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Nickel 689 vs. ACI-ASTM CF8C Steel

Nickel 689 belongs to the nickel alloys classification, while ACI-ASTM CF8C steel belongs to the iron alloys. They have a modest 33% of their average alloy composition in common, which, by itself, doesn't mean much. There are 26 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 ACI-ASTM CF8C steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 350
150
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 23
40
Fatigue Strength, MPa 420
220
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 80
77
Tensile Strength: Ultimate (UTS), MPa 1250
530
Tensile Strength: Yield (Proof), MPa 690
260

Thermal Properties

Latent Heat of Fusion, J/g 330
300
Maximum Temperature: Mechanical, °C 990
980
Melting Completion (Liquidus), °C 1440
1420
Melting Onset (Solidus), °C 1390
1430
Specific Heat Capacity, J/kg-K 450
480
Thermal Expansion, µm/m-K 12
17

Otherwise Unclassified Properties

Base Metal Price, % relative 70
19
Density, g/cm3 8.5
7.8
Embodied Carbon, kg CO2/kg material 11
3.7
Embodied Energy, MJ/kg 150
53
Embodied Water, L/kg 330
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
180
Resilience: Unit (Modulus of Resilience), kJ/m3 1170
170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 41
19
Strength to Weight: Bending, points 30
19
Thermal Shock Resistance, points 35
11

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
18 to 21
Cobalt (Co), % 9.0 to 11
0
Iron (Fe), % 0 to 5.0
61.8 to 73
Manganese (Mn), % 0 to 0.5
0 to 1.5
Molybdenum (Mo), % 9.0 to 10.5
0 to 0.5
Nickel (Ni), % 48.3 to 60.9
9.0 to 12
Niobium (Nb), % 0
0 to 1.0
Phosphorus (P), % 0 to 0.015
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 2.0
Sulfur (S), % 0 to 0.015
0 to 0.040
Titanium (Ti), % 2.3 to 2.8
0