Do the Stefan-Boltzman Law equation and report back. Full sunlight on Earth (you may be on a different planet) imparts about 1kW/meter. of power A black object will heat in the sun until it starts losing that power as fast as it comes in–via convection and radiation. To lose 1 kW over 1 m2 requires a temperature of T= Square Root (1000/5.67⋅10−8) or ≈364 K or 195F.
This is the theoretical maximum, based on a perfect black body and the assumption that the material only loses heat from the side facing the sun–in other words, the material is mounted to a good insulator. The bottom line here is that a work table made of thin SS stock won’t get very hot without an outside force at work, e.g/, a greenhouse effect. Tray that, too–put a SS bowl rightside up in the hot sun, and then compare its temperature with the same bowl inverted to create a dead space.
Where conduction comes into play is only that heated metals will feel hotter than most non-metals, even if they are exactly the same temperature.
