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SAE-AISI M7 Steel vs. R05200 Tantalum

SAE-AISI M7 steel belongs to the iron alloys classification, while R05200 tantalum belongs to the otherwise unclassified metals. There are 16 material properties with values for both materials. Properties with values for just one material (10, 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 M7 steel and the bottom bar is R05200 tantalum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 77
69
Tensile Strength: Ultimate (UTS), MPa 760 to 2210
210 to 540

Thermal Properties

Latent Heat of Fusion, J/g 270
140
Specific Heat Capacity, J/kg-K 450
140
Thermal Conductivity, W/m-K 28
59
Thermal Expansion, µm/m-K 12
6.5

Otherwise Unclassified Properties

Density, g/cm3 8.1
17
Embodied Water, L/kg 100
650

Common Calculations

Stiffness to Weight: Axial, points 14
6.2
Stiffness to Weight: Bending, points 24
11
Strength to Weight: Axial, points 26 to 76
3.6 to 9.0
Strength to Weight: Bending, points 23 to 47
4.8 to 8.8
Thermal Diffusivity, mm2/s 7.8
25
Thermal Shock Resistance, points 24 to 69
13 to 32

Alloy Composition

Carbon (C), % 1.0 to 1.1
0 to 0.010
Chromium (Cr), % 3.5 to 4.0
0
Copper (Cu), % 0 to 0.25
0
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 79.8 to 83.8
0 to 0.010
Manganese (Mn), % 0.15 to 0.4
0
Molybdenum (Mo), % 8.2 to 9.2
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 0.55
0 to 0.0050
Sulfur (S), % 0 to 0.030
0
Tantalum (Ta), % 0
99.8 to 100
Titanium (Ti), % 0
0 to 0.010
Tungsten (W), % 1.4 to 2.1
0 to 0.050
Vanadium (V), % 1.8 to 2.3
0

Comparable Variants