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S21640 Stainless Steel vs. ASTM B540 Palladium

S21640 stainless steel 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 (11, in this case) are not shown.

For each property being compared, the top bar is S21640 stainless steel and the bottom bar is ASTM B540 palladium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 46
1.1 to 14
Fatigue Strength, MPa 320
350
Poisson's Ratio 0.28
0.38
Shear Modulus, GPa 78
39
Shear Strength, MPa 520
500 to 700
Tensile Strength: Ultimate (UTS), MPa 740
830 to 1240
Tensile Strength: Yield (Proof), MPa 350
620 to 1000

Thermal Properties

Latent Heat of Fusion, J/g 290
140
Melting Completion (Liquidus), °C 1430
1220
Melting Onset (Solidus), °C 1380
1020
Specific Heat Capacity, J/kg-K 480
240
Thermal Expansion, µm/m-K 17
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
4.9 to 5.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
3.5 to 3.9

Otherwise Unclassified Properties

Density, g/cm3 7.7
13

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 280
13 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 300
1790 to 4660
Stiffness to Weight: Axial, points 14
4.7
Stiffness to Weight: Bending, points 25
12
Strength to Weight: Axial, points 27
18 to 27
Strength to Weight: Bending, points 23
15 to 20
Thermal Shock Resistance, points 16
41 to 61

Alloy Composition

Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 17.5 to 19.5
0
Copper (Cu), % 0
13.5 to 14.5
Gold (Au), % 0
9.5 to 10.5
Iron (Fe), % 63 to 74.3
0
Manganese (Mn), % 3.5 to 6.5
0
Molybdenum (Mo), % 0.5 to 2.0
0
Nickel (Ni), % 4.0 to 6.5
0
Niobium (Nb), % 0.1 to 1.0
0
Nitrogen (N), % 0.080 to 0.3
0
Palladium (Pd), % 0
34 to 36
Phosphorus (P), % 0 to 0.060
0
Platinum (Pt), % 0
9.5 to 10.5
Silicon (Si), % 0 to 1.0
0
Silver (Ag), % 0
29 to 31
Sulfur (S), % 0 to 0.030
0
Zinc (Zn), % 0
0.8 to 1.2
Residuals, % 0
0 to 0.3