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ACI-ASTM CB7Cu-2 Steel vs. SAE-AISI M42 Steel

Both ACI-ASTM CB7Cu-2 steel and SAE-AISI M42 steel are iron alloys. They have 81% of their average alloy composition in common. There are 22 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 CB7Cu-2 steel and the bottom bar is SAE-AISI M42 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
78
Tensile Strength: Ultimate (UTS), MPa 960 to 1350
810 to 2310

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Melting Completion (Liquidus), °C 1430
1540
Melting Onset (Solidus), °C 1380
1490
Specific Heat Capacity, J/kg-K 480
450
Thermal Conductivity, W/m-K 17
20
Thermal Expansion, µm/m-K 11
12

Otherwise Unclassified Properties

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

Common Calculations

PREN (Pitting Resistance) 15
38
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 34 to 48
28 to 79
Strength to Weight: Bending, points 28 to 35
24 to 48
Thermal Diffusivity, mm2/s 4.6
5.4
Thermal Shock Resistance, points 32 to 45
25 to 71

Alloy Composition

Carbon (C), % 0 to 0.070
1.1 to 1.2
Chromium (Cr), % 14 to 15.5
3.5 to 4.3
Cobalt (Co), % 0
7.8 to 8.8
Copper (Cu), % 2.5 to 3.2
0 to 0.25
Iron (Fe), % 73.6 to 79
76.3 to 81
Manganese (Mn), % 0 to 0.7
0.15 to 0.4
Molybdenum (Mo), % 0
9.0 to 10
Nickel (Ni), % 4.5 to 5.5
0 to 0.3
Niobium (Nb), % 0 to 0.35
0
Nitrogen (N), % 0 to 0.050
0
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0 to 1.0
0.15 to 0.65
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 0
1.2 to 1.9
Vanadium (V), % 0
1.0 to 1.4