The diffusion coefficient for nitrogen in steel at this temperature is 1 85 10 10 m2 s and the diffusion flux is found to be 1 0 10 7 kg m2. 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. 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.
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