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ASTM A372 Grade H Steel vs. Grade FDC Steel

Both ASTM A372 grade H steel and grade FDC steel are iron alloys. Their average alloy composition is basically identical. There are 25 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is ASTM A372 grade H steel and the bottom bar is grade FDC steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 280
510
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
80
Tensile Strength: Ultimate (UTS), MPa 650 to 910
1680

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 410
400
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 45
51
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
1.9
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.4
Embodied Energy, MJ/kg 20
19
Embodied Water, L/kg 49
47

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23 to 32
60
Strength to Weight: Bending, points 21 to 27
40
Thermal Diffusivity, mm2/s 12
14
Thermal Shock Resistance, points 19 to 27
50

Alloy Composition

Carbon (C), % 0.3 to 0.4
0.6 to 0.75
Chromium (Cr), % 0.4 to 0.65
0 to 0.3
Copper (Cu), % 0
0 to 0.12
Iron (Fe), % 97.3 to 98.3
98 to 99.4
Manganese (Mn), % 0.75 to 1.1
0.5 to 1.2
Molybdenum (Mo), % 0.15 to 0.25
0
Phosphorus (P), % 0 to 0.015
0 to 0.030
Silicon (Si), % 0.15 to 0.35
0.1 to 0.35
Sulfur (S), % 0 to 0.010
0 to 0.025