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Cold Finished AISI 304L vs. Work Hardened 90-platinum 10-iridium

Cold finished AISI 304L belongs to the iron alloys classification, while work hardened 90-platinum 10-iridium belongs to the otherwise unclassified metals. There are 16 material properties with values for both materials. Properties with values for just one material (19, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is cold finished AISI 304L and the bottom bar is work hardened 90-platinum 10-iridium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
5.5
Poisson's Ratio 0.28
0.38
Shear Modulus, GPa 77
74
Shear Strength, MPa 480
320
Tensile Strength: Ultimate (UTS), MPa 710
550

Thermal Properties

Latent Heat of Fusion, J/g 290
100
Melting Completion (Liquidus), °C 1450
1830
Specific Heat Capacity, J/kg-K 480
130
Thermal Expansion, µm/m-K 17
8.6

Otherwise Unclassified Properties

Density, g/cm3 7.8
22

Common Calculations

Stiffness to Weight: Axial, points 14
5.3
Stiffness to Weight: Bending, points 25
9.1
Strength to Weight: Axial, points 25
7.1
Strength to Weight: Bending, points 23
6.9
Thermal Shock Resistance, points 15
22

Alloy Composition


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Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 18 to 20
0
Iridium (Ir), % 0
9.5 to 10.5
Iron (Fe), % 65 to 74
0
Manganese (Mn), % 0 to 2.0
0
Nickel (Ni), % 8.0 to 12
0
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0
Platinum (Pt), % 0
89.3 to 90.5
Silicon (Si), % 0 to 0.75
0
Sulfur (S), % 0 to 0.030
0
Residuals, % 0
0 to 0.2