There are two major types of finned tubes available with us, single metal tubes (also called monometallic fin tube) and Bimetallic tube (composited extruded fin tube) . The former uses Copper, Aluminum, and Copper Nickel alone. The later has a core tube on the inside made of harder material. In this case, the outer tube is rolled onto the core tube in order to provide for a tight bond and good thermal contact between the two tubes.

Extruded Bimetallic Finned Tube is combined with two different materials.

Materials Standard

Base Tube

Carbon steel tube: SA179, SA334, SA214, SA106B, GB8163, GB9948, GB3087,10#, 20#,

Stainless steel tube: SA789, SA213, SA312, SA210, SA249, 304, 316L, T11, T22, T91

Copper tube: C1100, C12200, C44300, C68700, C70600, C71500, CuNi90/10, 70/10,70/20,70/30

Fin material: Aluminum 1060, 1050, 1070, 6063,6061,3003