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ASTM Grade HD Steel vs. Ductile Cast Iron

Both ASTM grade HD steel and ductile cast iron are iron alloys. They have 65% of their average alloy composition in common. There are 28 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 ASTM grade HD steel and the bottom bar is ductile cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
170 to 180
Elongation at Break, % 9.1
2.1 to 20
Poisson's Ratio 0.27
0.28 to 0.31
Shear Modulus, GPa 80
64 to 70
Tensile Strength: Ultimate (UTS), MPa 590
460 to 920
Tensile Strength: Yield (Proof), MPa 270
310 to 670

Thermal Properties

Latent Heat of Fusion, J/g 310
270
Maximum Temperature: Mechanical, °C 1100
290
Melting Completion (Liquidus), °C 1410
1160
Melting Onset (Solidus), °C 1370
1120
Specific Heat Capacity, J/kg-K 490
490
Thermal Conductivity, W/m-K 16
31 to 36
Thermal Expansion, µm/m-K 11
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.8 to 9.4

Otherwise Unclassified Properties

Base Metal Price, % relative 17
1.9
Density, g/cm3 7.7
7.1 to 7.5
Embodied Carbon, kg CO2/kg material 3.1
1.5
Embodied Energy, MJ/kg 45
21
Embodied Water, L/kg 180
43

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 44
17 to 80
Resilience: Unit (Modulus of Resilience), kJ/m3 180
280 to 1330
Stiffness to Weight: Axial, points 15
12 to 14
Stiffness to Weight: Bending, points 26
24 to 26
Strength to Weight: Axial, points 21
17 to 35
Strength to Weight: Bending, points 20
18 to 29
Thermal Diffusivity, mm2/s 4.3
8.9 to 10
Thermal Shock Resistance, points 19
17 to 35

Alloy Composition

Carbon (C), % 0 to 0.5
3.0 to 3.5
Chromium (Cr), % 26 to 30
0
Iron (Fe), % 58.4 to 70
93.7 to 95.5
Manganese (Mn), % 0 to 1.5
0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 4.0 to 7.0
0
Phosphorus (P), % 0 to 0.040
0 to 0.080
Silicon (Si), % 0 to 2.0
1.5 to 2.8
Sulfur (S), % 0 to 0.040
0