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ASTM A27 Cast Steel vs. SAE-AISI 4340M Steel

Both ASTM A27 cast steel and SAE-AISI 4340M steel are iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is ASTM A27 cast steel and the bottom bar is SAE-AISI 4340M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 25 to 27
6.0
Fatigue Strength, MPa 170 to 230
690
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
72
Tensile Strength: Ultimate (UTS), MPa 460 to 550
2340
Tensile Strength: Yield (Proof), MPa 230 to 310
1240

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 400
430
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 52
38
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0 to 7.1
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
3.9
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.9
Embodied Energy, MJ/kg 18
26
Embodied Water, L/kg 45 to 46
55

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 96 to 120
120
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 260
4120
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 16 to 20
84
Strength to Weight: Bending, points 17 to 19
51
Thermal Diffusivity, mm2/s 14
10
Thermal Shock Resistance, points 15 to 18
70