal Expansion, µm/m-K 12
11

Otherwise Unclassified Properties

Base Metal Price, % relative 75
2.4
Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 10
1.8
Embodied Energy, MJ/kg 140
26
Embodied Water, L/kg 340
50

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 42
23 to 73
Strength to Weight: Bending, points 31
21 to 46
Thermal Diffusivity, mm2/s 3.3
12
Thermal Shock Resistance, points 37
22 to 70

Alloy Composition

Aluminum (Al), % 1.2 to 1.6
0
Boron (B), % 0.0030 to 0.010
0
Carbon (C), % 0.030 to 0.1
0.85 to 1.0
Chromium (Cr), % 18 to 21
0 to 0.5
Cobalt (Co), % 12 to 15
0
Copper (Cu), % 0 to 0.5
0 to 0.25
Iron (Fe), % 0 to 2.0
95 to 97.8
Manganese (Mn), % 0 to 1.0
1.4 to 1.8
Molybdenum (Mo), % 3.5 to 5.0
0 to 0.3
Nickel (Ni), % 49.6 to 62.5
0 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0 to 0.75
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 2.8 to 3.3
0
Vanadium (V), % 0
0 to 0.3
Zinc (Zn), % 0.020 to 0.12
0