MakeItFrom.com
Menu (ESC)

2025 Aluminum vs. ASTM Grade HI Steel

2025 aluminum belongs to the aluminum alloys classification, while ASTM grade HI steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, 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 2025 aluminum and the bottom bar is ASTM grade HI steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 110
160
Elastic (Young's, Tensile) Modulus, GPa 72
200
Elongation at Break, % 15
11
Fatigue Strength, MPa 130
150
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 27
79
Tensile Strength: Ultimate (UTS), MPa 400
550
Tensile Strength: Yield (Proof), MPa 260
270

Thermal Properties

Latent Heat of Fusion, J/g 400
310
Maximum Temperature: Mechanical, °C 190
1100
Melting Completion (Liquidus), °C 640
1400
Melting Onset (Solidus), °C 520
1350
Specific Heat Capacity, J/kg-K 870
490
Thermal Conductivity, W/m-K 150
15
Thermal Expansion, µm/m-K 23
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 120
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 10
23
Density, g/cm3 3.0
7.8
Embodied Carbon, kg CO2/kg material 7.9
4.1
Embodied Energy, MJ/kg 150
59
Embodied Water, L/kg 1130
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 55
52
Resilience: Unit (Modulus of Resilience), kJ/m3 450
180
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 37
20
Strength to Weight: Bending, points 40
19
Thermal Diffusivity, mm2/s 58
3.9
Thermal Shock Resistance, points 18
12

Alloy Composition

Aluminum (Al), % 90.9 to 95.2
0
Carbon (C), % 0
0.2 to 0.5
Chromium (Cr), % 0 to 0.1
26 to 30
Copper (Cu), % 3.9 to 5.0
0
Iron (Fe), % 0 to 1.0
46.9 to 59.8
Magnesium (Mg), % 0 to 0.050
0
Manganese (Mn), % 0.4 to 1.2
0 to 2.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0
14 to 18
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0.5 to 1.2
0 to 2.0
Sulfur (S), % 0
0 to 0.040
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0