The diffusion of nitrogen into BCC iron for 15 hours, at a temperature 550 0 C, results in nitrogen concentration of 0.3 wt% at a depth 2.3 mm from...

The diffusion of nitrogen into BCC iron for 15 hours, at a temperature 5500C, results in nitrogen concentration of 0.3 wt% at a depth 2.3 mm from the surface. If the diffusion occurs for 9 hours at 8000C, what would be the depth at concentration of 0.27 wt%.