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SAE-AISI M2 Steel vs. ACI-ASTM CF8C Steel

Both SAE-AISI M2 steel and ACI-ASTM CF8C steel are iron alloys. They have 73% of their average alloy composition in common. There are 22 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 M2 steel and the bottom bar is ACI-ASTM CF8C steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 77
77
Tensile Strength: Ultimate (UTS), MPa 760 to 2150
530

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Melting Completion (Liquidus), °C 1610
1420
Melting Onset (Solidus), °C 1570
1430
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 22
16
Thermal Expansion, µm/m-K 10
17

Otherwise Unclassified Properties

Base Metal Price, % relative 24
19
Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 8.8
3.7
Embodied Energy, MJ/kg 130
53
Embodied Water, L/kg 98
150

Common Calculations

PREN (Pitting Resistance) 31
20
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 25 to 71
19
Strength to Weight: Bending, points 22 to 44
19
Thermal Diffusivity, mm2/s 5.9
4.3
Thermal Shock Resistance, points 27 to 76
11

Alloy Composition

Carbon (C), % 0.78 to 1.1
0 to 0.080
Chromium (Cr), % 3.8 to 4.5
18 to 21
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 78.5 to 83.4
61.8 to 73
Manganese (Mn), % 0.15 to 0.4
0 to 1.5
Molybdenum (Mo), % 4.5 to 5.5
0 to 0.5
Nickel (Ni), % 0 to 0.3
9.0 to 12
Niobium (Nb), % 0
0 to 1.0
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.2 to 0.45
0 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.040
Tungsten (W), % 5.5 to 6.8
0
Vanadium (V), % 1.8 to 2.2
0