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ACI-ASTM CG8M Steel vs. AWS ER90S-D2

Both ACI-ASTM CG8M steel and AWS ER90S-D2 are iron alloys. They have 66% of their average alloy composition in common. 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 ACI-ASTM CG8M steel and the bottom bar is AWS ER90S-D2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 45
19
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 79
73
Tensile Strength: Ultimate (UTS), MPa 550
710
Tensile Strength: Yield (Proof), MPa 300
600

Thermal Properties

Latent Heat of Fusion, J/g 300
260
Melting Completion (Liquidus), °C 1450
1450
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 16
47
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
8.5

Otherwise Unclassified Properties

Base Metal Price, % relative 20
2.6
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 4.1
1.6
Embodied Energy, MJ/kg 56
21
Embodied Water, L/kg 160
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 210
130
Resilience: Unit (Modulus of Resilience), kJ/m3 220
980
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 19
25
Strength to Weight: Bending, points 19
23
Thermal Diffusivity, mm2/s 4.3
13
Thermal Shock Resistance, points 12
21

Alloy Composition

Carbon (C), % 0 to 0.080
0.070 to 0.12
Chromium (Cr), % 18 to 21
0
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 58.8 to 70
95.2 to 97.4
Manganese (Mn), % 0 to 1.5
1.6 to 2.1
Molybdenum (Mo), % 3.0 to 4.0
0.4 to 0.6
Nickel (Ni), % 9.0 to 13
0 to 0.15
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 1.5
0.5 to 0.8
Sulfur (S), % 0 to 0.040
0 to 0.025
Residuals, % 0
0 to 0.5