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ASTM A27 Cast Steel vs. ACI-ASTM CN7MS Steel

Both ASTM A27 cast steel and ACI-ASTM CN7MS steel are iron alloys. There are 27 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 A27 cast steel and the bottom bar is ACI-ASTM CN7MS steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 25 to 27
39
Fatigue Strength, MPa 170 to 230
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Tensile Strength: Ultimate (UTS), MPa 460 to 550
540
Tensile Strength: Yield (Proof), MPa 230 to 310
230

Thermal Properties

Latent Heat of Fusion, J/g 250
340
Maximum Temperature: Mechanical, °C 400
1040
Melting Completion (Liquidus), °C 1460
1400
Melting Onset (Solidus), °C 1420
1350
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 52
12
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
28
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.4
5.1
Embodied Energy, MJ/kg 18
71
Embodied Water, L/kg 45 to 46
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 96 to 120
170
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 260
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 16 to 20
19
Strength to Weight: Bending, points 17 to 19
19
Thermal Diffusivity, mm2/s 14
3.2
Thermal Shock Resistance, points 15 to 18
13