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Grade FDSiCr Steel vs. SAE-AISI M4 Steel

Both grade FDSiCr steel and SAE-AISI M4 steel are iron alloys. They have 81% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is grade FDSiCr steel and the bottom bar is SAE-AISI M4 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 80
76
Tensile Strength: Ultimate (UTS), MPa 1930
770 to 2150

Thermal Properties

Latent Heat of Fusion, J/g 270
260
Melting Completion (Liquidus), °C 1440
1610
Melting Onset (Solidus), °C 1400
1560
Specific Heat Capacity, J/kg-K 480
440
Thermal Conductivity, W/m-K 48
25
Thermal Expansion, µm/m-K 13
12

Otherwise Unclassified Properties

Base Metal Price, % relative 2.2
25
Density, g/cm3 7.7
8.3
Embodied Carbon, kg CO2/kg material 1.5
14
Embodied Energy, MJ/kg 20
210
Embodied Water, L/kg 48
110

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 69
26 to 72
Strength to Weight: Bending, points 44
23 to 45
Thermal Diffusivity, mm2/s 13
6.9
Thermal Shock Resistance, points 58
24 to 68

Alloy Composition

Carbon (C), % 0.5 to 0.6
1.3 to 1.4
Chromium (Cr), % 0.5 to 0.8
3.8 to 4.8
Copper (Cu), % 0 to 0.12
0 to 0.25
Iron (Fe), % 96.5 to 97.8
75.9 to 81.4
Manganese (Mn), % 0.5 to 0.9
0.15 to 0.4
Molybdenum (Mo), % 0
4.3 to 5.5
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 1.2 to 1.6
0.2 to 0.45
Sulfur (S), % 0 to 0.025
0 to 0.030
Tungsten (W), % 0
5.3 to 6.5
Vanadium (V), % 0
3.8 to 4.5