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ACI-ASTM CH20 Steel vs. Nickel 684

ACI-ASTM CH20 steel belongs to the iron alloys classification, while nickel 684 belongs to the nickel alloys. They have a modest 34% 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 CH20 steel and the bottom bar is nickel 684.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
310
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 38
11
Fatigue Strength, MPa 290
390
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 78
76
Tensile Strength: Ultimate (UTS), MPa 610
1190
Tensile Strength: Yield (Proof), MPa 350
800

Thermal Properties

Latent Heat of Fusion, J/g 310
320
Maximum Temperature: Mechanical, °C 1100
1000
Melting Completion (Liquidus), °C 1410
1370
Melting Onset (Solidus), °C 1430
1320
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 15
13

Otherwise Unclassified Properties

Base Metal Price, % relative 20
75
Density, g/cm3 7.8
8.3
Embodied Carbon, kg CO2/kg material 3.7
10
Embodied Energy, MJ/kg 53
140
Embodied Water, L/kg 180
360

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
120
Resilience: Unit (Modulus of Resilience), kJ/m3 300
1610
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 22
40
Strength to Weight: Bending, points 21
30
Thermal Shock Resistance, points 15
34

Alloy Composition

Aluminum (Al), % 0
2.5 to 3.3
Boron (B), % 0
0.0030 to 0.010
Carbon (C), % 0 to 0.2
0 to 0.15
Chromium (Cr), % 22 to 26
15 to 20
Cobalt (Co), % 0
13 to 20
Copper (Cu), % 0
0 to 0.15
Iron (Fe), % 54.7 to 66
0 to 4.0
Manganese (Mn), % 0 to 1.5
0 to 0.75
Molybdenum (Mo), % 0 to 0.5
3.0 to 5.0
Nickel (Ni), % 12 to 15
42.7 to 64
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0 to 2.0
0 to 0.75
Sulfur (S), % 0 to 0.040
0 to 0.015
Titanium (Ti), % 0
2.5 to 3.3