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Nickel 690 vs. S44625 Stainless Steel

Nickel 690 belongs to the nickel alloys classification, while S44625 stainless steel belongs to the iron alloys. They have a modest 36% 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 nickel 690 and the bottom bar is S44625 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 3.4 to 34
22
Fatigue Strength, MPa 180 to 300
240
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 79
80
Shear Strength, MPa 420 to 570
370
Tensile Strength: Ultimate (UTS), MPa 640 to 990
590
Tensile Strength: Yield (Proof), MPa 250 to 760
360

Thermal Properties

Latent Heat of Fusion, J/g 320
290
Maximum Temperature: Mechanical, °C 1010
1100
Melting Completion (Liquidus), °C 1380
1440
Melting Onset (Solidus), °C 1340
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 14
17
Thermal Expansion, µm/m-K 14
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.5
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 1.6
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 50
14
Density, g/cm3 8.3
7.7
Embodied Carbon, kg CO2/kg material 8.2
2.8
Embodied Energy, MJ/kg 120
39
Embodied Water, L/kg 290
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31 to 170
110
Resilience: Unit (Modulus of Resilience), kJ/m3 160 to 1440
310
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 21 to 33
21
Strength to Weight: Bending, points 20 to 27
20
Thermal Diffusivity, mm2/s 3.5
4.6
Thermal Shock Resistance, points 16 to 25
19

Alloy Composition

Carbon (C), % 0 to 0.050
0 to 0.010
Chromium (Cr), % 27 to 31
25 to 27.5
Copper (Cu), % 0 to 0.5
0 to 0.2
Iron (Fe), % 7.0 to 11
69.4 to 74.3
Manganese (Mn), % 0 to 0.5
0 to 0.4
Molybdenum (Mo), % 0
0.75 to 1.5
Nickel (Ni), % 58 to 66
0 to 0.5
Nitrogen (N), % 0
0 to 0.015
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 0.5
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.020