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ASTM A372 Grade H Steel vs. ASTM A182 Grade F5a

Both ASTM A372 grade H steel and ASTM A182 grade F5a are iron alloys. They have a moderately high 95% 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 A372 grade H steel and the bottom bar is ASTM A182 grade F5a.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 280
310
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20 to 22
25
Fatigue Strength, MPa 310 to 380
380
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
74
Shear Strength, MPa 410 to 570
450
Tensile Strength: Ultimate (UTS), MPa 650 to 910
710
Tensile Strength: Yield (Proof), MPa 430 to 550
520

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Maximum Temperature: Mechanical, °C 410
510
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 45
40
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
8.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
9.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
4.5
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.8
Embodied Energy, MJ/kg 20
24
Embodied Water, L/kg 49
69

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 160
160
Resilience: Unit (Modulus of Resilience), kJ/m3 500 to 810
700
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 23 to 32
25
Strength to Weight: Bending, points 21 to 27
23
Thermal Diffusivity, mm2/s 12
11
Thermal Shock Resistance, points 19 to 27
20

Alloy Composition

Carbon (C), % 0.3 to 0.4
0 to 0.25
Chromium (Cr), % 0.4 to 0.65
4.0 to 6.0
Iron (Fe), % 97.3 to 98.3
91.4 to 95.6
Manganese (Mn), % 0.75 to 1.1
0 to 0.6
Molybdenum (Mo), % 0.15 to 0.25
0.44 to 0.65
Nickel (Ni), % 0
0 to 0.5
Phosphorus (P), % 0 to 0.015
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0 to 0.5
Sulfur (S), % 0 to 0.010
0 to 0.030