ASTM B685 Alloy vs. SAE-AISI 1084 Steel

ASTM B685 alloy belongs to the otherwise unclassified metals classification, while SAE-AISI 1084 steel belongs to the iron alloys. There are 17 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 ASTM B685 alloy and the bottom bar is SAE-AISI 1084 steel.

ASTM B685 Palladium-Copper Electrical Contact Alloy SAE-AISI 1084 (G10840) Carbon Steel

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		120
Elastic (Young's, Tensile) Modulus, GPa		190

Poisson's Ratio		0.37
Poisson's Ratio		0.29

Shear Modulus, GPa		43
Shear Modulus, GPa		72

Tensile Strength: Ultimate (UTS), MPa		660 to 1060
Tensile Strength: Ultimate (UTS), MPa		780 to 930

Thermal Properties

Latent Heat of Fusion, J/g		180
Latent Heat of Fusion, J/g		240

Melting Completion (Liquidus), °C		1230
Melting Completion (Liquidus), °C		1450

Melting Onset (Solidus), °C		1200
Melting Onset (Solidus), °C		1410

Specific Heat Capacity, J/kg-K		300
Specific Heat Capacity, J/kg-K		470

Thermal Expansion, µm/m-K		14
Thermal Expansion, µm/m-K		12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		5.0
Electrical Conductivity: Equal Volume, % IACS		7.1

Electrical Conductivity: Equal Weight (Specific), % IACS		4.1
Electrical Conductivity: Equal Weight (Specific), % IACS		8.2

Otherwise Unclassified Properties

Density, g/cm³		11
Density, g/cm³		7.8

Common Calculations

Stiffness to Weight: Axial, points		6.1
Stiffness to Weight: Axial, points		13

Stiffness to Weight: Bending, points		15
Stiffness to Weight: Bending, points		24

Strength to Weight: Axial, points		17 to 27
Strength to Weight: Axial, points		28 to 33

Strength to Weight: Bending, points		16 to 21
Strength to Weight: Bending, points		24 to 27

Thermal Shock Resistance, points		28 to 46
Thermal Shock Resistance, points		25 to 30

Alloy Composition

Aluminum (Al), %		0 to 0.0050
Aluminum (Al), %		0

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

Carbon (C), %		0
Carbon (C), %		0.8 to 0.93

Copper (Cu), %		39.5 to 40.5
Copper (Cu), %		0

Iron (Fe), %		0 to 0.050
Iron (Fe), %		98.1 to 98.6

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

Manganese (Mn), %		0
Manganese (Mn), %		0.6 to 0.9

Palladium (Pd), %		59 to 60.5
Palladium (Pd), %		0

Phosphorus (P), %		0
Phosphorus (P), %		0 to 0.040

Silver (Ag), %		0 to 0.1
Silver (Ag), %		0

Sulfur (S), %		0
Sulfur (S), %		0 to 0.050

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

Residuals, %		0 to 0.2
Residuals, %		0