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Nickel 690 vs. AISI 440C Stainless Steel

Nickel 690 belongs to the nickel alloys classification, while AISI 440C stainless steel belongs to the iron alloys. They have a modest 27% of their average alloy composition in common, which, by itself, doesn't mean much. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is nickel 690 and the bottom bar is AISI 440C stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 3.4 to 34
2.0 to 14
Fatigue Strength, MPa 180 to 300
260 to 840
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 79
76
Shear Strength, MPa 420 to 570
430 to 1120
Tensile Strength: Ultimate (UTS), MPa 640 to 990
710 to 1970
Tensile Strength: Yield (Proof), MPa 250 to 760
450 to 1900

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Maximum Temperature: Mechanical, °C 1010
870
Melting Completion (Liquidus), °C 1380
1480
Melting Onset (Solidus), °C 1340
1370
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 14
22
Thermal Expansion, µm/m-K 14
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.5
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 1.6
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 50
9.0
Density, g/cm3 8.3
7.7
Embodied Carbon, kg CO2/kg material 8.2
2.2
Embodied Energy, MJ/kg 120
31
Embodied Water, L/kg 290
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31 to 170
39 to 88
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 21 to 33
26 to 71
Strength to Weight: Bending, points 20 to 27
23 to 46
Thermal Diffusivity, mm2/s 3.5
6.0
Thermal Shock Resistance, points 16 to 25
26 to 71

Alloy Composition

Carbon (C), % 0 to 0.050
1.0 to 1.2
Chromium (Cr), % 27 to 31
16 to 18
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 7.0 to 11
78 to 83.1
Manganese (Mn), % 0 to 0.5
0 to 1.0
Molybdenum (Mo), % 0
0 to 0.75
Nickel (Ni), % 58 to 66
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015

Comparable Variants