WPQ w/charpy requirements

[east2195]

Does anyone knows, if I have a HSLA-100 3/4" steel, should I do a charpy test for a welding procedure qualification? If Yes what standard I should use?
Thanks

 

[weldstan]

If trhe design dictates (low temperature, cyclic or other dynamic loading service), yes.

 

[Duwe6]

If you decide that this instance does not require charpys, still keep the leftovers from the PQR coupon. If you have a future need for a WPS with impacts, your welding and tensils & bends are already done. Just send in some of the original coupon to have the charpys performed. Use a permanent marker on the leftovers to maintain traceability, and keep track of actual heat input during the welding of the PQR coupon.

 

[east2195]

Thanks, but I did coupon only 3/8" and right now I need to do a min 1/2"

 

[weldstan]

If you have a Charpy impact test on 3/8" thick material, you would be qualified from 3/8" to 3/4" per ASME IX. What is the problem in welding up a 1/2" thick coupon for impact testing? It truly is not that expensive.

 

[SectionIX]

Do a hardness traverse as well. Like welstan mentioned, its not that expensive.

 

[metengr]

Hardness testing is required by QW-290 to qualify temper bead, if nothing more for information purposes unless the code of construction or standard states an acceptable hardness. The problem when there is no acceptance criteria for hardness is what one does with what is acceptable hardness.

 

[gtaw]

If you don't already know what welding standard you are working to, how can you qualify a WPS?

There are several welding standards in use. Different welding standards are applicable to different types of fabrication, i.e., structural steel framing, bridges, boilers, pressure piping, ships, etc. Each welding standard has different requirements regarding the type of testing required, acceptance criteria for the tests, ect.

Before an attempt is made to qualify a WPS, one must determine what welding standard is applicable.

Best regards - Al

 

[east2195]

Thank you all for your respond. Yes, I know what welding standard we are working for. It’s tech.pub. 248.
And I have a one more questions. In this standard in the table VII is missing a group of material S-11D (HSLA-100).
May be some one has an email or a letter from the NAVY about this mistake or has some information?

 

[gtaw]

I see what you mean. S-11D isn't listed in Table VII. However, footnote 2 may be some help. When in doubt, ask your client. Ultimately, the question willo have to be answered by either SupShips or NAVSEA.

I believe the response is buried in footnote 2, i.e., thickness of the base metal and whether both the F.M. and the B.M. have published toughness requirements. I would be very surprised is the latter didn't govern.

Best regards - Al

 

[east2195]

Dear gtaw- Al,
It is truth, but my boss do not believed me. this is another problem

 

[gtaw]

The boss might not be right, but he's never wrong.

Continue butting your head into the concrete wall until it starts to feel good. That's considered progress by some people.

You can lead a horse to water, but you can't make it wear a bikini.

Other than these pearls of wisdom, there's little else I can offer.

Best regards - Al

 

[DekDee]

Thanks for those pearls of wisdom Al - LMFAO !