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SAE-AISI M42 Steel vs. ACI-ASTM CB7Cu-1 Steel

Both SAE-AISI M42 steel and ACI-ASTM CB7Cu-1 steel are iron alloys. They have 80% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M42 steel and the bottom bar is ACI-ASTM CB7Cu-1 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 78
76
Tensile Strength: Ultimate (UTS), MPa 810 to 2310
960 to 1350

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Melting Completion (Liquidus), °C 1540
1430
Melting Onset (Solidus), °C 1490
1500
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 20
17
Thermal Expansion, µm/m-K 12
11

Otherwise Unclassified Properties

Base Metal Price, % relative 30
13
Density, g/cm3 8.2
7.8
Embodied Carbon, kg CO2/kg material 7.4
2.6
Embodied Energy, MJ/kg 100
38
Embodied Water, L/kg 140
130

Common Calculations

PREN (Pitting Resistance) 38
17
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 28 to 79
34 to 48
Strength to Weight: Bending, points 24 to 48
28 to 35
Thermal Diffusivity, mm2/s 5.4
4.6
Thermal Shock Resistance, points 25 to 71
32 to 45

Alloy Composition

Carbon (C), % 1.1 to 1.2
0 to 0.070
Chromium (Cr), % 3.5 to 4.3
15.5 to 17.7
Cobalt (Co), % 7.8 to 8.8
0
Copper (Cu), % 0 to 0.25
2.5 to 3.2
Iron (Fe), % 76.3 to 81
72.3 to 78.4
Manganese (Mn), % 0.15 to 0.4
0 to 0.7
Molybdenum (Mo), % 9.0 to 10
0
Nickel (Ni), % 0 to 0.3
3.6 to 4.6
Niobium (Nb), % 0
0 to 0.35
Nitrogen (N), % 0
0 to 0.050
Phosphorus (P), % 0 to 0.030
0 to 0.035
Silicon (Si), % 0.15 to 0.65
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 1.2 to 1.9
0
Vanadium (V), % 1.0 to 1.4
0