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ASTM A372 Grade L Steel vs. ASTM B522 Class II

ASTM A372 grade L steel belongs to the iron alloys classification, while ASTM B522 class II belongs to the otherwise unclassified metals. There are 22 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is ASTM A372 grade L steel and the bottom bar is ASTM B522 class II.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
96
Elongation at Break, % 14
1.1 to 28
Poisson's Ratio 0.29
0.41
Shear Modulus, GPa 73
34
Shear Strength, MPa 700
180 to 280
Tensile Strength: Ultimate (UTS), MPa 1160
280 to 490
Tensile Strength: Yield (Proof), MPa 1040
120 to 210

Thermal Properties

Latent Heat of Fusion, J/g 250
77
Melting Completion (Liquidus), °C 1460
1030
Melting Onset (Solidus), °C 1420
1030
Specific Heat Capacity, J/kg-K 470
160
Thermal Expansion, µm/m-K 13
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
11
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
5.7

Otherwise Unclassified Properties

Density, g/cm3 7.8
17

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
4.4 to 63
Resilience: Unit (Modulus of Resilience), kJ/m3 2890
75 to 230
Stiffness to Weight: Axial, points 13
3.1
Stiffness to Weight: Bending, points 24
8.9
Strength to Weight: Axial, points 41
4.4 to 7.8
Strength to Weight: Bending, points 31
5.5 to 8.0
Thermal Shock Resistance, points 34
13 to 24

Alloy Composition


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Carbon (C), % 0.38 to 0.43
0
Chromium (Cr), % 0.7 to 0.9
0
Gold (Au), % 0
68.5 to 69.5
Iron (Fe), % 95.2 to 96.3
0
Manganese (Mn), % 0.6 to 0.8
0
Molybdenum (Mo), % 0.2 to 0.3
0
Nickel (Ni), % 1.7 to 2.0
0
Phosphorus (P), % 0 to 0.015
0
Platinum (Pt), % 0
5.5 to 6.5
Silicon (Si), % 0.15 to 0.35
0
Silver (Ag), % 0
24.5 to 25.5
Sulfur (S), % 0 to 0.010
0 to 0.010
Residuals, % 0
0 to 0.26