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SAE-AISI 81B45 Steel vs. N08120 Nickel

SAE-AISI 81B45 steel belongs to the iron alloys classification, while N08120 nickel belongs to the nickel alloys. They have a modest 33% of their average alloy composition in common, which, by itself, doesn't mean much. There are 28 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 SAE-AISI 81B45 steel and the bottom bar is N08120 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 12 to 24
34
Fatigue Strength, MPa 250 to 350
230
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
79
Shear Strength, MPa 340 to 400
470
Tensile Strength: Ultimate (UTS), MPa 540 to 670
700
Tensile Strength: Yield (Proof), MPa 350 to 560
310

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Maximum Temperature: Mechanical, °C 410
1000
Melting Completion (Liquidus), °C 1460
1420
Melting Onset (Solidus), °C 1420
1370
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 40
11
Thermal Expansion, µm/m-K 12
14

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
45
Density, g/cm3 7.8
8.2
Embodied Carbon, kg CO2/kg material 1.5
7.2
Embodied Energy, MJ/kg 20
100
Embodied Water, L/kg 49
240

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 77 to 110
190
Resilience: Unit (Modulus of Resilience), kJ/m3 320 to 840
240
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 19 to 24
24
Strength to Weight: Bending, points 19 to 22
21
Thermal Diffusivity, mm2/s 11
3.0
Thermal Shock Resistance, points 17 to 21
17

Alloy Composition

Aluminum (Al), % 0
0 to 0.4
Boron (B), % 0.00050 to 0.0030
0 to 0.010
Carbon (C), % 0.43 to 0.48
0.020 to 0.1
Chromium (Cr), % 0.35 to 0.55
23 to 27
Cobalt (Co), % 0
0 to 3.0
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 97 to 98
21 to 41.4
Manganese (Mn), % 0.75 to 1.0
0 to 1.5
Molybdenum (Mo), % 0.080 to 0.15
0 to 2.5
Nickel (Ni), % 0.2 to 0.4
35 to 39
Niobium (Nb), % 0
0.4 to 0.9
Nitrogen (N), % 0
0.15 to 0.3
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.030
Titanium (Ti), % 0
0 to 0.2
Tungsten (W), % 0
0 to 2.5