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SAE-AISI M2 Steel vs. ACI-ASTM CA15 Steel

Both SAE-AISI M2 steel and ACI-ASTM CA15 steel are iron alloys. They have 86% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (11, 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 CA15 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
76
Tensile Strength: Ultimate (UTS), MPa 760 to 2150
700

Thermal Properties

Latent Heat of Fusion, J/g 260
280
Melting Completion (Liquidus), °C 1610
1440
Melting Onset (Solidus), °C 1570
1500
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 22
25
Thermal Expansion, µm/m-K 10
10

Otherwise Unclassified Properties

Base Metal Price, % relative 24
7.5
Density, g/cm3 8.4
7.7
Embodied Carbon, kg CO2/kg material 8.8
2.0
Embodied Energy, MJ/kg 130
28
Embodied Water, L/kg 98
100

Common Calculations

PREN (Pitting Resistance) 31
14
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 25 to 71
25
Strength to Weight: Bending, points 22 to 44
23
Thermal Diffusivity, mm2/s 5.9
6.7
Thermal Shock Resistance, points 27 to 76
26

Alloy Composition

Carbon (C), % 0.78 to 1.1
0 to 0.15
Chromium (Cr), % 3.8 to 4.5
11.5 to 14
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 78.5 to 83.4
81.8 to 88.5
Manganese (Mn), % 0.15 to 0.4
0 to 1.0
Molybdenum (Mo), % 4.5 to 5.5
0 to 0.5
Nickel (Ni), % 0 to 0.3
0 to 1.0
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.2 to 0.45
0 to 1.5
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