Grey Cast Iron vs. SAE-AISI H41 Steel

Both grey cast iron and SAE-AISI H41 steel are iron alloys. They have 85% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is grey cast iron and the bottom bar is SAE-AISI H41 steel.

Grey Cast Iron SAE-AISI H41 (T20841) Molybdenum Hot-Work Steel

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		180
Elastic (Young's, Tensile) Modulus, GPa		200

Poisson's Ratio		0.29
Poisson's Ratio		0.29

Shear Modulus, GPa		69
Shear Modulus, GPa		77

Tensile Strength: Ultimate (UTS), MPa		160 to 450
Tensile Strength: Ultimate (UTS), MPa		710 to 2210

Thermal Properties

Latent Heat of Fusion, J/g		280
Latent Heat of Fusion, J/g		270

Melting Completion (Liquidus), °C		1380
Melting Completion (Liquidus), °C		1560

Melting Onset (Solidus), °C		1180
Melting Onset (Solidus), °C		1510

Specific Heat Capacity, J/kg-K		490
Specific Heat Capacity, J/kg-K		450

Thermal Conductivity, W/m-K		46
Thermal Conductivity, W/m-K		28

Thermal Expansion, µm/m-K		11
Thermal Expansion, µm/m-K		12

Otherwise Unclassified Properties

Base Metal Price, % relative		1.9
Base Metal Price, % relative		18

Density, g/cm³		7.5
Density, g/cm³		8.1

Embodied Carbon, kg CO₂/kg material		1.5
Embodied Carbon, kg CO₂/kg material		6.8

Embodied Energy, MJ/kg		21
Embodied Energy, MJ/kg		97

Embodied Water, L/kg		44
Embodied Water, L/kg		97

Common Calculations

Stiffness to Weight: Axial, points		13
Stiffness to Weight: Axial, points		14

Stiffness to Weight: Bending, points		25
Stiffness to Weight: Bending, points		24

Strength to Weight: Axial, points		5.8 to 17
Strength to Weight: Axial, points		24 to 76

Strength to Weight: Bending, points		8.7 to 17
Strength to Weight: Bending, points		22 to 47

Thermal Diffusivity, mm²/s		13
Thermal Diffusivity, mm²/s		7.7

Thermal Shock Resistance, points		6.0 to 17
Thermal Shock Resistance, points		20 to 64

Alloy Composition

Carbon (C), %		3.1 to 3.4
Carbon (C), %		0.6 to 0.75

Chromium (Cr), %		0
Chromium (Cr), %		3.5 to 4.0

Iron (Fe), %		92.1 to 93.9
Iron (Fe), %		81.8 to 85

Manganese (Mn), %		0.5 to 0.7
Manganese (Mn), %		0.15 to 0.4

Molybdenum (Mo), %		0
Molybdenum (Mo), %		8.2 to 9.2

Phosphorus (P), %		0 to 0.9
Phosphorus (P), %		0 to 0.030

Silicon (Si), %		2.5 to 2.8
Silicon (Si), %		0.2 to 0.45

Sulfur (S), %		0 to 0.15
Sulfur (S), %		0 to 0.030

Tungsten (W), %		0
Tungsten (W), %		1.4 to 2.1

Vanadium (V), %		0
Vanadium (V), %		1.0 to 1.3