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SAE-AISI 4140 Steel vs. Nickel 625

SAE-AISI 4140 steel belongs to the iron alloys classification, while nickel 625 belongs to the nickel 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 SAE-AISI 4140 steel and the bottom bar is nickel 625.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11 to 26
33 to 34
Fatigue Strength, MPa 360 to 650
240 to 320
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
79
Shear Strength, MPa 410 to 660
530 to 600
Tensile Strength: Ultimate (UTS), MPa 690 to 1080
790 to 910
Tensile Strength: Yield (Proof), MPa 590 to 990
320 to 450

Thermal Properties

Latent Heat of Fusion, J/g 250
330
Maximum Temperature: Mechanical, °C 420
980
Melting Completion (Liquidus), °C 1460
1350
Melting Onset (Solidus), °C 1420
1290
Specific Heat Capacity, J/kg-K 470
440
Thermal Conductivity, W/m-K 43
11
Thermal Expansion, µm/m-K 13
13

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
80
Density, g/cm3 7.8
8.6
Embodied Carbon, kg CO2/kg material 1.5
14
Embodied Energy, MJ/kg 20
190
Embodied Water, L/kg 51
290

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 74 to 180
220 to 250
Resilience: Unit (Modulus of Resilience), kJ/m3 920 to 2590
260 to 490
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 25 to 38
26 to 29
Strength to Weight: Bending, points 22 to 30
22 to 24
Thermal Diffusivity, mm2/s 12
2.9
Thermal Shock Resistance, points 20 to 32
22 to 25

Alloy Composition

Aluminum (Al), % 0
0 to 0.4
Carbon (C), % 0.38 to 0.43
0 to 0.1
Chromium (Cr), % 0.8 to 1.1
20 to 23
Cobalt (Co), % 0
0 to 1.0
Iron (Fe), % 96.8 to 97.8
0 to 5.0
Manganese (Mn), % 0.75 to 1.0
0 to 0.5
Molybdenum (Mo), % 0.15 to 0.25
8.0 to 10
Nickel (Ni), % 0
58 to 68.9
Niobium (Nb), % 0
3.2 to 4.2
Phosphorus (P), % 0 to 0.035
0 to 0.015
Silicon (Si), % 0.15 to 0.35
0 to 0.5
Sulfur (S), % 0 to 0.040
0 to 0.015
Titanium (Ti), % 0
0 to 0.4

Comparable Variants