MakeItFrom.com
Menu (ESC)

SAE-AISI H21 Steel vs. Automotive Malleable Cast Iron

Both SAE-AISI H21 steel and automotive malleable cast iron are iron alloys. They have a moderately high 92% 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 H21 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 76
70
Tensile Strength: Ultimate (UTS), MPa 720 to 1790
350 to 720

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Melting Completion (Liquidus), °C 1630
1410
Melting Onset (Solidus), °C 1580
1370
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 27
41
Thermal Expansion, µm/m-K 11
14

Otherwise Unclassified Properties

Base Metal Price, % relative 23
1.9
Density, g/cm3 8.5
7.6
Embodied Carbon, kg CO2/kg material 4.5
1.5
Embodied Energy, MJ/kg 68
20
Embodied Water, L/kg 72
45

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 23 to 58
13 to 26
Strength to Weight: Bending, points 21 to 38
14 to 24
Thermal Diffusivity, mm2/s 7.1
11
Thermal Shock Resistance, points 24 to 59
9.9 to 21

Alloy Composition

Carbon (C), % 0.28 to 0.36
2.2 to 2.9
Chromium (Cr), % 3.0 to 3.8
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 87.6 to 93.8
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 0.5
0.9 to 1.9
Sulfur (S), % 0 to 0.030
0.020 to 0.2
Tungsten (W), % 8.5 to 10
0
Vanadium (V), % 0.3 to 0.6
0

Comparable Variants