ASTM A268 TP430Ti 1.4510 Ferritic Seamless Tube For Oil And Gas

ASTM A268 TP430Ti 1.4510 Ferritic Seamless Tube For Oil And Gas

What is ASTM A268?

This specification covers a number of grades of nominal-wall-thickness, stainless steel tubing for general corrosion-resisting and high-temperature service. Most of these grades are commonly known as the “straight-chromium” types and are characterized by being ferromagnetic. Two of these grades, TP410 and UNS S 41500, are amenable to hardening by heat treatment, and the high-chromium, ferritic alloys are sensitive to notch-brittleness on slow cooling to ordinary temperatures. These features should be recognized in the use of these materials. Grade TP439 is used primarily for
hot-water tank service and does not require post-weld heat treatment to prevent attack of the heat affected zone.

The tubes shall be made by the seamless or welded process with no filler metal added, tubes shall be reheated to a temperature of 1200.F [650.C] or higher and cooled to meet the requirements of this specification, All tubes shall be free of excessive mill scale, suitable for inspection. A slight amount of oxidation will not be considered as scale.

430Ti is an alternative to 430 with better formability and weldability for stamping, drawability applications, and complex shapes. It is a medium-chromium ferritic stainless steel that can be used in many mildly corrosive environments. Because of its titanium alloying, 430Ti can be welded in all dimensions without becoming susceptible to intergranular corrosion.
It is possible to use 430Ti at elevated temperatures, like for instance in the cold end of automotive exhaust systems.

Chemical Composition

Equivalent Material

Physical Properties of TP430Ti

ASTM A268 Tube Dimensions