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SAE-AISI H25 Steel vs. Automotive Malleable Cast Iron

Both SAE-AISI H25 steel and automotive malleable cast iron are iron alloys. They have 80% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI H25 steel and the bottom bar is automotive malleable cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
180
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 79
70
Tensile Strength: Ultimate (UTS), MPa 710 to 1620
350 to 720

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Melting Completion (Liquidus), °C 1750
1410
Melting Onset (Solidus), °C 1700
1370
Specific Heat Capacity, J/kg-K 420
480
Thermal Conductivity, W/m-K 26
41
Thermal Expansion, µm/m-K 12
14

Otherwise Unclassified Properties

Base Metal Price, % relative 38
1.9
Density, g/cm3 9.1
7.6
Embodied Carbon, kg CO2/kg material 6.2
1.5
Embodied Energy, MJ/kg 93
20
Embodied Water, L/kg 83
45

Common Calculations

Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 22 to 50
13 to 26
Strength to Weight: Bending, points 20 to 34
14 to 24
Thermal Diffusivity, mm2/s 6.7
11
Thermal Shock Resistance, points 22 to 49
9.9 to 21

Alloy Composition

Carbon (C), % 0.22 to 0.32
2.2 to 2.9
Chromium (Cr), % 3.8 to 4.5
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 77.2 to 81.3
93.6 to 96.7
Manganese (Mn), % 0.15 to 0.4
0.15 to 1.3
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0.020 to 0.15
Silicon (Si), % 0.15 to 0.4
0.9 to 1.9
Sulfur (S), % 0 to 0.030
0.020 to 0.2
Tungsten (W), % 14 to 16
0
Vanadium (V), % 0.4 to 0.6
0

Comparable Variants