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ACI-ASTM CF8C Steel vs. Nickel 689

ACI-ASTM CF8C steel belongs to the iron alloys classification, while nickel 689 belongs to the nickel 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 ACI-ASTM CF8C steel and the bottom bar is nickel 689.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

Aluminum (Al), % 0
0.75 to 1.3
Boron (B), % 0
0.0030 to 0.010
Carbon (C), % 0 to 0.080
0.1 to 0.2
Chromium (Cr), % 18 to 21
18 to 20
Cobalt (Co), % 0
9.0 to 11
Iron (Fe), % 61.8 to 73
0 to 5.0
Manganese (Mn), % 0 to 1.5
0 to 0.5
Molybdenum (Mo), % 0 to 0.5
9.0 to 10.5
Nickel (Ni), % 9.0 to 12
48.3 to 60.9
Niobium (Nb), % 0 to 1.0
0
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0 to 2.0
0 to 0.5
Sulfur (S), % 0 to 0.040
0 to 0.015
Titanium (Ti), % 0
2.3 to 2.8