Which Alloy Has Better Thermal Conductivity: 304 SS or SAE 516 Grade 70?

AI Thread Summary
In selecting between 304 Stainless Steel and SAE 516 Grade 70 for an experimental heat transfer device, the focus is on thermal conductivity. 304 Stainless Steel generally offers better thermal conductivity than SAE 516 Grade 70, making it a preferable choice for heat transfer applications. For high-temperature exposure, 304H, which has higher carbon content, is recommended for improved performance. The discussion emphasizes the importance of material selection based on conductivity characteristics under specific conditions. Ultimately, 304H may provide the optimal solution for effective thermal transfer at elevated temperatures.
cwgarr
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I am trying to decide what alloy I should use in an experimental heat transfer device. I am considering 2 materials- 304 Stainless Steel and SAE 516 Grade 70 boiler steel. I want to choose the material that has the best conductivity characteristics. To be clear, I want the material that has the best thermal transfer rate. Both metals would be approximately .125" thick and would be exposed to a source heat of 1000F.
 
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