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Nickel 625 vs. SAE-AISI 8637 Steel

Nickel 625 belongs to the nickel alloys classification, while SAE-AISI 8637 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is nickel 625 and the bottom bar is SAE-AISI 8637 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 33 to 34
23
Fatigue Strength, MPa 240 to 320
260
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 79
73
Shear Strength, MPa 530 to 600
340
Tensile Strength: Ultimate (UTS), MPa 790 to 910
540
Tensile Strength: Yield (Proof), MPa 320 to 450
360

Thermal Properties

Latent Heat of Fusion, J/g 330
250
Maximum Temperature: Mechanical, °C 980
410
Melting Completion (Liquidus), °C 1350
1460
Melting Onset (Solidus), °C 1290
1420
Specific Heat Capacity, J/kg-K 440
470
Thermal Conductivity, W/m-K 11
38
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.3
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 1.4
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 80
2.6
Density, g/cm3 8.6
7.8
Embodied Carbon, kg CO2/kg material 14
1.5
Embodied Energy, MJ/kg 190
20
Embodied Water, L/kg 290
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220 to 250
110
Resilience: Unit (Modulus of Resilience), kJ/m3 260 to 490
340
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 26 to 29
19
Strength to Weight: Bending, points 22 to 24
19
Thermal Diffusivity, mm2/s 2.9
10
Thermal Shock Resistance, points 22 to 25
18

Alloy Composition

Aluminum (Al), % 0 to 0.4
0
Carbon (C), % 0 to 0.1
0.35 to 0.4
Chromium (Cr), % 20 to 23
0.4 to 0.6
Cobalt (Co), % 0 to 1.0
0
Iron (Fe), % 0 to 5.0
96.6 to 97.8
Manganese (Mn), % 0 to 0.5
0.75 to 1.0
Molybdenum (Mo), % 8.0 to 10
0.15 to 0.25
Nickel (Ni), % 58 to 68.9
0.4 to 0.7
Niobium (Nb), % 3.2 to 4.2
0
Phosphorus (P), % 0 to 0.015
0 to 0.035
Silicon (Si), % 0 to 0.5
0.15 to 0.35
Sulfur (S), % 0 to 0.015
0 to 0.040
Titanium (Ti), % 0 to 0.4
0