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Nickel 689 vs. Grade 21 Titanium

Nickel 689 belongs to the nickel alloys classification, while grade 21 titanium belongs to the titanium alloys. There are 27 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 689 and the bottom bar is grade 21 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
140
Elongation at Break, % 23
9.0 to 17
Fatigue Strength, MPa 420
550 to 660
Poisson's Ratio 0.29
0.32
Reduction in Area, % 21
22
Shear Modulus, GPa 80
51
Shear Strength, MPa 790
550 to 790
Tensile Strength: Ultimate (UTS), MPa 1250
890 to 1340
Tensile Strength: Yield (Proof), MPa 690
870 to 1170

Thermal Properties

Latent Heat of Fusion, J/g 330
410
Maximum Temperature: Mechanical, °C 990
310
Melting Completion (Liquidus), °C 1440
1740
Melting Onset (Solidus), °C 1390
1690
Specific Heat Capacity, J/kg-K 450
500
Thermal Expansion, µm/m-K 12
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 70
60
Density, g/cm3 8.5
5.4
Embodied Carbon, kg CO2/kg material 11
32
Embodied Energy, MJ/kg 150
490
Embodied Water, L/kg 330
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
110 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 1170
2760 to 5010
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
32
Strength to Weight: Axial, points 41
46 to 69
Strength to Weight: Bending, points 30
38 to 50
Thermal Shock Resistance, points 35
66 to 100

Alloy Composition

Aluminum (Al), % 0.75 to 1.3
2.5 to 3.5
Boron (B), % 0.0030 to 0.010
0
Carbon (C), % 0.1 to 0.2
0 to 0.050
Chromium (Cr), % 18 to 20
0
Cobalt (Co), % 9.0 to 11
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0 to 5.0
0 to 0.4
Manganese (Mn), % 0 to 0.5
0
Molybdenum (Mo), % 9.0 to 10.5
14 to 16
Nickel (Ni), % 48.3 to 60.9
0
Niobium (Nb), % 0
2.2 to 3.2
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.17
Phosphorus (P), % 0 to 0.015
0
Silicon (Si), % 0 to 0.5
0.15 to 0.25
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 2.3 to 2.8
76 to 81.2
Residuals, % 0
0 to 0.4