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ASTM A372 Grade L Steel vs. ASTM Grade HT Steel

Both ASTM A372 grade L steel and ASTM grade HT steel are iron alloys. They have 49% 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 A372 grade L steel and the bottom bar is ASTM grade HT steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 350
150
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 14
4.6
Fatigue Strength, MPa 670
130
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
76
Tensile Strength: Ultimate (UTS), MPa 1160
500
Tensile Strength: Yield (Proof), MPa 1040
270

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Maximum Temperature: Mechanical, °C 430
1010
Melting Completion (Liquidus), °C 1460
1390
Melting Onset (Solidus), °C 1420
1340
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 44
12
Thermal Expansion, µm/m-K 13
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 3.5
31
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 1.7
5.4
Embodied Energy, MJ/kg 22
76
Embodied Water, L/kg 54
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
19
Resilience: Unit (Modulus of Resilience), kJ/m3 2890
180
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 41
18
Strength to Weight: Bending, points 31
18
Thermal Diffusivity, mm2/s 12
3.2
Thermal Shock Resistance, points 34
12

Alloy Composition

Carbon (C), % 0.38 to 0.43
0.35 to 0.75
Chromium (Cr), % 0.7 to 0.9
15 to 19
Iron (Fe), % 95.2 to 96.3
38.2 to 51.7
Manganese (Mn), % 0.6 to 0.8
0 to 2.0
Molybdenum (Mo), % 0.2 to 0.3
0 to 0.5
Nickel (Ni), % 1.7 to 2.0
33 to 37
Phosphorus (P), % 0 to 0.015
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0 to 2.5
Sulfur (S), % 0 to 0.010
0 to 0.040