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ASTM B522 Class II vs. SAE-AISI D7 Steel

ASTM B522 class II belongs to the otherwise unclassified metals classification, while SAE-AISI D7 steel belongs to the iron alloys. There are 15 material properties with values for both materials. Properties with values for just one material (15, 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 B522 class II and the bottom bar is SAE-AISI D7 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 96
190
Poisson's Ratio 0.41
0.28
Shear Modulus, GPa 34
73
Tensile Strength: Ultimate (UTS), MPa 280 to 490
800 to 2120

Thermal Properties

Latent Heat of Fusion, J/g 77
270
Melting Completion (Liquidus), °C 1030
1440
Melting Onset (Solidus), °C 1030
1400
Specific Heat Capacity, J/kg-K 160
480
Thermal Expansion, µm/m-K 15
11

Otherwise Unclassified Properties

Density, g/cm3 17
7.6

Common Calculations

Stiffness to Weight: Axial, points 3.1
14
Stiffness to Weight: Bending, points 8.9
25
Strength to Weight: Axial, points 4.4 to 7.8
29 to 78
Strength to Weight: Bending, points 5.5 to 8.0
25 to 48
Thermal Shock Resistance, points 13 to 24
27 to 72

Alloy Composition

Carbon (C), % 0
2.2 to 2.5
Chromium (Cr), % 0
11.5 to 13.5
Copper (Cu), % 0
0 to 0.25
Gold (Au), % 68.5 to 69.5
0
Iron (Fe), % 0
76.6 to 81.9
Manganese (Mn), % 0
0 to 0.6
Molybdenum (Mo), % 0
0.7 to 1.2
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Platinum (Pt), % 5.5 to 6.5
0
Silicon (Si), % 0
0 to 0.6
Silver (Ag), % 24.5 to 25.5
0
Sulfur (S), % 0 to 0.010
0 to 0.030
Vanadium (V), % 0
3.8 to 4.4
Residuals, % 0 to 0.26
0

Comparable Variants