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ASTM A387 Grade 2 Steel vs. ACI-ASTM CE8MN Steel

Both ASTM A387 grade 2 steel and ACI-ASTM CE8MN steel are iron alloys. They have 63% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 2 steel and the bottom bar is ACI-ASTM CE8MN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 25
29
Fatigue Strength, MPa 190 to 250
370
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
80
Tensile Strength: Ultimate (UTS), MPa 470 to 550
750
Tensile Strength: Yield (Proof), MPa 260 to 350
500

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 420
1100
Melting Completion (Liquidus), °C 1470
1440
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 45
16
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
21
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.6
4.2
Embodied Energy, MJ/kg 20
58
Embodied Water, L/kg 50
180

Common Calculations

PREN (Pitting Resistance) 2.4
40
Resilience: Ultimate (Unit Rupture Work), MJ/m3 98 to 120
190
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 320
620
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 16 to 20
27
Strength to Weight: Bending, points 17 to 19
23
Thermal Diffusivity, mm2/s 12
4.2
Thermal Shock Resistance, points 14 to 16
21

Alloy Composition

Carbon (C), % 0.050 to 0.21
0 to 0.080
Chromium (Cr), % 0.5 to 0.8
22.5 to 25.5
Iron (Fe), % 97.1 to 98.3
56 to 66.4
Manganese (Mn), % 0.55 to 0.8
0 to 1.0
Molybdenum (Mo), % 0.45 to 0.6
3.0 to 4.5
Nickel (Ni), % 0
8.0 to 11
Nitrogen (N), % 0
0.1 to 0.3
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0.15 to 0.4
0 to 1.5
Sulfur (S), % 0 to 0.025
0 to 0.040