This specification covers an aircraft-quality, low-alloy steel in the form of seamless mechanical tubing. This tubing has been typically used in thin-walled sections where a minimum tensile strength of 90-95 ksi (620-655 MPa) as received or up to 160 ksi (1103 MPa) after heat treatment is required and where parts may be welded during fabrication, but usage is not limited to such applications.
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