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Ductile Hardened ASTM B540 vs. Work Hardened 90-platinum 10-iridium

Both ductile hardened ASTM B540 and work hardened 90-platinum 10-iridium are otherwise unclassified metals. Both are furnished in the cold worked (strain hardened) condition. There are 16 material properties with values for both materials. Properties with values for just one material (8, 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 90-platinum 10-iridium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 9.1
5.5
Poisson's Ratio 0.38
0.38
Shear Modulus, GPa 39
74
Shear Strength, MPa 690
320
Tensile Strength: Ultimate (UTS), MPa 1170
550

Thermal Properties

Latent Heat of Fusion, J/g 140
100
Melting Completion (Liquidus), °C 1220
1830
Specific Heat Capacity, J/kg-K 240
130
Thermal Expansion, µm/m-K 14
8.6

Otherwise Unclassified Properties

Density, g/cm3 13
22

Common Calculations

Stiffness to Weight: Axial, points 4.7
5.3
Stiffness to Weight: Bending, points 12
9.1
Strength to Weight: Axial, points 26
7.1
Strength to Weight: Bending, points 19
6.9
Thermal Shock Resistance, points 58
22

Alloy Composition

Copper (Cu), % 13.5 to 14.5
0
Gold (Au), % 9.5 to 10.5
0
Iridium (Ir), % 0
9.5 to 10.5
Palladium (Pd), % 34 to 36
0
Platinum (Pt), % 9.5 to 10.5
89.3 to 90.5
Silver (Ag), % 29 to 31
0
Zinc (Zn), % 0.8 to 1.2
0
Residuals, % 0
0 to 0.2