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SAE-AISI D4 Steel vs. Ductile Cast Iron

Both SAE-AISI D4 steel and ductile cast iron are iron alloys. They have 86% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI D4 steel and the bottom bar is ductile cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
170 to 180
Elongation at Break, % 8.4 to 15
2.1 to 20
Poisson's Ratio 0.28
0.28 to 0.31
Shear Modulus, GPa 74
64 to 70
Shear Strength, MPa 460 to 1210
420 to 800
Tensile Strength: Ultimate (UTS), MPa 760 to 2060
460 to 920
Tensile Strength: Yield (Proof), MPa 470 to 1540
310 to 670

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Melting Completion (Liquidus), °C 1430
1160
Melting Onset (Solidus), °C 1380
1120
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 31
31 to 36
Thermal Expansion, µm/m-K 12
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 4.2
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 5.0
8.8 to 9.4

Otherwise Unclassified Properties

Base Metal Price, % relative 8.0
1.9
Density, g/cm3 7.7
7.1 to 7.5
Embodied Carbon, kg CO2/kg material 3.3
1.5
Embodied Energy, MJ/kg 49
21
Embodied Water, L/kg 100
43

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100 to 160
17 to 80
Stiffness to Weight: Axial, points 14
12 to 14
Stiffness to Weight: Bending, points 25
24 to 26
Strength to Weight: Axial, points 27 to 75
17 to 35
Strength to Weight: Bending, points 24 to 47
18 to 29
Thermal Diffusivity, mm2/s 8.3
8.9 to 10
Thermal Shock Resistance, points 23 to 63
17 to 35

Alloy Composition

Carbon (C), % 2.1 to 2.4
3.0 to 3.5
Chromium (Cr), % 11 to 13
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 80.6 to 86.3
93.7 to 95.5
Manganese (Mn), % 0 to 0.6
0
Molybdenum (Mo), % 0.7 to 1.2
0
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.080
Silicon (Si), % 0 to 0.6
1.5 to 2.8
Sulfur (S), % 0 to 0.030
0
Vanadium (V), % 0 to 1.0
0

Comparable Variants