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ASTM Grade HN Steel vs. ASTM B541 Gold

ASTM grade HN steel belongs to the iron alloys classification, while ASTM B541 gold belongs to the otherwise unclassified metals. 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 grade HN steel and the bottom bar is ASTM B541 gold.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 9.0
6.0 to 14
Poisson's Ratio 0.28
0.4
Shear Modulus, GPa 77
38
Tensile Strength: Ultimate (UTS), MPa 500
670 to 1180

Thermal Properties

Latent Heat of Fusion, J/g 310
90
Melting Completion (Liquidus), °C 1400
1110
Melting Onset (Solidus), °C 1350
930
Specific Heat Capacity, J/kg-K 480
170
Thermal Expansion, µm/m-K 16
13

Otherwise Unclassified Properties

Density, g/cm3 7.9
17

Common Calculations

Stiffness to Weight: Axial, points 14
3.4
Stiffness to Weight: Bending, points 25
9.0
Strength to Weight: Axial, points 17
11 to 19
Strength to Weight: Bending, points 18
9.8 to 14
Thermal Shock Resistance, points 11
36 to 63

Alloy Composition

Carbon (C), % 0.2 to 0.5
0
Chromium (Cr), % 19 to 23
0
Copper (Cu), % 0
13.5 to 15.5
Gold (Au), % 0
70.5 to 72.5
Iron (Fe), % 44.9 to 57.8
0
Manganese (Mn), % 0 to 2.0
0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 23 to 27
0
Phosphorus (P), % 0 to 0.040
0
Platinum (Pt), % 0
8.0 to 9.0
Silicon (Si), % 0 to 2.0
0
Silver (Ag), % 0
4.0 to 5.0
Sulfur (S), % 0 to 0.040
0
Zinc (Zn), % 0
0.7 to 1.3
Residuals, % 0
0 to 0.4