|Description / Abstract
||Back to Top
|This specification covers carbon and high-strength lowalloy
steel structural shapes, plates, and bars and quenched and tempered
alloy steel for structural plates intended for use in bridges.
Grades 36 , 50 , 50S [345S], and 50W [345W] are also
included in Specifications A36/A36M, A572/ A572M, A992/A992M, and
A588/A588M, respectively. When the requirements of Table 8 or Table
9 or the supplementary requirements of this specification are
specified, they exceed the requirements of Specifications A36/A36M,
A572/A572M, A992/A992M, and A588/A588M.
Grades 50W [345W], HPS 50W [HPS 345W], HPS 70W [HPS 485W], and
HPS 100W [HPS 690W] have enhanced atmospheric corrosion resistance
(see 13.1.2). Product availability is shown in Table 1.
Grade HPS 70W [HPS 485W] or HPS 100W [HPS 690W] shall not be
substituted for Grades 36 , 50 , 50S [345S], 50W [345W],
or HPS 50W [HPS 345W]. Grade 50W [345W], or HPS 50W [HPS 345W]
shall not be substituted for Grades 36 , 50  or 50S
[345S] without agreement between the purchaser and the
When the steel is to be welded, it is presupposed that a welding
procedure suitable for the grade of steel and intended use or
service will be utilized. See Appendix X3 of Specification A6/A6M
for information on weldability.
For structural products to be used as tension components
requiring notch toughness testing, standardized requirements are
provided in this standard, and they are based upon American
Association of State Highway and Transportation Officials (AASHTO)
requirements for both fracture critical and non-fracture critical
Supplementary requirements are available but shall apply only if
specified in the purchase order.
The values stated in either SI units or inch-pound units are to
be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system shall
be used independently of the other. Combining values from the two
systems may result in non-conformance with the standard.
For structural products produced from coil and furnished without
heat treatment or with stress relieving only, the additional
requirements, including additional testing requirements and the
reporting of additional test results, of Specification A6/A6M
*A Summary of Changes section appears at the end of this
|Additional Supplemental Documents