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ASTM Grade HF Steel vs. ASTM B596 Au-Cu

ASTM grade HF steel belongs to the iron alloys classification, while ASTM B596 Au-Cu belongs to the otherwise unclassified metals. There are 18 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 grade HF steel and the bottom bar is ASTM B596 Au-Cu.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
100
Elongation at Break, % 29
4.3 to 17
Poisson's Ratio 0.28
0.41
Shear Modulus, GPa 77
36
Tensile Strength: Ultimate (UTS), MPa 550
450 to 620

Thermal Properties

Latent Heat of Fusion, J/g 300
77
Melting Completion (Liquidus), °C 1410
1060
Melting Onset (Solidus), °C 1370
930
Specific Heat Capacity, J/kg-K 480
150
Thermal Expansion, µm/m-K 16
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
14
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
6.7

Otherwise Unclassified Properties

Density, g/cm3 7.7
18

Common Calculations

Stiffness to Weight: Axial, points 14
3.1
Stiffness to Weight: Bending, points 25
8.5
Strength to Weight: Axial, points 20
6.8 to 9.4
Strength to Weight: Bending, points 19
7.1 to 8.8
Thermal Shock Resistance, points 12
22 to 30

Alloy Composition


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Carbon (C), % 0.2 to 0.4
0
Chromium (Cr), % 18 to 23
0
Copper (Cu), % 0
9.0 to 11
Gold (Au), % 0
89 to 91
Iron (Fe), % 60 to 73.8
0
Manganese (Mn), % 0 to 2.0
0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 8.0 to 12
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 2.0
0
Sulfur (S), % 0 to 0.040
0
Residuals, % 0
0 to 0.4