Fwd: Welding Consumable - SA 479 410SS (Control valve seal retainer)

[Sanjay Viswanathan]

I have to repair / re thread a threaded portion of a 3" control valve seal retainer (Material is SA 479 410SS).

What will be the suitable consumable for this?

Service: Boiler feed water pump outlet.

Size : 3" 1500#

Body: A216 WCB

Thanks & Best Regards

Sanjay

[Vishwas Keskar Welding Manager WELDING]

PL. SEND DRAWING/WELDING CONFIGURATION

[Mehrab Chakoshkar]

You can use E410 and sometimes E309, But for your case, my best suggestion is ERNiCrMo-3 because your service operation is associated with corrosion and erosion and further there is carbon steel material there that will be joined to SS.

ER CrNiMo-3

GTAW if possible

Preheat for thk>1" about 100 C

if you wanna healing the surface use AC plus 50-50%

[james gerald]

I suppose It is a seal weld in Valve Trim part. Try ER 309L or ER NiCr3 for TIG welding.  Since this is a martensitic stainless steel the base material SS 410 has to be preheated to 200DegC while welding. 3inch control valve amd I suppose warming using TIG torch before welding will suffice.

Thanks & Regards

J.Gerald Jayakumar

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