Annealed ASTM B780 Alloy vs. Annealed SAE-AISI M50

Annealed ASTM B780 alloy belongs to the otherwise unclassified metals classification, while annealed SAE-AISI M50 belongs to the iron alloys. There are 16 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is annealed ASTM B780 alloy and the bottom bar is annealed SAE-AISI M50.

Annealed ASTM B780 Silver-Copper-Nickel Alloy Annealed M50 Tool Steel

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		83
Elastic (Young's, Tensile) Modulus, GPa		190

Poisson's Ratio		0.36
Poisson's Ratio		0.29

Shear Modulus, GPa		30
Shear Modulus, GPa		75

Tensile Strength: Ultimate (UTS), MPa		330
Tensile Strength: Ultimate (UTS), MPa		720

Thermal Properties

Latent Heat of Fusion, J/g		140
Latent Heat of Fusion, J/g		260

Melting Completion (Liquidus), °C		860
Melting Completion (Liquidus), °C		1480

Specific Heat Capacity, J/kg-K		270
Specific Heat Capacity, J/kg-K		470

Thermal Expansion, µm/m-K		18
Thermal Expansion, µm/m-K		13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		76
Electrical Conductivity: Equal Volume, % IACS		8.7

Electrical Conductivity: Equal Weight (Specific), % IACS		68
Electrical Conductivity: Equal Weight (Specific), % IACS		10

Otherwise Unclassified Properties

Density, g/cm³		10
Density, g/cm³		7.9

Common Calculations

Stiffness to Weight: Axial, points		4.5
Stiffness to Weight: Axial, points		14

Stiffness to Weight: Bending, points		14
Stiffness to Weight: Bending, points		25

Strength to Weight: Axial, points		9.1
Strength to Weight: Axial, points		26

Strength to Weight: Bending, points		11
Strength to Weight: Bending, points		23

Thermal Shock Resistance, points		16
Thermal Shock Resistance, points		21

Alloy Composition

Cadmium (Cd), %		0 to 0.050
Cadmium (Cd), %		0

Carbon (C), %		0
Carbon (C), %		0.78 to 0.88

Chromium (Cr), %		0
Chromium (Cr), %		3.8 to 4.5

Copper (Cu), %		23.5 to 25.7
Copper (Cu), %		0 to 0.25

Iron (Fe), %		0 to 0.050
Iron (Fe), %		87 to 90.4

Lead (Pb), %		0 to 0.030
Lead (Pb), %		0

Manganese (Mn), %		0
Manganese (Mn), %		0.15 to 0.45

Molybdenum (Mo), %		0
Molybdenum (Mo), %		3.9 to 4.8

Nickel (Ni), %		0.35 to 0.65
Nickel (Ni), %		0 to 0.3

Phosphorus (P), %		0
Phosphorus (P), %		0 to 0.030

Silicon (Si), %		0
Silicon (Si), %		0.2 to 0.6

Silver (Ag), %		74 to 76
Silver (Ag), %		0

Sulfur (S), %		0
Sulfur (S), %		0 to 0.030

Vanadium (V), %		0
Vanadium (V), %		0.8 to 1.3

Zinc (Zn), %		0 to 0.060
Zinc (Zn), %		0