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ASTM A372 Grade M Steel vs. 6151 Aluminum

ASTM A372 grade M steel belongs to the iron alloys classification, while 6151 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, 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 ASTM A372 grade M steel and the bottom bar is 6151 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
69
Elongation at Break, % 18 to 21
1.1 to 5.7
Fatigue Strength, MPa 450 to 520
80 to 100
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
26
Shear Strength, MPa 510 to 570
190 to 200
Tensile Strength: Ultimate (UTS), MPa 810 to 910
330 to 340
Tensile Strength: Yield (Proof), MPa 660 to 770
270 to 280

Thermal Properties

Latent Heat of Fusion, J/g 250
410
Maximum Temperature: Mechanical, °C 450
170
Melting Completion (Liquidus), °C 1460
650
Melting Onset (Solidus), °C 1420
590
Specific Heat Capacity, J/kg-K 470
900
Thermal Conductivity, W/m-K 46
170
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.0
45
Electrical Conductivity: Equal Weight (Specific), % IACS 9.1
150

Otherwise Unclassified Properties

Base Metal Price, % relative 5.0
9.5
Density, g/cm3 7.9
2.7
Embodied Carbon, kg CO2/kg material 2.0
8.2
Embodied Energy, MJ/kg 27
150
Embodied Water, L/kg 61
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
3.5 to 18
Resilience: Unit (Modulus of Resilience), kJ/m3 1140 to 1580
520 to 580
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 29 to 32
34
Strength to Weight: Bending, points 24 to 27
39
Thermal Diffusivity, mm2/s 12
70
Thermal Shock Resistance, points 24 to 27
15

Alloy Composition

Aluminum (Al), % 0
95.6 to 98.8
Carbon (C), % 0 to 0.23
0
Chromium (Cr), % 1.5 to 2.0
0.15 to 0.35
Copper (Cu), % 0
0 to 0.35
Iron (Fe), % 92.5 to 95.1
0 to 1.0
Magnesium (Mg), % 0
0.45 to 0.8
Manganese (Mn), % 0.2 to 0.4
0 to 0.2
Molybdenum (Mo), % 0.4 to 0.6
0
Nickel (Ni), % 2.8 to 3.9
0
Phosphorus (P), % 0 to 0.015
0
Silicon (Si), % 0 to 0.3
0.6 to 1.2
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0
0 to 0.15
Vanadium (V), % 0 to 0.080
0
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15

Comparable Variants