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SAE-AISI M4 Steel vs. 50Cr-50Ni Alloy

SAE-AISI M4 steel belongs to the iron alloys classification, while 50Cr-50Ni alloy belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M4 steel and the bottom bar is 50Cr-50Ni alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Poisson's Ratio 0.29
0.26
Shear Modulus, GPa 76
84
Tensile Strength: Ultimate (UTS), MPa 770 to 2150
620

Thermal Properties

Latent Heat of Fusion, J/g 260
350
Specific Heat Capacity, J/kg-K 440
490
Thermal Expansion, µm/m-K 12
15

Otherwise Unclassified Properties

Base Metal Price, % relative 25
50
Density, g/cm3 8.3
8.0
Embodied Carbon, kg CO2/kg material 14
7.9
Embodied Energy, MJ/kg 210
110
Embodied Water, L/kg 110
350

Common Calculations

Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 26 to 72
21
Strength to Weight: Bending, points 23 to 45
20
Thermal Shock Resistance, points 24 to 68
14

Alloy Composition

Aluminum (Al), % 0
0 to 0.25
Carbon (C), % 1.3 to 1.4
0 to 0.1
Chromium (Cr), % 3.8 to 4.8
48 to 52
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 75.9 to 81.4
0 to 1.0
Manganese (Mn), % 0.15 to 0.4
0 to 0.3
Molybdenum (Mo), % 4.3 to 5.5
0
Nickel (Ni), % 0 to 0.3
44.5 to 52
Nitrogen (N), % 0
0 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.020
Silicon (Si), % 0.2 to 0.45
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.020
Titanium (Ti), % 0
0 to 0.5
Tungsten (W), % 5.3 to 6.5
0
Vanadium (V), % 3.8 to 4.5
0