Qualification with base metal greater than 100 ksi [690 MPa]

By neto-porto Date 03-22-2015 03:28

Hi,
What is code used for qualification of Welding Procedure Specification (WPS) of low alloy steels with a minimum specified yield strength greater than 100 ksi [690 MPa] ?
I am looking to do the welding procedure qualification for the base metal Hardox 450.
http://www.ssab.com/Global/HARDOX/Datasheets/en/168_HARDOX_450_UK_Data%20Sheet.pdf

By 803056

Date 03-25-2015 17:54

You can follow AWS B2.1 for the methodology of qualifying the WPS. You could also use AWS D1.1, Clause 4 as the governing document.

Best regards - Al

By neto-porto Date 03-26-2015 20:53 Edited 03-26-2015 20:56

I cant use (AWS D1.1) clause 4, why of the limitation yield strength base metal equal than 100 ksi [690 MPa] or less.

By 803056

Date 03-27-2015 02:24

The limitation to materials having a yield strength of 100 ksi or less doesn't apply when the procedure is qualified by testing with the Owner's Engineer's approval.

Clause 4 is the means and methods of qualifying the WPS when the conditions of prequalification cannot be met. I would say Clause 4 is the way to go.

Best regards - Al

By welderbrent (*****)

Date 03-27-2015 16:28

Just to throw some little needed support Al's way,

Clause 4 is there to enable the contractor to get a procedure approved by testing that is not already 'Pre-Approved' by past history. Things like processes: GTAW, GMAW-S, etc. Things like materials not listed in Table 3.1 for whatever reason. Things like material that is outside the normal scope of D1.1 as specified in Clause 1.2 and other places for tensile and/or yield strength. And other similar situations.

So you may indeed qualify your material and thus your procedure by testing per Clause 4 of D1.1:2010.

He Is In Control, Have a Great Day, Brent