MakeItFrom.com
Menu (ESC)

SAE-AISI 8645 Steel vs. Nickel 825

SAE-AISI 8645 steel belongs to the iron alloys classification, while nickel 825 belongs to the nickel alloys. They have a modest 32% of their average alloy composition in common, which, by itself, doesn't mean much. There are 30 material properties with values for both materials. Properties with values for just one material (3, 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 825.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 12 to 23
34
Fatigue Strength, MPa 280 to 350
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
78
Shear Strength, MPa 380 to 400
430
Tensile Strength: Ultimate (UTS), MPa 600 to 670
650
Tensile Strength: Yield (Proof), MPa 390 to 560
260

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 410
980
Melting Completion (Liquidus), °C 1460
1400
Melting Onset (Solidus), °C 1420
1370
Specific Heat Capacity, J/kg-K 470
460
Thermal Conductivity, W/m-K 39
11
Thermal Expansion, µm/m-K 13
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
1.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
1.7

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
41
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 50
230

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 77 to 120
180
Resilience: Unit (Modulus of Resilience), kJ/m3 420 to 840
170
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21 to 24
22
Strength to Weight: Bending, points 20 to 22
20
Thermal Diffusivity, mm2/s 10
2.9
Thermal Shock Resistance, points 18 to 20
17

Alloy Composition

Aluminum (Al), % 0
0 to 0.2
Carbon (C), % 0.43 to 0.48
0 to 0.050
Chromium (Cr), % 0.4 to 0.6
19.5 to 23.5
Copper (Cu), % 0
1.5 to 3.0
Iron (Fe), % 96.5 to 97.7
22 to 37.9
Manganese (Mn), % 0.75 to 1.0
0 to 1.0
Molybdenum (Mo), % 0.15 to 0.25
2.5 to 3.5
Nickel (Ni), % 0.4 to 0.7
38 to 46
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0.15 to 0.35
0 to 0.050
Sulfur (S), % 0 to 0.040
0 to 0.030
Titanium (Ti), % 0
0.6 to 1.2