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Nickel 625 vs. AISI 431 Stainless Steel

Nickel 625 belongs to the nickel alloys classification, while AISI 431 stainless steel belongs to the iron alloys. They have a modest 21% 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 (5, in this case) are not shown.

For each property being compared, the top bar is nickel 625 and the bottom bar is AISI 431 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 33 to 34
15 to 17
Fatigue Strength, MPa 240 to 320
430 to 610
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 79
77
Shear Strength, MPa 530 to 600
550 to 840
Tensile Strength: Ultimate (UTS), MPa 790 to 910
890 to 1380
Tensile Strength: Yield (Proof), MPa 320 to 450
710 to 1040

Thermal Properties

Latent Heat of Fusion, J/g 330
280
Maximum Temperature: Mechanical, °C 980
850
Melting Completion (Liquidus), °C 1350
1510
Melting Onset (Solidus), °C 1290
1450
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 11
26
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.3
2.6
Electrical Conductivity: Equal Weight (Specific), % IACS 1.4
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 80
9.0
Density, g/cm3 8.6
7.7
Embodied Carbon, kg CO2/kg material 14
2.2
Embodied Energy, MJ/kg 190
31
Embodied Water, L/kg 290
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220 to 250
140 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 260 to 490
1270 to 2770
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 26 to 29
32 to 50
Strength to Weight: Bending, points 22 to 24
27 to 36
Thermal Diffusivity, mm2/s 2.9
7.0
Thermal Shock Resistance, points 22 to 25
28 to 43

Alloy Composition

Aluminum (Al), % 0 to 0.4
0
Carbon (C), % 0 to 0.1
0 to 0.2
Chromium (Cr), % 20 to 23
15 to 17
Cobalt (Co), % 0 to 1.0
0
Iron (Fe), % 0 to 5.0
78.2 to 83.8
Manganese (Mn), % 0 to 0.5
0 to 1.0
Molybdenum (Mo), % 8.0 to 10
0
Nickel (Ni), % 58 to 68.9
1.3 to 2.5
Niobium (Nb), % 3.2 to 4.2
0
Phosphorus (P), % 0 to 0.015
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030
Titanium (Ti), % 0 to 0.4
0