ASTM B540 Palladium vs. SAE-AISI H22 Steel

ASTM B540 palladium belongs to the otherwise unclassified metals classification, while SAE-AISI H22 steel belongs to the iron alloys. There are 15 material properties with values for both materials. Properties with values for just one material (16, in this case) are not shown.

For each property being compared, the top bar is ASTM B540 palladium and the bottom bar is SAE-AISI H22 steel.

ASTM B540 Palladium Electrical Contact Alloy SAE-AISI H22 (T20822) Tungsten Hot-Work Steel

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		110
Elastic (Young's, Tensile) Modulus, GPa		200

Poisson's Ratio		0.38
Poisson's Ratio		0.29

Shear Modulus, GPa		39
Shear Modulus, GPa		77

Tensile Strength: Ultimate (UTS), MPa		830 to 1240
Tensile Strength: Ultimate (UTS), MPa		700 to 1920

Thermal Properties

Latent Heat of Fusion, J/g		140
Latent Heat of Fusion, J/g		250

Melting Completion (Liquidus), °C		1220
Melting Completion (Liquidus), °C		1670

Melting Onset (Solidus), °C		1020
Melting Onset (Solidus), °C		1620

Specific Heat Capacity, J/kg-K		240
Specific Heat Capacity, J/kg-K		440

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

Otherwise Unclassified Properties

Density, g/cm³		13
Density, g/cm³		8.7

Common Calculations

Stiffness to Weight: Axial, points		4.7
Stiffness to Weight: Axial, points		13

Stiffness to Weight: Bending, points		12
Stiffness to Weight: Bending, points		22

Strength to Weight: Axial, points		18 to 27
Strength to Weight: Axial, points		22 to 61

Strength to Weight: Bending, points		15 to 20
Strength to Weight: Bending, points		20 to 39

Thermal Shock Resistance, points		41 to 61
Thermal Shock Resistance, points		22 to 60

Alloy Composition

Carbon (C), %		0
Carbon (C), %		0.3 to 0.4

Chromium (Cr), %		0
Chromium (Cr), %		1.8 to 3.8

Copper (Cu), %		13.5 to 14.5
Copper (Cu), %		0 to 0.25

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

Iron (Fe), %		0
Iron (Fe), %		82.2 to 87.4

Manganese (Mn), %		0
Manganese (Mn), %		0.15 to 0.4

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

Palladium (Pd), %		34 to 36
Palladium (Pd), %		0

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

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

Silicon (Si), %		0
Silicon (Si), %		0.15 to 0.4

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

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

Tungsten (W), %		0
Tungsten (W), %		10 to 11.8

Vanadium (V), %		0
Vanadium (V), %		0.25 to 0.5

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

Residuals, %		0 to 0.3
Residuals, %		0