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ASTM A372 Grade H Steel vs. SAE-AISI 1144 Steel

Both ASTM A372 grade H steel and SAE-AISI 1144 steel are iron alloys. Their average alloy composition is basically identical. There are 31 material properties with values for both materials. Properties with values for just one material (1, 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 SAE-AISI 1144 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 280
220 to 230
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20 to 22
11 to 17
Fatigue Strength, MPa 310 to 380
280 to 430
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
72
Shear Strength, MPa 410 to 570
460 to 510
Tensile Strength: Ultimate (UTS), MPa 650 to 910
750 to 840
Tensile Strength: Yield (Proof), MPa 430 to 550
420 to 690

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
7.2
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

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 160
91 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 500 to 810
480 to 1290
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23 to 32
27 to 30
Strength to Weight: Bending, points 21 to 27
23 to 25
Thermal Diffusivity, mm2/s 12
14
Thermal Shock Resistance, points 19 to 27
22 to 24

Alloy Composition

Carbon (C), % 0.3 to 0.4
0.4 to 0.48
Chromium (Cr), % 0.4 to 0.65
0
Iron (Fe), % 97.3 to 98.3
97.5 to 98
Manganese (Mn), % 0.75 to 1.1
1.4 to 1.7
Molybdenum (Mo), % 0.15 to 0.25
0
Phosphorus (P), % 0 to 0.015
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0
Sulfur (S), % 0 to 0.010
0.24 to 0.33

Comparable Variants