Ductile Hardened ASTM B540 vs. Work Hardened ASTM B685 Alloy

Both ductile hardened ASTM B540 and work hardened ASTM B685 alloy are otherwise unclassified metals. Both are furnished in the cold worked (strain hardened) condition. They have 49% of their average alloy composition in common. There are 17 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is ductile hardened ASTM B540 and the bottom bar is work hardened ASTM B685 alloy.

Ductile Hardened ASTM B540 Palladium Alloy Work Hardened ASTM B685 Palladium-Copper Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		110
Elastic (Young's, Tensile) Modulus, GPa		120

Poisson's Ratio		0.38
Poisson's Ratio		0.37

Shear Modulus, GPa		39
Shear Modulus, GPa		43

Tensile Strength: Ultimate (UTS), MPa		1170
Tensile Strength: Ultimate (UTS), MPa		1060

Thermal Properties

Latent Heat of Fusion, J/g		140
Latent Heat of Fusion, J/g		180

Melting Completion (Liquidus), °C		1220
Melting Completion (Liquidus), °C		1230

Melting Onset (Solidus), °C		1020
Melting Onset (Solidus), °C		1200

Specific Heat Capacity, J/kg-K		240
Specific Heat Capacity, J/kg-K		300

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

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		5.5
Electrical Conductivity: Equal Volume, % IACS		5.0

Electrical Conductivity: Equal Weight (Specific), % IACS		3.9
Electrical Conductivity: Equal Weight (Specific), % IACS		4.1

Otherwise Unclassified Properties

Density, g/cm³		13
Density, g/cm³		11

Common Calculations

Stiffness to Weight: Axial, points		4.7
Stiffness to Weight: Axial, points		6.1

Stiffness to Weight: Bending, points		12
Stiffness to Weight: Bending, points		15

Strength to Weight: Axial, points		26
Strength to Weight: Axial, points		27

Strength to Weight: Bending, points		19
Strength to Weight: Bending, points		21

Thermal Shock Resistance, points		58
Thermal Shock Resistance, points		46

Alloy Composition

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

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

Copper (Cu), %		13.5 to 14.5
Copper (Cu), %		39.5 to 40.5

Gold (Au), %		9.5 to 10.5
Gold (Au), %		0

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

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

Palladium (Pd), %		34 to 36
Palladium (Pd), %		59 to 60.5

Platinum (Pt), %		9.5 to 10.5
Platinum (Pt), %		0

Silver (Ag), %		29 to 31
Silver (Ag), %		0 to 0.1

Zinc (Zn), %		0.8 to 1.2
Zinc (Zn), %		0 to 0.060

Residuals, %		0
Residuals, %		0 to 0.2