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SAE-AISI M4 Steel vs. R05252 Alloy

SAE-AISI M4 steel belongs to the iron alloys classification, while R05252 alloy belongs to the otherwise unclassified metals. There are 14 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is SAE-AISI M4 steel and the bottom bar is R05252 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 76
73
Tensile Strength: Ultimate (UTS), MPa 770 to 2150
310

Thermal Properties

Latent Heat of Fusion, J/g 260
140
Specific Heat Capacity, J/kg-K 440
140
Thermal Expansion, µm/m-K 12
6.7

Otherwise Unclassified Properties

Density, g/cm3 8.3
17
Embodied Water, L/kg 110
600

Common Calculations

Stiffness to Weight: Axial, points 13
6.5
Stiffness to Weight: Bending, points 23
12
Strength to Weight: Axial, points 26 to 72
5.2
Strength to Weight: Bending, points 23 to 45
6.1
Thermal Shock Resistance, points 24 to 68
17

Alloy Composition

Carbon (C), % 1.3 to 1.4
0 to 0.010
Chromium (Cr), % 3.8 to 4.8
0
Copper (Cu), % 0 to 0.25
0
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 75.9 to 81.4
0 to 0.010
Manganese (Mn), % 0.15 to 0.4
0
Molybdenum (Mo), % 4.3 to 5.5
0 to 0.020
Nickel (Ni), % 0 to 0.3
0 to 0.010
Niobium (Nb), % 0
0 to 0.1
Nitrogen (N), % 0
0 to 0.010
Oxygen (O), % 0
0 to 0.015
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.2 to 0.45
0 to 0.0050
Sulfur (S), % 0 to 0.030
0
Tantalum (Ta), % 0
88.8 to 91
Titanium (Ti), % 0
0 to 0.010
Tungsten (W), % 5.3 to 6.5
9.0 to 11
Vanadium (V), % 3.8 to 4.5
0