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EN 1.7221 Steel vs. ASTM B477 Au-Ni-Ag

EN 1.7221 steel belongs to the iron alloys classification, while ASTM B477 Au-Ni-Ag 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 EN 1.7221 steel and the bottom bar is ASTM B477 Au-Ni-Ag.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
95
Elongation at Break, % 11 to 17
5.5 to 11
Poisson's Ratio 0.29
0.41
Shear Modulus, GPa 73
34
Tensile Strength: Ultimate (UTS), MPa 650 to 780
310 to 550

Thermal Properties

Latent Heat of Fusion, J/g 250
80
Melting Completion (Liquidus), °C 1460
1010
Melting Onset (Solidus), °C 1420
930
Specific Heat Capacity, J/kg-K 470
160
Thermal Expansion, µm/m-K 13
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
14
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
7.5

Otherwise Unclassified Properties

Density, g/cm3 7.8
17

Common Calculations

Stiffness to Weight: Axial, points 13
3.1
Stiffness to Weight: Bending, points 24
8.9
Strength to Weight: Axial, points 23 to 27
5.0 to 9.0
Strength to Weight: Bending, points 21 to 24
6.0 to 8.8
Thermal Shock Resistance, points 19 to 23
16 to 28

Alloy Composition

Carbon (C), % 0.22 to 0.29
0
Chromium (Cr), % 0.8 to 1.2
0
Gold (Au), % 0
74.2 to 75.8
Iron (Fe), % 96.8 to 98.3
0
Manganese (Mn), % 0.5 to 0.8
0
Molybdenum (Mo), % 0.15 to 0.3
0
Nickel (Ni), % 0
2.6 to 3.4
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.6
0
Silver (Ag), % 0
21.4 to 22.6
Sulfur (S), % 0 to 0.030
0
Residuals, % 0
0 to 0.3

Comparable Variants