... stainless steel SA213, or Copper DHP, or copper nickel alloy C70600, C71500, C70400 and Brass C44300, C687004) Economizer fin tube, ... stainless steel SA213, or Copper DHP, or copper nickel alloy C70600, C71500, C70400 and Brass C44300, C687005) Serrated HRSG fin tubes6 ... stainless steel SA213, or Copper DHP, or copper nickel alloy C70600, C71500, C70400 and Brass C44300, C687008) Hight Finning tube ...