TP347/347H Stainless Steel Seamless Tube

TP347/TP347H Stainless Steel Seamless Pipe Highlight

Alloy 347 is a stabilized austenitic chromium steel containing columbium to eliminate carbide precipitation, thereby eliminating intergranular corrosion. Alloy 347 is stabilized by the addition of chromium and tantalum and provides higher creep and stress rupture properties than alloys 304 and 304L, which can also be used for exposures of concern to sensitization and intergranular corrosion. The addition of columbium also gives Alloy 347 excellent corrosion resistance, even better than Alloy 321. 347H is a higher carbon content form of Alloy 347 and exhibits improved high temperature and creep properties.

Specifications: UNS S34700 / S34709

Application:

Alloy 347 is frequently used in the manufacture of equipment that must be put into service under severe corrosive conditions and is also common in the petroleum refining industry. Applications where Alloy 347 has been used consistently include:

High temperature chemical process

heat exchanger tube

High temperature steam service

High pressure steam pipe

Radiant superheater

boiler tube

heavy duty exhaust system

General Refinery Pipelines