ASTM A213 T911 Grades containing the letter H in their designation have requirements different from those of similar grades not containing the letter H.
These different requirements provide higher creep-rupture strength than normally achievable in similar grades without these different requirements. ASTM A213 T911 tubes shall be made by the seamless process and shall be either hot finished or cold finished, as specified. Grade TP347HFG shall be cold finished. Heat treatment shall be done separately and in addition to heating for hot forming. The ferritic alloy and ferritic stainless steels shall be reheated. On the other hand, austenitic stainless steel tubes shall be furnished in the heat-treated condition. Alternatively, immediately after hot forming, while the temperature of the tubes is not less than the minimum solution temperature, tubes may be individually quenched in water or rapidly cooled by other means. Tension test, hardness test, flattening test, and flaring test shall be done to each tube. Also, each tube shall be subjected to the nondestructive electric test or hydrostatic test.
Inconel 690(UNS N06690) is a high-chromium-nickel alloy with excellent resistance to many corrosive aqueous media and high-temperature atmospheres. Its high alloy content gives it resistance to stress corrosion cracking in chloride-containing environments and moderate ...
Nickel based alloys are very useful materials for the manufacture of high quality tubing products. One of the key reasons is that they offer excellent corrosion resistance in both aqueous and high temperature applications. Nickel alloys are excellent for heat exchangers in the ...
ARK offers a range of products specifically meeting the demands and specifications required in the fabrication of shell and tube heat exchangers/boiler. Our heat exchanger tubes are used for the cooling, heating or re-heating of fluids, gases, or air in a wide range of ...