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ASTM Grade HT Steel vs. ASTM A372 Grade L Steel

Both ASTM grade HT steel and ASTM A372 grade L 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 grade HT steel and the bottom bar is ASTM A372 grade L steel.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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