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SAE-AISI A7 Steel vs. R05252 Alloy

SAE-AISI A7 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 A7 steel and the bottom bar is R05252 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 72
73
Tensile Strength: Ultimate (UTS), MPa 800 to 2150
310

Thermal Properties

Latent Heat of Fusion, J/g 260
140
Specific Heat Capacity, J/kg-K 470
140
Thermal Expansion, µm/m-K 12
6.7

Otherwise Unclassified Properties

Density, g/cm3 7.7
17
Embodied Water, L/kg 100
600

Common Calculations

Stiffness to Weight: Axial, points 13
6.5
Stiffness to Weight: Bending, points 25
12
Strength to Weight: Axial, points 29 to 77
5.2
Strength to Weight: Bending, points 25 to 48
6.1
Thermal Shock Resistance, points 27 to 72
17

Alloy Composition

Carbon (C), % 2.0 to 2.9
0 to 0.010
Chromium (Cr), % 5.0 to 5.8
0
Copper (Cu), % 0 to 0.25
0
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 81.4 to 87.7
0 to 0.010
Manganese (Mn), % 0 to 0.8
0
Molybdenum (Mo), % 0.9 to 1.4
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 to 0.5
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), % 0.5 to 1.5
9.0 to 11
Vanadium (V), % 3.9 to 5.2
0