Hard-facing SA335 Gr.91
Hard-facing SA335 Gr.91
(OP)
Hey Guys,
Does anyone have any experience of hard-facing Gr 91 alloy. I have never attempted anything like this and we may have a customer who is interested in pursuing this. The pipe ID would have to be clad for a solid containing slurry.
Any comments would be welcome.
Hard-facing consumable: Postalloy 2826-SPL
Design Temp: 707F
Design Pressure: 290 psig
Code of Construction: B31.3
Thanks
Does anyone have any experience of hard-facing Gr 91 alloy. I have never attempted anything like this and we may have a customer who is interested in pursuing this. The pipe ID would have to be clad for a solid containing slurry.
Any comments would be welcome.
Hard-facing consumable: Postalloy 2826-SPL
Design Temp: 707F
Design Pressure: 290 psig
Code of Construction: B31.3
Thanks





RE: Hard-facing SA335 Gr.91
Why was Grade 91 even selected when the service temperature is only 700 deg F??
RE: Hard-facing SA335 Gr.91
Thanks for the reply.
I have absolutely no idea why Gr 91 was specified. I am having communication problems at the moment due to a language barrier.
I am meeting he customer face to face tomorrow and hopefully he can shed some light on his reasoning.
I was thinking along the same idea as you by using an inconel buttering layer and then applying the hardfacing.
Thanks
RE: Hard-facing SA335 Gr.91
Bill
RE: Hard-facing SA335 Gr.91
They would be ahead to drop back to an alloy that is less heat treat sensitive and hard face it.
Doing this to 91 will be very problematic, if they care about the final properties at all.
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Plymouth Tube
RE: Hard-facing SA335 Gr.91
Thanks Again.