ASTM B540 Palladium vs. SAE-AISI H26 Steel

ASTM B540 palladium belongs to the otherwise unclassified metals classification, while SAE-AISI H26 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 H26 steel.

ASTM B540 Palladium Electrical Contact Alloy SAE-AISI H26 (T20826) Tungsten Hot-Work Steel

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		110
Elastic (Young's, Tensile) Modulus, GPa		210

Poisson's Ratio		0.38
Poisson's Ratio		0.29

Shear Modulus, GPa		39
Shear Modulus, GPa		80

Tensile Strength: Ultimate (UTS), MPa		830 to 1240
Tensile Strength: Ultimate (UTS), MPa		720 to 2100

Thermal Properties

Latent Heat of Fusion, J/g		140
Latent Heat of Fusion, J/g		240

Melting Completion (Liquidus), °C		1220
Melting Completion (Liquidus), °C		1810

Melting Onset (Solidus), °C		1020
Melting Onset (Solidus), °C		1760

Specific Heat Capacity, J/kg-K		240
Specific Heat Capacity, J/kg-K		410

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

Otherwise Unclassified Properties

Density, g/cm³		13
Density, g/cm³		9.3

Common Calculations

Stiffness to Weight: Axial, points		4.7
Stiffness to Weight: Axial, points		12

Stiffness to Weight: Bending, points		12
Stiffness to Weight: Bending, points		21

Strength to Weight: Axial, points		18 to 27
Strength to Weight: Axial, points		22 to 63

Strength to Weight: Bending, points		15 to 20
Strength to Weight: Bending, points		19 to 39

Thermal Shock Resistance, points		41 to 61
Thermal Shock Resistance, points		22 to 63

Alloy Composition

Carbon (C), %		0
Carbon (C), %		0.45 to 0.55

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

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), %		73.3 to 77.5

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), %		17.3 to 19

Vanadium (V), %		0
Vanadium (V), %		0.75 to 1.3

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

Residuals, %		0 to 0.3
Residuals, %		0