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SAE-AISI M2 Steel vs. ACI-ASTM CB7Cu-2 Steel

Both SAE-AISI M2 steel and ACI-ASTM CB7Cu-2 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 SAE-AISI M2 steel and the bottom bar is ACI-ASTM CB7Cu-2 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 77
75
Tensile Strength: Ultimate (UTS), MPa 760 to 2150
960 to 1350

Thermal Properties

Latent Heat of Fusion, J/g 260
280
Melting Completion (Liquidus), °C 1610
1430
Melting Onset (Solidus), °C 1570
1380
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 22
17
Thermal Expansion, µm/m-K 10
11

Otherwise Unclassified Properties

Base Metal Price, % relative 24
13
Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 8.8
2.6
Embodied Energy, MJ/kg 130
38
Embodied Water, L/kg 98
130

Common Calculations

PREN (Pitting Resistance) 31
15
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 25 to 71
34 to 48
Strength to Weight: Bending, points 22 to 44
28 to 35
Thermal Diffusivity, mm2/s 5.9
4.6
Thermal Shock Resistance, points 27 to 76
32 to 45

Alloy Composition

Carbon (C), % 0.78 to 1.1
0 to 0.070
Chromium (Cr), % 3.8 to 4.5
14 to 15.5
Copper (Cu), % 0 to 0.25
2.5 to 3.2
Iron (Fe), % 78.5 to 83.4
73.6 to 79
Manganese (Mn), % 0.15 to 0.4
0 to 0.7
Molybdenum (Mo), % 4.5 to 5.5
0
Nickel (Ni), % 0 to 0.3
4.5 to 5.5
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), % 0.2 to 0.45
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 5.5 to 6.8
0
Vanadium (V), % 1.8 to 2.2
0