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SAE-AISI M1 Steel vs. SAE-AISI O1 Steel

Both SAE-AISI M1 steel and SAE-AISI O1 steel are iron alloys. They have 86% 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 M1 steel and the bottom bar is SAE-AISI O1 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 77
72
Tensile Strength: Ultimate (UTS), MPa 730 to 2140
640 to 2060

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Melting Completion (Liquidus), °C 1560
1460
Melting Onset (Solidus), °C 1510
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 29
43
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 18
3.4
Density, g/cm3 8.1
7.8
Embodied Carbon, kg CO2/kg material 7.0
1.9
Embodied Energy, MJ/kg 99
27
Embodied Water, L/kg 98
51

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 25 to 73
23 to 73
Strength to Weight: Bending, points 22 to 45
21 to 46
Thermal Diffusivity, mm2/s 8.0
12
Thermal Shock Resistance, points 23 to 66
21 to 68

Alloy Composition

Carbon (C), % 0.78 to 0.88
0.85 to 1.0
Chromium (Cr), % 3.5 to 4.0
0.4 to 0.6
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 81 to 84.8
95 to 97.4
Manganese (Mn), % 0.15 to 0.4
1.0 to 1.4
Molybdenum (Mo), % 8.2 to 9.2
0
Nickel (Ni), % 0 to 0.3
0 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.2 to 0.5
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 1.4 to 2.1
0.4 to 0.6
Vanadium (V), % 1.0 to 1.4
0 to 0.3

Comparable Variants