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Nickel 690 vs. AISI 439 Stainless Steel

Nickel 690 belongs to the nickel alloys classification, while AISI 439 stainless steel belongs to the iron alloys. They have a modest 28% of their average alloy composition in common, which, by itself, doesn't mean much. There are 31 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 690 and the bottom bar is AISI 439 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 90
160
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 3.4 to 34
23
Fatigue Strength, MPa 180 to 300
170
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 79
77
Shear Strength, MPa 420 to 570
310
Tensile Strength: Ultimate (UTS), MPa 640 to 990
490
Tensile Strength: Yield (Proof), MPa 250 to 760
250

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Maximum Temperature: Mechanical, °C 1010
890
Melting Completion (Liquidus), °C 1380
1510
Melting Onset (Solidus), °C 1340
1430
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 14
25
Thermal Expansion, µm/m-K 14
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.5
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 1.6
3.4

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
2.3
Embodied Energy, MJ/kg 120
34
Embodied Water, L/kg 290
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31 to 170
95
Resilience: Unit (Modulus of Resilience), kJ/m3 160 to 1440
160
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 21 to 33
18
Strength to Weight: Bending, points 20 to 27
18
Thermal Diffusivity, mm2/s 3.5
6.7
Thermal Shock Resistance, points 16 to 25
16

Alloy Composition

Aluminum (Al), % 0
0 to 0.15
Carbon (C), % 0 to 0.050
0 to 0.030
Chromium (Cr), % 27 to 31
17 to 19
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 7.0 to 11
77.1 to 82.8
Manganese (Mn), % 0 to 0.5
0 to 1.0
Nickel (Ni), % 58 to 66
0 to 0.5
Nitrogen (N), % 0
0 to 0.030
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 0.030
Titanium (Ti), % 0
0.2 to 1.1