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ASTM Grade LC9 Steel vs. SAE-AISI 5155 Steel

Both ASTM grade LC9 steel and SAE-AISI 5155 steel are iron alloys. They have a moderately high 90% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is ASTM grade LC9 steel and the bottom bar is SAE-AISI 5155 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
190
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 22
21
Fatigue Strength, MPa 420
260
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 660
620
Tensile Strength: Yield (Proof), MPa 590
380

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 430
420
Melting Completion (Liquidus), °C 1450
1450
Melting Onset (Solidus), °C 1410
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.9
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 10
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 8.0
2.1
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 2.3
1.4
Embodied Energy, MJ/kg 31
19
Embodied Water, L/kg 65
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
110
Resilience: Unit (Modulus of Resilience), kJ/m3 920
380
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23
22
Strength to Weight: Bending, points 21
21
Thermal Shock Resistance, points 20
20

Alloy Composition

Carbon (C), % 0 to 0.13
0.51 to 0.59
Chromium (Cr), % 0 to 0.5
0.7 to 0.9
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 87.4 to 91.5
97.2 to 97.9
Manganese (Mn), % 0 to 0.9
0.7 to 0.9
Molybdenum (Mo), % 0 to 0.2
0
Nickel (Ni), % 8.5 to 10
0
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 0.45
0.15 to 0.35
Sulfur (S), % 0 to 0.045
0 to 0.040
Vanadium (V), % 0 to 0.030
0