[MW:19054] Welding between Alloy 625 to P 91 and Alloy 625 to SS 347 H

My Dear Experts,

 

I need weld  SS 347 H to Alloy 625 and  also Alloy 625 to P 91 materails.  The scope of work is attached.  The follwing tests need to be done.  If any body is having expreience please share the welding  procedures of any reserch papers related to it.

a.   M icro hardness at surface and subsurface of HAZ (towards P91 side)

b.    SEM/EDS to find ferrite formation at interface (towards P91 side)

c.     Creep assessment for 1000hrs at temperature 530deg.C ( As per ASTM E139).

d.    Mechanical test

e.     Metallographic examination on cross section (to cover base metal, interface & HAZ towards P91 Side and weld)

f.     Impact Testing

g.    Chemical analysis of weld metal.

Note : Point No. b & c shall be lab report review only.

B. The Furnace PWHT shall be performed for Spool

 

 

Regards

 

VENKAT

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