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SAE-AISI O2 Steel vs. SAE-AISI M1 Steel

Both SAE-AISI O2 steel and SAE-AISI M1 steel are iron alloys. They have 85% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI O2 steel and the bottom bar is SAE-AISI M1 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
77
Tensile Strength: Ultimate (UTS), MPa 640 to 2050
730 to 2140

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Melting Completion (Liquidus), °C 1450
1560
Melting Onset (Solidus), °C 1410
1510
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 43
29
Thermal Expansion, µm/m-K 11
12

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
18
Density, g/cm3 7.8
8.1
Embodied Carbon, kg CO2/kg material 1.8
7.0
Embodied Energy, MJ/kg 26
99
Embodied Water, L/kg 50
98

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23 to 73
25 to 73
Strength to Weight: Bending, points 21 to 46
22 to 45
Thermal Diffusivity, mm2/s 12
8.0
Thermal Shock Resistance, points 22 to 70
23 to 66

Alloy Composition

Carbon (C), % 0.85 to 1.0
0.78 to 0.88
Chromium (Cr), % 0 to 0.5
3.5 to 4.0
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 95 to 97.8
81 to 84.8
Manganese (Mn), % 1.4 to 1.8
0.15 to 0.4
Molybdenum (Mo), % 0 to 0.3
8.2 to 9.2
Nickel (Ni), % 0 to 0.3
0 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0 to 0.5
0.2 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 0
1.4 to 2.1
Vanadium (V), % 0 to 0.3
1.0 to 1.4

Comparable Variants