Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

S275 to S355 material welding

S275 to S355 material welding

S275 to S355 material welding


We qualified our welders in S275 to S355 materials in AWS D1.1, SMAW, 3G position and submitted to client and client has approved the WPQR . While during the production welding one of our qualified welder was welding S275 to S275 material and another welder was welding S355 to S355 material with the approved WPQR (S275 to S355), with same parameters, but client has stopped the work and insisted to qualify the welders separately in S275 to S275 material and S355 to S355 material for preforming the job instead of single WPQR (S275 to S355). My question is do they really required sperate qualification for S275 to S275 and S355 to S355 ? or S275 to S355 material qualification is enough to weld the above materials?

RE: S275 to S355 material welding

First question: Are the WPSs qualified in accordance with AWS D1.1. The base metals you listed are not listed in D1.1, so they have to be qualified by testing. It would appear that you need 3 PQRs: one for S275 to S275, one for S355 to S355, and finally a PQR for S275 to S355. If all the variable are the same, i.e., same process, same filler metal, etc., the three PQRs can be used to support one WPS.

If the welders were qualified to the WPS that includes the three combinations supported by the PQRs listed above, you're good to go.

Generally, the welder performance test is where the welder demonstrates the ability to deposit a sound weld and can follow the WPS as written. AWS D1.1 only covers carbon and high strength low alloy steels. Unlike ASME, AWS D1.1 doesn't include provisions for dissimilar metals, so it can get pretty muddy really quick. The Owner (your customer) has final authority to accept the contractor's WPS and supporting documentation. It's the Golden Rule of business; He who holds the gold makes the rules. If the Owner says he wants the welders qualified on the combinations, that's what they get.

Best regards - Al

RE: S275 to S355 material welding


Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close