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ACI-ASTM CG8M Steel vs. EN 1.1121 Steel

Both ACI-ASTM CG8M steel and EN 1.1121 steel are iron alloys. They have 65% of their average alloy composition in common. There are 30 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 ACI-ASTM CG8M steel and the bottom bar is EN 1.1121 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
120
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 45
28
Fatigue Strength, MPa 280
160
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 79
73
Tensile Strength: Ultimate (UTS), MPa 550
400
Tensile Strength: Yield (Proof), MPa 300
210

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1020
400
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 16
53
Thermal Expansion, µm/m-K 16
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 20
1.8
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 4.1
1.4
Embodied Energy, MJ/kg 56
18
Embodied Water, L/kg 160
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 210
93
Resilience: Unit (Modulus of Resilience), kJ/m3 220
110
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 19
14
Strength to Weight: Bending, points 19
15
Thermal Diffusivity, mm2/s 4.3
14
Thermal Shock Resistance, points 12
13

Alloy Composition

Carbon (C), % 0 to 0.080
0.070 to 0.13
Chromium (Cr), % 18 to 21
0
Iron (Fe), % 58.8 to 70
98.8 to 99.63
Manganese (Mn), % 0 to 1.5
0.3 to 0.6
Molybdenum (Mo), % 3.0 to 4.0
0
Nickel (Ni), % 9.0 to 13
0
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.5
0 to 0.4
Sulfur (S), % 0 to 0.040
0 to 0.035