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SAE-AISI M2 Steel vs. ACI-ASTM CK20 Steel

Both SAE-AISI M2 steel and ACI-ASTM CK20 steel are iron alloys. They have 58% 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 CK20 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
78
Tensile Strength: Ultimate (UTS), MPa 760 to 2150
530

Thermal Properties

Latent Heat of Fusion, J/g 260
310
Melting Completion (Liquidus), °C 1610
1400
Melting Onset (Solidus), °C 1570
1430
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 22
14
Thermal Expansion, µm/m-K 10
15

Otherwise Unclassified Properties

Base Metal Price, % relative 24
25
Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 8.8
4.4
Embodied Energy, MJ/kg 130
62
Embodied Water, L/kg 98
190

Common Calculations

PREN (Pitting Resistance) 31
26
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
3.7
Thermal Shock Resistance, points 27 to 76
13

Alloy Composition

Carbon (C), % 0.78 to 1.1
0 to 0.2
Chromium (Cr), % 3.8 to 4.5
23 to 27
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 78.5 to 83.4
46.7 to 58
Manganese (Mn), % 0.15 to 0.4
0 to 2.0
Molybdenum (Mo), % 4.5 to 5.5
0 to 0.5
Nickel (Ni), % 0 to 0.3
19 to 22
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