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ASTM A387 Grade 11 Steel vs. ACI-ASTM CH20 Steel

Both ASTM A387 grade 11 steel and ACI-ASTM CH20 steel are iron alloys. They have 63% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 11 steel and the bottom bar is ACI-ASTM CH20 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 25
38
Fatigue Strength, MPa 200 to 250
290
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
78
Tensile Strength: Ultimate (UTS), MPa 500 to 600
610
Tensile Strength: Yield (Proof), MPa 270 to 350
350

Thermal Properties

Latent Heat of Fusion, J/g 260
310
Maximum Temperature: Mechanical, °C 430
1100
Melting Completion (Liquidus), °C 1460
1410
Melting Onset (Solidus), °C 1420
1430
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 39
14
Thermal Expansion, µm/m-K 13
15

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
20
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.6
3.7
Embodied Energy, MJ/kg 21
53
Embodied Water, L/kg 53
180

Common Calculations

PREN (Pitting Resistance) 3.1
25
Resilience: Ultimate (Unit Rupture Work), MJ/m3 100 to 130
200
Resilience: Unit (Modulus of Resilience), kJ/m3 200 to 320
300
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18 to 21
22
Strength to Weight: Bending, points 18 to 20
21
Thermal Diffusivity, mm2/s 11
3.7
Thermal Shock Resistance, points 15 to 18
15

Alloy Composition

Carbon (C), % 0.050 to 0.17
0 to 0.2
Chromium (Cr), % 1.0 to 1.5
22 to 26
Iron (Fe), % 96.2 to 97.6
54.7 to 66
Manganese (Mn), % 0.4 to 0.65
0 to 1.5
Molybdenum (Mo), % 0.45 to 0.65
0 to 0.5
Nickel (Ni), % 0
12 to 15
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0.5 to 0.8
0 to 2.0
Sulfur (S), % 0 to 0.025
0 to 0.040