ASTM A268/A268M - 20

Standard Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service

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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.TABLE?1??Continued Grade TP439 .?.?. .?.?. TP430 Ti TP XM-27 TP XM-33A 18Cr-2Mo 29-4 29-4-2 26-3-3 25-4-4 ... .?.?. . . .. . .. . .TP468UNS Designation S43035 S43932 S41500B S43036 S44627 S44626 S44400 S44700 S44800 S44660 S44635 S44735 S32803 S40977S43940S42035S46800Element Composition,?%C, max0.070.0300.050.100.01A0.060.0250.0100.0100.0300.0250.0300.015C0., max1.001.000.5–

Number of pages: 7

International relationships :

ICS: 23.040.10 - Iron and steel pipes

Item number: A001267