PTA Hardfacing 4330V

[gpdm]

Hi Everyone. Really nice to see this forum. Seems like a wealth of information in here!

I have a question relating to something a customer requested. A piece which where the spec calls for 4340 to be hardfaced, is going to use 4330Vmod instead. Are there any special considerations to be made for this change? Typically for 4340 we would preheat to 600F, interpass maintained at 700F and PWHT by wrapping for an hour and slow cool. What would be done differently for the 4330vmod? Anything I should look out for?

Thanks and regards,

Garth

 

[metengr]

The 4330V has good weldability because of lower carbon content in comparison to 4340. I would treat the 4330V the same as 4340 in terms of preheat and keep the surface clean before hardfacing. Verify your PWHT temperature with 4330V to ensure you do not alter the bulk mechanical properties obtained from the original heat treatment.

 

[gpdm]

Thanks very much Metengr.

 

[gpdm]

Is there a good book or other resource that I could read to get a better understanding of PWHT for particular materials and situations? Thanks

 

[metengr]

gpdm;
You can perform a search on the ET forums or internet. Both contain excellent resource material through links. Use key word phrases to search out free publications on the internet.