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SAE-AISI 8645 Steel vs. Nickel 242

SAE-AISI 8645 steel belongs to the iron alloys classification, while nickel 242 belongs to the nickel alloys. There are 30 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 8645 steel and the bottom bar is nickel 242.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 12 to 23
45
Fatigue Strength, MPa 280 to 350
300
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 73
84
Shear Strength, MPa 380 to 400
570
Tensile Strength: Ultimate (UTS), MPa 600 to 670
820
Tensile Strength: Yield (Proof), MPa 390 to 560
350

Thermal Properties

Latent Heat of Fusion, J/g 250
330
Maximum Temperature: Mechanical, °C 410
930
Melting Completion (Liquidus), °C 1460
1380
Melting Onset (Solidus), °C 1420
1290
Specific Heat Capacity, J/kg-K 470
400
Thermal Conductivity, W/m-K 39
11
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
1.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
75
Density, g/cm3 7.8
9.0
Embodied Carbon, kg CO2/kg material 1.5
14
Embodied Energy, MJ/kg 20
180
Embodied Water, L/kg 50
290

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 77 to 120
300
Resilience: Unit (Modulus of Resilience), kJ/m3 420 to 840
280
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
22
Strength to Weight: Axial, points 21 to 24
25
Strength to Weight: Bending, points 20 to 22
21
Thermal Diffusivity, mm2/s 10
3.1
Thermal Shock Resistance, points 18 to 20
25

Alloy Composition

Aluminum (Al), % 0
0 to 0.5
Boron (B), % 0
0 to 0.0060
Carbon (C), % 0.43 to 0.48
0 to 0.030
Chromium (Cr), % 0.4 to 0.6
7.0 to 9.0
Cobalt (Co), % 0
0 to 1.0
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 96.5 to 97.7
0 to 2.0
Manganese (Mn), % 0.75 to 1.0
0 to 0.8
Molybdenum (Mo), % 0.15 to 0.25
24 to 26
Nickel (Ni), % 0.4 to 0.7
59.3 to 69
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0.15 to 0.35
0 to 0.8
Sulfur (S), % 0 to 0.040
0 to 0.015