ASTM A268/A268M-10(2016)
Standard Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service

Standard No.
ASTM A268/A268M-10(2016)
Release Date
2010
Published By
American Society for Testing and Materials (ASTM)
Status
Replace By
ASTM A268/A268M-20
Latest
ASTM A268/A268M-24
Scope

1.1 This specification2 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 (Table 1), 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.

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