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ASTM B596 Au-Cu vs. ASTM Grade HP Steel

ASTM B596 Au-Cu belongs to the otherwise unclassified metals classification, while ASTM grade HP steel belongs to the iron alloys. There are 16 material properties with values for both materials. Properties with values for just one material (17, 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 B596 Au-Cu and the bottom bar is ASTM grade HP steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
200
Elongation at Break, % 4.3 to 17
5.1
Poisson's Ratio 0.41
0.28
Shear Modulus, GPa 36
78
Tensile Strength: Ultimate (UTS), MPa 450 to 620
490

Thermal Properties

Latent Heat of Fusion, J/g 77
320
Melting Completion (Liquidus), °C 1060
1370
Melting Onset (Solidus), °C 930
1330
Specific Heat Capacity, J/kg-K 150
480
Thermal Expansion, µm/m-K 14
16

Otherwise Unclassified Properties

Density, g/cm3 18
7.9

Common Calculations

Stiffness to Weight: Axial, points 3.1
14
Stiffness to Weight: Bending, points 8.5
25
Strength to Weight: Axial, points 6.8 to 9.4
17
Strength to Weight: Bending, points 7.1 to 8.8
17
Thermal Shock Resistance, points 22 to 30
11

Alloy Composition

Carbon (C), % 0
0.35 to 0.75
Chromium (Cr), % 0
24 to 28
Copper (Cu), % 9.0 to 11
0
Gold (Au), % 89 to 91
0
Iron (Fe), % 0
29.2 to 42.7
Manganese (Mn), % 0
0 to 2.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0
33 to 37
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 2.5
Sulfur (S), % 0
0 to 0.040
Residuals, % 0 to 0.4
0