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SAE-AISI 8645 Steel vs. Grade FDCrV Steel

Both SAE-AISI 8645 steel and grade FDCrV steel are iron alloys. Their average alloy composition is basically identical. There are 25 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 8645 steel and the bottom bar is grade FDCrV steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 200
540
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
80
Tensile Strength: Ultimate (UTS), MPa 600 to 670
1800

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 410
410
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 39
48
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
2.1
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.9
Embodied Energy, MJ/kg 20
26
Embodied Water, L/kg 50
49

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21 to 24
64
Strength to Weight: Bending, points 20 to 22
42
Thermal Diffusivity, mm2/s 10
13
Thermal Shock Resistance, points 18 to 20
53

Alloy Composition

Carbon (C), % 0.43 to 0.48
0.62 to 0.72
Chromium (Cr), % 0.4 to 0.6
0.4 to 0.6
Copper (Cu), % 0
0 to 0.12
Iron (Fe), % 96.5 to 97.7
97.8 to 98.8
Manganese (Mn), % 0.75 to 1.0
0.5 to 0.9
Molybdenum (Mo), % 0.15 to 0.25
0
Nickel (Ni), % 0.4 to 0.7
0
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0.15 to 0.35
0.15 to 0.3
Sulfur (S), % 0 to 0.040
0 to 0.025
Vanadium (V), % 0
0.15 to 0.25