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ASTM A369 Grade FPA vs. ASTM B540 Palladium

ASTM A369 grade FPA belongs to the iron alloys classification, while ASTM B540 palladium belongs to the otherwise unclassified metals. There are 23 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is ASTM A369 grade FPA and the bottom bar is ASTM B540 palladium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 27
1.1 to 14
Fatigue Strength, MPa 180
350
Poisson's Ratio 0.29
0.38
Shear Modulus, GPa 73
39
Shear Strength, MPa 240
500 to 700
Tensile Strength: Ultimate (UTS), MPa 380
830 to 1240
Tensile Strength: Yield (Proof), MPa 240
620 to 1000

Thermal Properties

Latent Heat of Fusion, J/g 250
140
Melting Completion (Liquidus), °C 1460
1220
Melting Onset (Solidus), °C 1420
1020
Specific Heat Capacity, J/kg-K 470
240
Thermal Expansion, µm/m-K 12
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
4.9 to 5.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
3.5 to 3.9

Otherwise Unclassified Properties

Density, g/cm3 7.8
13

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 89
13 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 150
1790 to 4660
Stiffness to Weight: Axial, points 13
4.7
Stiffness to Weight: Bending, points 24
12
Strength to Weight: Axial, points 13
18 to 27
Strength to Weight: Bending, points 15
15 to 20
Thermal Shock Resistance, points 12
41 to 61

Alloy Composition

Carbon (C), % 0 to 0.25
0
Copper (Cu), % 0
13.5 to 14.5
Gold (Au), % 0
9.5 to 10.5
Iron (Fe), % 98.3 to 99.63
0
Manganese (Mn), % 0.27 to 0.93
0
Palladium (Pd), % 0
34 to 36
Phosphorus (P), % 0 to 0.035
0
Platinum (Pt), % 0
9.5 to 10.5
Silicon (Si), % 0.1 to 0.5
0
Silver (Ag), % 0
29 to 31
Sulfur (S), % 0 to 0.035
0
Zinc (Zn), % 0
0.8 to 1.2
Residuals, % 0
0 to 0.3