Weld clad hardness

[metboss]

Hi all,

We are going to manufacture Wellhead equipment with cladded internals(API 6A/Base metal AISI 4130 + Inco 625 cladding).
As per API 6A, hardness testing on cladded surface is required for welding procedure qualification only whereas client is instructing us to carry it on production part cladded surface.

My question is “Does hardness testing is mandatory for cladding after production as per API 6A ?”.

Regards

 

[Duwe6]

API 6A requirements can be 'trumped' by more stringent Customer Spec. Perform the testing & charge them for the work.

 

[weldstan]

If it is physically possible to do so, meet the customer's requirement.

 

[Guest102023]

Your customer was wise to demand testing on the production part. Almost anything can be made to pass a procedure qualification test once.

"If you don't have time to do the job right the first time, when are you going to find time to repair it?"

 

[vanci]

I am not familiar with API, so I have to ask why would hardness testing be required for I625 cladding? In my experience 625 is deposited for corrosion resistance not for wear resistance.

 

[yudhichen]

As i look at API6A 20th Edition table 18, it doesnt mention hardness measurement after completion (weld overlay process done).
The hardness requirement was regulated on NACE MR0175 for weld overlay to check on base metal, HAZ, and clad metal.
In general, hardness measurement act as assurance & simple verification either PWHT process after overlay has been done correctly,
prior to be machine into final dimension. CMIIW.

Regards,