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ASTM A387 Grade 5 Steel vs. Automotive Grey Cast Iron

Both ASTM A387 grade 5 steel and automotive grey cast iron are iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 5 steel and the bottom bar is automotive grey cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
160 to 280
Elastic (Young's, Tensile) Modulus, GPa 190
180
Elongation at Break, % 20 to 21
9.6 to 14
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
69 to 70
Tensile Strength: Ultimate (UTS), MPa 500 to 600
140 to 290
Tensile Strength: Yield (Proof), MPa 230 to 350
94 to 200

Thermal Properties

Latent Heat of Fusion, J/g 260
260 to 280
Melting Completion (Liquidus), °C 1460
1380 to 1390
Melting Onset (Solidus), °C 1420
1340 to 1350
Specific Heat Capacity, J/kg-K 470
490
Thermal Conductivity, W/m-K 40
41 to 43
Thermal Expansion, µm/m-K 13
12 to 14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.0
7.4 to 7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 9.2
8.8 to 9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 4.3
1.9 to 3.0
Density, g/cm3 7.8
7.5 to 7.6
Embodied Carbon, kg CO2/kg material 1.7
1.5 to 1.7
Embodied Energy, MJ/kg 23
21 to 24
Embodied Water, L/kg 69
44 to 51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 83 to 110
18 to 25
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
25 to 110
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18 to 21
5.2 to 11
Strength to Weight: Bending, points 18 to 20
8.0 to 13
Thermal Diffusivity, mm2/s 11
11 to 12
Thermal Shock Resistance, points 14 to 17
4.2 to 8.6