Welding Procedure Specification (WPS) for the base metal AISI 8630(weld overlay cladding

[metboss]

Hi All,

We have recently received a Welding Procedure Specification (WPS for Weld overlay cladding with Inconel: ERNiCRMO3) from our supplier indicating the base metal as AISI 8630 with a yield strength range of either 60 KSI or 80 KSI. However, the Procedure Qualification Record (PQR) is qualified with AISI 8630 KSI material. Given that AISI 8630 is an unassigned material, we need some clarification. Should the WPS strictly adhere to the actual PQR value of 80 KSI, or is it acceptable for the WPS to show a yield strength range (i.e. 60 KSI or 80 KSI)?

Additionally, our project requirements specify the use of AISI 4130 material(weld overlay cladding) with a yield strength of 75 KSI. Considering this, is it permissible to use the aforementioned WPS (with 8630 material) for the 4130 application?
Any insight or guidance from the team members would be highly appreciated.

Thanks.......

 

[weldstan]

Since the material to be overlayed is 4130, not 8630, you need to requalify on 4130 material.