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ACI-ASTM CK3MCuN Steel vs. SAE-AISI 8620 Steel

Both ACI-ASTM CK3MCuN steel and SAE-AISI 8620 steel are iron alloys. They have 55% of their average alloy composition in common. There are 30 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 ACI-ASTM CK3MCuN steel and the bottom bar is SAE-AISI 8620 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
150 to 210
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 39
13 to 31
Fatigue Strength, MPa 250
270 to 360
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 80
73
Tensile Strength: Ultimate (UTS), MPa 620
520 to 690
Tensile Strength: Yield (Proof), MPa 290
360 to 570

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1090
410
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1350
1420
Specific Heat Capacity, J/kg-K 460
470
Thermal Conductivity, W/m-K 12
39
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 29
2.6
Density, g/cm3 8.0
7.8
Embodied Carbon, kg CO2/kg material 5.6
1.5
Embodied Energy, MJ/kg 76
20
Embodied Water, L/kg 190
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
86 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 210
340 to 880
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21
18 to 24
Strength to Weight: Bending, points 20
18 to 22
Thermal Diffusivity, mm2/s 3.2
10
Thermal Shock Resistance, points 14
15 to 20

Alloy Composition

Carbon (C), % 0 to 0.025
0.18 to 0.23
Chromium (Cr), % 19.5 to 20.5
0.4 to 0.6
Copper (Cu), % 0.5 to 1.0
0
Iron (Fe), % 49.5 to 56.3
96.9 to 98
Manganese (Mn), % 0 to 1.2
0.7 to 0.9
Molybdenum (Mo), % 6.0 to 7.0
0.15 to 0.25
Nickel (Ni), % 17.5 to 19.5
0.4 to 0.7
Nitrogen (N), % 0.18 to 0.24
0
Phosphorus (P), % 0 to 0.045
0 to 0.035
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.010
0 to 0.040