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Nickel 689 vs. AISI 444 Stainless Steel

Nickel 689 belongs to the nickel alloys classification, while AISI 444 stainless steel belongs to the iron alloys. They have a modest 25% of their average alloy composition in common, which, by itself, doesn't mean much. There are 27 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is nickel 689 and the bottom bar is AISI 444 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 350
190
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 23
23
Fatigue Strength, MPa 420
210
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 80
78
Shear Strength, MPa 790
300
Tensile Strength: Ultimate (UTS), MPa 1250
470
Tensile Strength: Yield (Proof), MPa 690
310

Thermal Properties

Latent Heat of Fusion, J/g 330
290
Maximum Temperature: Mechanical, °C 990
930
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1390
1420
Specific Heat Capacity, J/kg-K 450
480
Thermal Expansion, µm/m-K 12
10

Otherwise Unclassified Properties

Base Metal Price, % relative 70
15
Density, g/cm3 8.5
7.7
Embodied Carbon, kg CO2/kg material 11
3.4
Embodied Energy, MJ/kg 150
47
Embodied Water, L/kg 330
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
95
Resilience: Unit (Modulus of Resilience), kJ/m3 1170
240
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 41
17
Strength to Weight: Bending, points 30
17
Thermal Shock Resistance, points 35
16

Alloy Composition

Aluminum (Al), % 0.75 to 1.3
0
Boron (B), % 0.0030 to 0.010
0
Carbon (C), % 0.1 to 0.2
0 to 0.025
Chromium (Cr), % 18 to 20
17.5 to 19.5
Cobalt (Co), % 9.0 to 11
0
Iron (Fe), % 0 to 5.0
73.3 to 80.8
Manganese (Mn), % 0 to 0.5
0 to 1.0
Molybdenum (Mo), % 9.0 to 10.5
1.8 to 2.5
Nickel (Ni), % 48.3 to 60.9
0 to 1.0
Niobium (Nb), % 0
0.2 to 0.8
Nitrogen (N), % 0
0 to 0.035
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), % 2.3 to 2.8
0.2 to 0.8