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SAE-AISI L6 Steel vs. SAE-AISI O1 Steel

Both SAE-AISI L6 steel and SAE-AISI O1 steel are iron alloys. They have a very high 98% of their average alloy composition in common.

For each property being compared, the top bar is SAE-AISI L6 steel and the bottom bar is SAE-AISI O1 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
72
Tensile Strength: Ultimate (UTS), MPa 670 to 2090
640 to 2060

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 42
43
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
8.5

Otherwise Unclassified Properties

Base Metal Price, % relative 3.6
3.4
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.0
1.9
Embodied Energy, MJ/kg 28
27
Embodied Water, L/kg 54
51

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 24 to 74
23 to 73
Strength to Weight: Bending, points 22 to 46
21 to 46
Thermal Diffusivity, mm2/s 11
12
Thermal Shock Resistance, points 22 to 70
21 to 68

Alloy Composition

Carbon (C), % 0.65 to 0.75
0.85 to 1.0
Chromium (Cr), % 0.6 to 1.2
0.4 to 0.6
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 93.6 to 97.3
95 to 97.4
Manganese (Mn), % 0.25 to 0.8
1.0 to 1.4
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 1.3 to 2.0
0 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0 to 0.5
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 0
0.4 to 0.6
Vanadium (V), % 0 to 0.3
0 to 0.3

Comparable Variants