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Nickel 625 vs. S40975 Stainless Steel

Nickel 625 belongs to the nickel alloys classification, while S40975 stainless steel belongs to the iron alloys. 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 S40975 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 33 to 34
22
Fatigue Strength, MPa 240 to 320
210
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 79
75
Shear Strength, MPa 530 to 600
290
Tensile Strength: Ultimate (UTS), MPa 790 to 910
460
Tensile Strength: Yield (Proof), MPa 320 to 450
310

Thermal Properties

Latent Heat of Fusion, J/g 330
270
Maximum Temperature: Mechanical, °C 980
710
Melting Completion (Liquidus), °C 1350
1450
Melting Onset (Solidus), °C 1290
1400
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 11
26
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.3
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 1.4
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 80
6.5
Density, g/cm3 8.6
7.8
Embodied Carbon, kg CO2/kg material 14
2.0
Embodied Energy, MJ/kg 190
28
Embodied Water, L/kg 290
95

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220 to 250
93
Resilience: Unit (Modulus of Resilience), kJ/m3 260 to 490
250
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 26 to 29
17
Strength to Weight: Bending, points 22 to 24
17
Thermal Diffusivity, mm2/s 2.9
7.0
Thermal Shock Resistance, points 22 to 25
17

Alloy Composition

Aluminum (Al), % 0 to 0.4
0
Carbon (C), % 0 to 0.1
0 to 0.030
Chromium (Cr), % 20 to 23
10.5 to 11.7
Cobalt (Co), % 0 to 1.0
0
Iron (Fe), % 0 to 5.0
84.4 to 89
Manganese (Mn), % 0 to 0.5
0 to 1.0
Molybdenum (Mo), % 8.0 to 10
0
Nickel (Ni), % 58 to 68.9
0.5 to 1.0
Niobium (Nb), % 3.2 to 4.2
0
Nitrogen (N), % 0
0 to 0.030
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 to 0.75