By 803056
Date 01-18-2018 14:46
Edited 01-18-2018 14:57
This was found on a supplier's web site. It may influence the committee's thoughts on whether to include it in the list of prequalified materials;
Chemical Composition
ASTM A514 is typically bought to meet physical requirements rather than chemical requirements. For that reason, chemical content is generally not provided unless requested prior to production. Any material can be sent to a third party after production to be tested for chemical content.
Clause 4 includes a table listing high strength low alloy steels that are approved for use, but not prequalified. The Engineer can specify the use of the ASTM A514, but the contractor must qualify the WPS by testing per clause 4. The variability in chemistry may be one of several reasons why the committee took the position they do.
Al
It could be because plates up to 2-1/2" of A514 runs at least 100 ksi, out of D1.1 scope. Also the heat input needs to be monitored more closely and it may also need heat treatment. I can see a few reasons why I wouldn't trust a regular prequalified WPS.
Carl