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ASTM Grade HN Steel vs. 70Ag-30Ni Alloy

ASTM grade HN steel belongs to the iron alloys classification, while 70Ag-30Ni alloy belongs to the otherwise unclassified metals. They have a modest 25% of their average alloy composition in common, which, by itself, doesn't mean much. There are 15 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is ASTM grade HN steel and the bottom bar is 70Ag-30Ni alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
100
Poisson's Ratio 0.28
0.35
Shear Modulus, GPa 77
39
Tensile Strength: Ultimate (UTS), MPa 500
320 to 530

Thermal Properties

Latent Heat of Fusion, J/g 310
170
Melting Completion (Liquidus), °C 1400
960
Melting Onset (Solidus), °C 1350
960
Specific Heat Capacity, J/kg-K 480
300
Thermal Expansion, µm/m-K 16
17

Otherwise Unclassified Properties

Density, g/cm3 7.9
10

Common Calculations

Stiffness to Weight: Axial, points 14
5.8
Stiffness to Weight: Bending, points 25
16
Strength to Weight: Axial, points 17
8.8 to 15
Strength to Weight: Bending, points 18
10 to 15
Thermal Shock Resistance, points 11
13 to 21

Alloy Composition

Carbon (C), % 0.2 to 0.5
0
Chromium (Cr), % 19 to 23
0
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
28.8 to 31
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 2.0
0
Silver (Ag), % 0
69 to 71
Sulfur (S), % 0 to 0.040
0
Residuals, % 0
0 to 0.2