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Nickel 684 vs. ASTM B780 Alloy

Nickel 684 belongs to the nickel alloys classification, while ASTM B780 alloy belongs to the otherwise unclassified metals. There are 15 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is nickel 684 and the bottom bar is ASTM B780 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
83
Elongation at Break, % 11
1.1 to 9.1
Poisson's Ratio 0.29
0.36
Shear Modulus, GPa 76
30
Shear Strength, MPa 710
200 to 340
Tensile Strength: Ultimate (UTS), MPa 1190
330 to 590

Thermal Properties

Latent Heat of Fusion, J/g 320
140
Specific Heat Capacity, J/kg-K 470
270
Thermal Expansion, µm/m-K 13
18

Otherwise Unclassified Properties

Density, g/cm3 8.3
10

Common Calculations

Stiffness to Weight: Axial, points 13
4.5
Stiffness to Weight: Bending, points 23
14
Strength to Weight: Axial, points 40
9.1 to 16
Strength to Weight: Bending, points 30
11 to 15
Thermal Shock Resistance, points 34
16 to 29

Alloy Composition

Aluminum (Al), % 2.5 to 3.3
0
Boron (B), % 0.0030 to 0.010
0
Cadmium (Cd), % 0
0 to 0.050
Carbon (C), % 0 to 0.15
0
Chromium (Cr), % 15 to 20
0
Cobalt (Co), % 13 to 20
0
Copper (Cu), % 0 to 0.15
23.5 to 25.7
Iron (Fe), % 0 to 4.0
0 to 0.050
Lead (Pb), % 0
0 to 0.030
Manganese (Mn), % 0 to 0.75
0
Molybdenum (Mo), % 3.0 to 5.0
0
Nickel (Ni), % 42.7 to 64
0.35 to 0.65
Phosphorus (P), % 0 to 0.015
0
Silicon (Si), % 0 to 0.75
0
Silver (Ag), % 0
74 to 76
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 2.5 to 3.3
0
Zinc (Zn), % 0
0 to 0.060