ASTM A31-04

1.1 This specification covers steel rivets for use in boilers and pressure vessels and steel bars for use in the manufacture of rivets.

1.2 Two grades are covered:

1.2.1 Grade A - Bars having a yield point of 23 000 psi (160 MPa) minimum with no controls on carbon content.

1.2.2 Grade B - Bars having a yield point of 29 000 psi (200 MPa) minimum with carbon 0.28 % maximum.

1.2.3 Rivets are manufactured from the applicable bar grade.

1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.