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SAE-AISI M42 Steel vs. C12900 Copper

SAE-AISI M42 steel belongs to the iron alloys classification, while C12900 copper belongs to the copper alloys. There are 21 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M42 steel and the bottom bar is C12900 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
120
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 78
43
Tensile Strength: Ultimate (UTS), MPa 810 to 2310
220 to 420

Thermal Properties

Latent Heat of Fusion, J/g 270
210
Melting Completion (Liquidus), °C 1540
1080
Melting Onset (Solidus), °C 1490
1030
Specific Heat Capacity, J/kg-K 450
390
Thermal Conductivity, W/m-K 20
380
Thermal Expansion, µm/m-K 12
17

Otherwise Unclassified Properties

Base Metal Price, % relative 30
32
Density, g/cm3 8.2
9.0
Embodied Carbon, kg CO2/kg material 7.4
2.6
Embodied Energy, MJ/kg 100
41
Embodied Water, L/kg 140
330

Common Calculations

Stiffness to Weight: Axial, points 14
7.2
Stiffness to Weight: Bending, points 24
18
Strength to Weight: Axial, points 28 to 79
6.8 to 13
Strength to Weight: Bending, points 24 to 48
9.1 to 14
Thermal Diffusivity, mm2/s 5.4
110
Thermal Shock Resistance, points 25 to 71
7.8 to 15

Alloy Composition

Antimony (Sb), % 0
0 to 0.0030
Arsenic (As), % 0
0 to 0.012
Bismuth (Bi), % 0
0 to 0.0030
Carbon (C), % 1.1 to 1.2
0
Chromium (Cr), % 3.5 to 4.3
0
Cobalt (Co), % 7.8 to 8.8
0
Copper (Cu), % 0 to 0.25
99.88 to 100
Iron (Fe), % 76.3 to 81
0
Lead (Pb), % 0
0 to 0.0040
Manganese (Mn), % 0.15 to 0.4
0
Molybdenum (Mo), % 9.0 to 10
0
Nickel (Ni), % 0 to 0.3
0 to 0.050
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.15 to 0.65
0
Silver (Ag), % 0
0 to 0.054
Sulfur (S), % 0 to 0.030
0
Tellurium (Te), % 0
0 to 0.025
Tungsten (W), % 1.2 to 1.9
0
Vanadium (V), % 1.0 to 1.4
0