National Metal Processing, IncNational Metal Processing ( NMP ) is a family-owned and operated commercial heat treating company located in Richmond, Kentucky. Since 1969, weve served as the heat treating expert for a list of companies that reads like a Whos Who in American industry. NMP offers traditional heat treating services including,, and vacuum heat treating, as well as more advanced processes such as laser surface hardening and laser welding. We invite you to take a closer look at NMP...see how the knowledge and experience of our staff, some with 30 plus years NMP experience, can help add value to your product.