5 9 a sheet of steel 2 5 mm thick has nitrogen atmospheres on both sides at 900 c and is permitted to achieve a steady state diffusion condition. The diffusion coefficient for nitrogen in steel at this temperature is 6 x 10 m s and the diffusion flux is found to be 1 2 x 107 kg m2 s. A sheet of steel 1 5 mm thick has nitrogen atmospheres on both sides at 1200 c and is permitted to achieve a steady state diffusion condition.
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