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Nickel 690 vs. AISI 409 Stainless Steel

Nickel 690 belongs to the nickel alloys classification, while AISI 409 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 (3, in this case) are not shown.

For each property being compared, the top bar is nickel 690 and the bottom bar is AISI 409 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 3.4 to 34
24
Fatigue Strength, MPa 180 to 300
140
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 79
75
Shear Strength, MPa 420 to 570
270
Tensile Strength: Ultimate (UTS), MPa 640 to 990
420
Tensile Strength: Yield (Proof), MPa 250 to 760
200

Thermal Properties

Latent Heat of Fusion, J/g 320
270
Maximum Temperature: Mechanical, °C 1010
710
Melting Completion (Liquidus), °C 1380
1450
Melting Onset (Solidus), °C 1340
1400
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
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 50
6.5
Density, g/cm3 8.3
7.7
Embodied Carbon, kg CO2/kg material 8.2
2.0
Embodied Energy, MJ/kg 120
28
Embodied Water, L/kg 290
94

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31 to 170
83
Resilience: Unit (Modulus of Resilience), kJ/m3 160 to 1440
100
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 21 to 33
15
Strength to Weight: Bending, points 20 to 27
16
Thermal Diffusivity, mm2/s 3.5
6.7
Thermal Shock Resistance, points 16 to 25
15

Alloy Composition

Carbon (C), % 0 to 0.050
0 to 0.080
Chromium (Cr), % 27 to 31
10.5 to 11.7
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 7.0 to 11
84.9 to 89.5
Manganese (Mn), % 0 to 0.5
0 to 1.0
Nickel (Ni), % 58 to 66
0 to 0.5
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030
Titanium (Ti), % 0
0 to 0.75