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ASTM A27 Cast Steel vs. ASTM A387 Grade 9 Steel

Both ASTM A27 cast steel and ASTM A387 grade 9 steel are iron alloys. There are 29 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 A27 cast steel and the bottom bar is ASTM A387 grade 9 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 25 to 27
20 to 21
Fatigue Strength, MPa 170 to 230
160 to 240
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
75
Tensile Strength: Ultimate (UTS), MPa 460 to 550
500 to 600
Tensile Strength: Yield (Proof), MPa 230 to 310
230 to 350

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Maximum Temperature: Mechanical, °C 400
600
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 52
26
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0 to 7.1
9.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
10

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
6.5
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
2.1
Embodied Energy, MJ/kg 18
28
Embodied Water, L/kg 45 to 46
87

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 96 to 120
83 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 260
140 to 310
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 16 to 20
18 to 21
Strength to Weight: Bending, points 17 to 19
18 to 20
Thermal Diffusivity, mm2/s 14
6.9
Thermal Shock Resistance, points 15 to 18
14 to 17