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SAE-AISI O2 Steel vs. Nickel 685

SAE-AISI O2 steel belongs to the iron alloys classification, while nickel 685 belongs to the nickel 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 SAE-AISI O2 steel and the bottom bar is nickel 685.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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