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ASTM A387 Grade 9 Steel vs. ASTM A27 Cast Steel

Both ASTM A387 grade 9 steel and ASTM A27 cast 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 A387 grade 9 steel and the bottom bar is ASTM A27 cast steel.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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