Seamless Pipe ASTM A519

Standard Specification for Seamless Carbon and Alloy Steel Mechanical Tubing Seamless mechanical tubing is manufactured from carbon and alloy steels for structural or other mechanical purposes involving machining or heat treating, where close tolerances, smooth finish, or definite physical...

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Standard Specification for Seamless Carbon and Alloy Steel Mechanical Tubing

Seamless mechanical tubing is manufactured from carbon and alloy steels for structural or other mechanical purposes involving machining or heat treating, where close tolerances, smooth finish, or definite physical properties are important factors.

Cold Drawn Seamless are generally carried to OD and ID tolerances, except when the ID is less than 50 percent of the OD.

SPECIAL NOTE: Tolerances are applicable only to two dimensions (length excepted). Thus, if OD and wall are specified, the theoretical ID may not conform to published tolerances except that the mean or average wall (taking into account the permissible OD and ID tolerances) will not vary more than indicated under “DIAMETER AND WALL TOLERANCES.”

EXAMPLE: If a cold drawn tube is specified 1-1/2 inch OD x 1-1/4 inch ID, one might expect the theoretical wall of 1/8 inch to be held to a variation of plus or minus 7-1/2 percent or within the limits of 0.116/0.134 inch.

However, for a nominal OD of 1.500 inch, the OD may vary between 1.500 inch and 1.505 inch, and the ID may vary between 1.245 inch and 1.250 inch, which may result in an average or mean wall of 0.130 inch instead of 1/8 inch. Consequently, the wall may vary plus or minus 7.12 percent from the mean of 0.130 inch, or within limits of 0.120/0.140 inch. If, however, the average wall were 1/8 inch (0.125) reflecting 1.500 inch OD and 1.250 inch ID, the wall limits would be plus or minus 7.12 percent of 1/8 or 0.116/0.134 inch. Hence, any order of tubes might vary in the entire lot as low as 0.116 inch on some and as high as 0.134 inch on others.


Sizes Available:

Hot finish mechanical 2" - 26" OD and up to 4" walls

Cold drawn mechanical .875" - 12" OD and .083" - 1.375" walls

ASME Carbon Pipe OD's, non-schedule walls 2.50" - 26" nominal and up to 4" walls


Lengths Available:

Standard and mult lengths available

Auto Remnant Shorts Program Available

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