The Promotion of Baosteel Ferritic Stainless Steel B445J1M in Solar Water Heater Yunnan biggest Solar Water Heater producer started to use Baosteel ferritic stainless steel B445J1M products. Baosteel stainless steel branch provide the solution of application of ferritic stainless steel and guide the users to choose materials. Which has laid a solid foundation for the promotion of Baosteel ferritic stainless steel used in solar water heater in Yunnan.