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SAE-AISI 8645 Steel vs. C72150 Copper-nickel

SAE-AISI 8645 steel belongs to the iron alloys classification, while C72150 copper-nickel belongs to the copper alloys. There are 30 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 8645 steel and the bottom bar is C72150 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 200
99
Elastic (Young's, Tensile) Modulus, GPa 190
150
Elongation at Break, % 12 to 23
29
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
55
Shear Strength, MPa 380 to 400
320
Tensile Strength: Ultimate (UTS), MPa 600 to 670
490
Tensile Strength: Yield (Proof), MPa 390 to 560
210

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 410
600
Melting Completion (Liquidus), °C 1460
1210
Melting Onset (Solidus), °C 1420
1250
Specific Heat Capacity, J/kg-K 470
410
Thermal Conductivity, W/m-K 39
22
Thermal Expansion, µm/m-K 13
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
3.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
3.6

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
45
Density, g/cm3 7.8
8.9
Embodied Carbon, kg CO2/kg material 1.5
6.1
Embodied Energy, MJ/kg 20
88
Embodied Water, L/kg 50
270

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 77 to 120
120
Resilience: Unit (Modulus of Resilience), kJ/m3 420 to 840
150
Stiffness to Weight: Axial, points 13
9.1
Stiffness to Weight: Bending, points 24
20
Strength to Weight: Axial, points 21 to 24
15
Strength to Weight: Bending, points 20 to 22
15
Thermal Diffusivity, mm2/s 10
6.0
Thermal Shock Resistance, points 18 to 20
18

Alloy Composition

Carbon (C), % 0.43 to 0.48
0 to 0.1
Chromium (Cr), % 0.4 to 0.6
0
Copper (Cu), % 0
52.5 to 57
Iron (Fe), % 96.5 to 97.7
0 to 0.1
Lead (Pb), % 0
0 to 0.050
Manganese (Mn), % 0.75 to 1.0
0 to 0.050
Molybdenum (Mo), % 0.15 to 0.25
0
Nickel (Ni), % 0.4 to 0.7
43 to 46
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0.15 to 0.35
0 to 0.5
Sulfur (S), % 0 to 0.040
0
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0
0 to 0.5