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ASTM A387 Grade 12 Steel vs. ASTM B596 Au-Cu

ASTM A387 grade 12 steel belongs to the iron alloys classification, while ASTM B596 Au-Cu belongs to the otherwise unclassified metals. There are 19 material properties with values for both materials. Properties with values for just one material (13, 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 A387 grade 12 steel and the bottom bar is ASTM B596 Au-Cu.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
100
Elongation at Break, % 25
4.3 to 17
Poisson's Ratio 0.29
0.41
Shear Modulus, GPa 73
36
Shear Strength, MPa 300 to 330
280 to 360
Tensile Strength: Ultimate (UTS), MPa 470 to 520
450 to 620

Thermal Properties

Latent Heat of Fusion, J/g 250
77
Melting Completion (Liquidus), °C 1470
1060
Melting Onset (Solidus), °C 1420
930
Specific Heat Capacity, J/kg-K 470
150
Thermal Expansion, µm/m-K 13
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
14
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
6.7

Otherwise Unclassified Properties

Density, g/cm3 7.8
18

Common Calculations

Stiffness to Weight: Axial, points 13
3.1
Stiffness to Weight: Bending, points 24
8.5
Strength to Weight: Axial, points 16 to 18
6.8 to 9.4
Strength to Weight: Bending, points 17 to 18
7.1 to 8.8
Thermal Shock Resistance, points 14 to 15
22 to 30

Alloy Composition


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Carbon (C), % 0.050 to 0.17
0
Chromium (Cr), % 0.8 to 1.2
0
Copper (Cu), % 0
9.0 to 11
Gold (Au), % 0
89 to 91
Iron (Fe), % 97 to 98.2
0
Manganese (Mn), % 0.4 to 0.65
0
Molybdenum (Mo), % 0.45 to 0.6
0
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0.15 to 0.4
0
Sulfur (S), % 0 to 0.025
0
Residuals, % 0
0 to 0.4

Comparable Variants