5 7 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. 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. Also it is known that the concentration of nitrogen in the steel at the high pressure surface is 5 1 kg m.
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