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Nickel 689 vs. AISI 321 Stainless Steel

Nickel 689 belongs to the nickel alloys classification, while AISI 321 stainless steel belongs to the iron alloys. They have a modest 32% 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 (7, in this case) are not shown.

For each property being compared, the top bar is nickel 689 and the bottom bar is AISI 321 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 350
170 to 210
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 23
34 to 50
Fatigue Strength, MPa 420
220 to 270
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 80
77
Shear Strength, MPa 790
420 to 460
Tensile Strength: Ultimate (UTS), MPa 1250
590 to 690
Tensile Strength: Yield (Proof), MPa 690
220 to 350

Thermal Properties

Latent Heat of Fusion, J/g 330
290
Maximum Temperature: Mechanical, °C 990
870
Melting Completion (Liquidus), °C 1440
1430
Melting Onset (Solidus), °C 1390
1400
Specific Heat Capacity, J/kg-K 450
480
Thermal Expansion, µm/m-K 12
17

Otherwise Unclassified Properties

Base Metal Price, % relative 70
16
Density, g/cm3 8.5
7.8
Embodied Carbon, kg CO2/kg material 11
3.2
Embodied Energy, MJ/kg 150
45
Embodied Water, L/kg 330
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
190 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 1170
130 to 310
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 41
21 to 25
Strength to Weight: Bending, points 30
20 to 22
Thermal Shock Resistance, points 35
13 to 15

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 0.080
Chromium (Cr), % 18 to 20
17 to 19
Cobalt (Co), % 9.0 to 11
0
Iron (Fe), % 0 to 5.0
65.3 to 74
Manganese (Mn), % 0 to 0.5
0 to 2.0
Molybdenum (Mo), % 9.0 to 10.5
0
Nickel (Ni), % 48.3 to 60.9
9.0 to 12
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.015
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 0.75
Sulfur (S), % 0 to 0.015
0 to 0.030
Titanium (Ti), % 2.3 to 2.8
0 to 0.7