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SAE-AISI H25 Steel vs. Automotive Grey Cast Iron

Both SAE-AISI H25 steel and automotive grey cast iron are iron alloys. 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 grey 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
69 to 70
Tensile Strength: Ultimate (UTS), MPa 710 to 1620
140 to 290

Thermal Properties

Latent Heat of Fusion, J/g 250
260 to 280
Melting Completion (Liquidus), °C 1750
1380 to 1390
Melting Onset (Solidus), °C 1700
1340 to 1350
Specific Heat Capacity, J/kg-K 420
490
Thermal Conductivity, W/m-K 26
41 to 43
Thermal Expansion, µm/m-K 12
12 to 14

Otherwise Unclassified Properties

Base Metal Price, % relative 38
1.9 to 3.0
Density, g/cm3 9.1
7.5 to 7.6
Embodied Carbon, kg CO2/kg material 6.2
1.5 to 1.7
Embodied Energy, MJ/kg 93
21 to 24
Embodied Water, L/kg 83
44 to 51

Common Calculations

Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 22 to 50
5.2 to 11
Strength to Weight: Bending, points 20 to 34
8.0 to 13
Thermal Diffusivity, mm2/s 6.7
11 to 12
Thermal Shock Resistance, points 22 to 49
4.2 to 8.6